Deleted vendor folder

17 files changed, 0 insertions, 8578 deletions

diff --git a/vendor/serde_derive/src/bound.rs b/vendor/serde_derive/src/bound.rs
deleted file mode 100644
index fe8ccff..0000000
--- a/vendor/serde_derive/src/bound.rs
+++ /dev/null
@@ -1,408 +0,0 @@
-use crate::internals::ast::{Container, Data};
-use crate::internals::{attr, ungroup};
-use proc_macro2::Span;
-use std::collections::HashSet;
-use syn::punctuated::{Pair, Punctuated};
-use syn::Token;
-
-// Remove the default from every type parameter because in the generated impls
-// they look like associated types: "error: associated type bindings are not
-// allowed here".
-pub fn without_defaults(generics: &syn::Generics) -> syn::Generics {
-    syn::Generics {
-        params: generics
-            .params
-            .iter()
-            .map(|param| match param {
-                syn::GenericParam::Type(param) => syn::GenericParam::Type(syn::TypeParam {
-                    eq_token: None,
-                    default: None,
-                    ..param.clone()
-                }),
-                _ => param.clone(),
-            })
-            .collect(),
-        ..generics.clone()
-    }
-}
-
-pub fn with_where_predicates(
-    generics: &syn::Generics,
-    predicates: &[syn::WherePredicate],
-) -> syn::Generics {
-    let mut generics = generics.clone();
-    generics
-        .make_where_clause()
-        .predicates
-        .extend(predicates.iter().cloned());
-    generics
-}
-
-pub fn with_where_predicates_from_fields(
-    cont: &Container,
-    generics: &syn::Generics,
-    from_field: fn(&attr::Field) -> Option<&[syn::WherePredicate]>,
-) -> syn::Generics {
-    let predicates = cont
-        .data
-        .all_fields()
-        .filter_map(|field| from_field(&field.attrs))
-        .flat_map(<[syn::WherePredicate]>::to_vec);
-
-    let mut generics = generics.clone();
-    generics.make_where_clause().predicates.extend(predicates);
-    generics
-}
-
-pub fn with_where_predicates_from_variants(
-    cont: &Container,
-    generics: &syn::Generics,
-    from_variant: fn(&attr::Variant) -> Option<&[syn::WherePredicate]>,
-) -> syn::Generics {
-    let variants = match &cont.data {
-        Data::Enum(variants) => variants,
-        Data::Struct(_, _) => {
-            return generics.clone();
-        }
-    };
-
-    let predicates = variants
-        .iter()
-        .filter_map(|variant| from_variant(&variant.attrs))
-        .flat_map(<[syn::WherePredicate]>::to_vec);
-
-    let mut generics = generics.clone();
-    generics.make_where_clause().predicates.extend(predicates);
-    generics
-}
-
-// Puts the given bound on any generic type parameters that are used in fields
-// for which filter returns true.
-//
-// For example, the following struct needs the bound `A: Serialize, B:
-// Serialize`.
-//
-//     struct S<'b, A, B: 'b, C> {
-//         a: A,
-//         b: Option<&'b B>
-//         #[serde(skip_serializing)]
-//         c: C,
-//     }
-pub fn with_bound(
-    cont: &Container,
-    generics: &syn::Generics,
-    filter: fn(&attr::Field, Option<&attr::Variant>) -> bool,
-    bound: &syn::Path,
-) -> syn::Generics {
-    struct FindTyParams<'ast> {
-        // Set of all generic type parameters on the current struct (A, B, C in
-        // the example). Initialized up front.
-        all_type_params: HashSet<syn::Ident>,
-
-        // Set of generic type parameters used in fields for which filter
-        // returns true (A and B in the example). Filled in as the visitor sees
-        // them.
-        relevant_type_params: HashSet<syn::Ident>,
-
-        // Fields whose type is an associated type of one of the generic type
-        // parameters.
-        associated_type_usage: Vec<&'ast syn::TypePath>,
-    }
-
-    impl<'ast> FindTyParams<'ast> {
-        fn visit_field(&mut self, field: &'ast syn::Field) {
-            if let syn::Type::Path(ty) = ungroup(&field.ty) {
-                if let Some(Pair::Punctuated(t, _)) = ty.path.segments.pairs().next() {
-                    if self.all_type_params.contains(&t.ident) {
-                        self.associated_type_usage.push(ty);
-                    }
-                }
-            }
-            self.visit_type(&field.ty);
-        }
-
-        fn visit_path(&mut self, path: &'ast syn::Path) {
-            if let Some(seg) = path.segments.last() {
-                if seg.ident == "PhantomData" {
-                    // Hardcoded exception, because PhantomData<T> implements
-                    // Serialize and Deserialize whether or not T implements it.
-                    return;
-                }
-            }
-            if path.leading_colon.is_none() && path.segments.len() == 1 {
-                let id = &path.segments[0].ident;
-                if self.all_type_params.contains(id) {
-                    self.relevant_type_params.insert(id.clone());
-                }
-            }
-            for segment in &path.segments {
-                self.visit_path_segment(segment);
-            }
-        }
-
-        // Everything below is simply traversing the syntax tree.
-
-        fn visit_type(&mut self, ty: &'ast syn::Type) {
-            match ty {
-                #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
-                syn::Type::Array(ty) => self.visit_type(&ty.elem),
-                syn::Type::BareFn(ty) => {
-                    for arg in &ty.inputs {
-                        self.visit_type(&arg.ty);
-                    }
-                    self.visit_return_type(&ty.output);
-                }
-                syn::Type::Group(ty) => self.visit_type(&ty.elem),
-                syn::Type::ImplTrait(ty) => {
-                    for bound in &ty.bounds {
-                        self.visit_type_param_bound(bound);
-                    }
-                }
-                syn::Type::Macro(ty) => self.visit_macro(&ty.mac),
-                syn::Type::Paren(ty) => self.visit_type(&ty.elem),
-                syn::Type::Path(ty) => {
-                    if let Some(qself) = &ty.qself {
-                        self.visit_type(&qself.ty);
-                    }
-                    self.visit_path(&ty.path);
-                }
-                syn::Type::Ptr(ty) => self.visit_type(&ty.elem),
-                syn::Type::Reference(ty) => self.visit_type(&ty.elem),
-                syn::Type::Slice(ty) => self.visit_type(&ty.elem),
-                syn::Type::TraitObject(ty) => {
-                    for bound in &ty.bounds {
-                        self.visit_type_param_bound(bound);
-                    }
-                }
-                syn::Type::Tuple(ty) => {
-                    for elem in &ty.elems {
-                        self.visit_type(elem);
-                    }
-                }
-
-                syn::Type::Infer(_) | syn::Type::Never(_) | syn::Type::Verbatim(_) => {}
-
-                _ => {}
-            }
-        }
-
-        fn visit_path_segment(&mut self, segment: &'ast syn::PathSegment) {
-            self.visit_path_arguments(&segment.arguments);
-        }
-
-        fn visit_path_arguments(&mut self, arguments: &'ast syn::PathArguments) {
-            match arguments {
-                syn::PathArguments::None => {}
-                syn::PathArguments::AngleBracketed(arguments) => {
-                    for arg in &arguments.args {
-                        match arg {
-                            #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
-                            syn::GenericArgument::Type(arg) => self.visit_type(arg),
-                            syn::GenericArgument::AssocType(arg) => self.visit_type(&arg.ty),
-                            syn::GenericArgument::Lifetime(_)
-                            | syn::GenericArgument::Const(_)
-                            | syn::GenericArgument::AssocConst(_)
-                            | syn::GenericArgument::Constraint(_) => {}
-                            _ => {}
-                        }
-                    }
-                }
-                syn::PathArguments::Parenthesized(arguments) => {
-                    for argument in &arguments.inputs {
-                        self.visit_type(argument);
-                    }
-                    self.visit_return_type(&arguments.output);
-                }
-            }
-        }
-
-        fn visit_return_type(&mut self, return_type: &'ast syn::ReturnType) {
-            match return_type {
-                syn::ReturnType::Default => {}
-                syn::ReturnType::Type(_, output) => self.visit_type(output),
-            }
-        }
-
-        fn visit_type_param_bound(&mut self, bound: &'ast syn::TypeParamBound) {
-            match bound {
-                #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
-                syn::TypeParamBound::Trait(bound) => self.visit_path(&bound.path),
-                syn::TypeParamBound::Lifetime(_) | syn::TypeParamBound::Verbatim(_) => {}
-                _ => {}
-            }
-        }
-
-        // Type parameter should not be considered used by a macro path.
-        //
-        //     struct TypeMacro<T> {
-        //         mac: T!(),
-        //         marker: PhantomData<T>,
-        //     }
-        fn visit_macro(&mut self, _mac: &'ast syn::Macro) {}
-    }
-
-    let all_type_params = generics
-        .type_params()
-        .map(|param| param.ident.clone())
-        .collect();
-
-    let mut visitor = FindTyParams {
-        all_type_params,
-        relevant_type_params: HashSet::new(),
-        associated_type_usage: Vec::new(),
-    };
-    match &cont.data {
-        Data::Enum(variants) => {
-            for variant in variants {
-                let relevant_fields = variant
-                    .fields
-                    .iter()
-                    .filter(|field| filter(&field.attrs, Some(&variant.attrs)));
-                for field in relevant_fields {
-                    visitor.visit_field(field.original);
-                }
-            }
-        }
-        Data::Struct(_, fields) => {
-            for field in fields.iter().filter(|field| filter(&field.attrs, None)) {
-                visitor.visit_field(field.original);
-            }
-        }
-    }
-
-    let relevant_type_params = visitor.relevant_type_params;
-    let associated_type_usage = visitor.associated_type_usage;
-    let new_predicates = generics
-        .type_params()
-        .map(|param| param.ident.clone())
-        .filter(|id| relevant_type_params.contains(id))
-        .map(|id| syn::TypePath {
-            qself: None,
-            path: id.into(),
-        })
-        .chain(associated_type_usage.into_iter().cloned())
-        .map(|bounded_ty| {
-            syn::WherePredicate::Type(syn::PredicateType {
-                lifetimes: None,
-                // the type parameter that is being bounded e.g. T
-                bounded_ty: syn::Type::Path(bounded_ty),
-                colon_token: <Token![:]>::default(),
-                // the bound e.g. Serialize
-                bounds: vec![syn::TypeParamBound::Trait(syn::TraitBound {
-                    paren_token: None,
-                    modifier: syn::TraitBoundModifier::None,
-                    lifetimes: None,
-                    path: bound.clone(),
-                })]
-                .into_iter()
-                .collect(),
-            })
-        });
-
-    let mut generics = generics.clone();
-    generics
-        .make_where_clause()
-        .predicates
-        .extend(new_predicates);
-    generics
-}
-
-pub fn with_self_bound(
-    cont: &Container,
-    generics: &syn::Generics,
-    bound: &syn::Path,
-) -> syn::Generics {
-    let mut generics = generics.clone();
-    generics
-        .make_where_clause()
-        .predicates
-        .push(syn::WherePredicate::Type(syn::PredicateType {
-            lifetimes: None,
-            // the type that is being bounded e.g. MyStruct<'a, T>
-            bounded_ty: type_of_item(cont),
-            colon_token: <Token![:]>::default(),
-            // the bound e.g. Default
-            bounds: vec![syn::TypeParamBound::Trait(syn::TraitBound {
-                paren_token: None,
-                modifier: syn::TraitBoundModifier::None,
-                lifetimes: None,
-                path: bound.clone(),
-            })]
-            .into_iter()
-            .collect(),
-        }));
-    generics
-}
-
-pub fn with_lifetime_bound(generics: &syn::Generics, lifetime: &str) -> syn::Generics {
-    let bound = syn::Lifetime::new(lifetime, Span::call_site());
-    let def = syn::LifetimeParam {
-        attrs: Vec::new(),
-        lifetime: bound.clone(),
-        colon_token: None,
-        bounds: Punctuated::new(),
-    };
-
-    let params = Some(syn::GenericParam::Lifetime(def))
-        .into_iter()
-        .chain(generics.params.iter().cloned().map(|mut param| {
-            match &mut param {
-                syn::GenericParam::Lifetime(param) => {
-                    param.bounds.push(bound.clone());
-                }
-                syn::GenericParam::Type(param) => {
-                    param
-                        .bounds
-                        .push(syn::TypeParamBound::Lifetime(bound.clone()));
-                }
-                syn::GenericParam::Const(_) => {}
-            }
-            param
-        }))
-        .collect();
-
-    syn::Generics {
-        params,
-        ..generics.clone()
-    }
-}
-
-fn type_of_item(cont: &Container) -> syn::Type {
-    syn::Type::Path(syn::TypePath {
-        qself: None,
-        path: syn::Path {
-            leading_colon: None,
-            segments: vec![syn::PathSegment {
-                ident: cont.ident.clone(),
-                arguments: syn::PathArguments::AngleBracketed(
-                    syn::AngleBracketedGenericArguments {
-                        colon2_token: None,
-                        lt_token: <Token![<]>::default(),
-                        args: cont
-                            .generics
-                            .params
-                            .iter()
-                            .map(|param| match param {
-                                syn::GenericParam::Type(param) => {
-                                    syn::GenericArgument::Type(syn::Type::Path(syn::TypePath {
-                                        qself: None,
-                                        path: param.ident.clone().into(),
-                                    }))
-                                }
-                                syn::GenericParam::Lifetime(param) => {
-                                    syn::GenericArgument::Lifetime(param.lifetime.clone())
-                                }
-                                syn::GenericParam::Const(_) => {
-                                    panic!("Serde does not support const generics yet");
-                                }
-                            })
-                            .collect(),
-                        gt_token: <Token![>]>::default(),
-                    },
-                ),
-            }]
-            .into_iter()
-            .collect(),
-        },
-    })
-}
diff --git a/vendor/serde_derive/src/de.rs b/vendor/serde_derive/src/de.rs
deleted file mode 100644
index e3b737c..0000000
--- a/vendor/serde_derive/src/de.rs
+++ /dev/null
@@ -1,3148 +0,0 @@
-use crate::fragment::{Expr, Fragment, Match, Stmts};
-use crate::internals::ast::{Container, Data, Field, Style, Variant};
-use crate::internals::{attr, replace_receiver, ungroup, Ctxt, Derive};
-use crate::{bound, dummy, pretend, this};
-use proc_macro2::{Literal, Span, TokenStream};
-use quote::{quote, quote_spanned, ToTokens};
-use std::collections::BTreeSet;
-use std::ptr;
-use syn::punctuated::Punctuated;
-use syn::spanned::Spanned;
-use syn::{parse_quote, Ident, Index, Member};
-
-pub fn expand_derive_deserialize(input: &mut syn::DeriveInput) -> syn::Result<TokenStream> {
-    replace_receiver(input);
-
-    let ctxt = Ctxt::new();
-    let cont = match Container::from_ast(&ctxt, input, Derive::Deserialize) {
-        Some(cont) => cont,
-        None => return Err(ctxt.check().unwrap_err()),
-    };
-    precondition(&ctxt, &cont);
-    ctxt.check()?;
-
-    let ident = &cont.ident;
-    let params = Parameters::new(&cont);
-    let (de_impl_generics, _, ty_generics, where_clause) = split_with_de_lifetime(&params);
-    let body = Stmts(deserialize_body(&cont, &params));
-    let delife = params.borrowed.de_lifetime();
-    let serde = cont.attrs.serde_path();
-
-    let impl_block = if let Some(remote) = cont.attrs.remote() {
-        let vis = &input.vis;
-        let used = pretend::pretend_used(&cont, params.is_packed);
-        quote! {
-            impl #de_impl_generics #ident #ty_generics #where_clause {
-                #vis fn deserialize<__D>(__deserializer: __D) -> #serde::__private::Result<#remote #ty_generics, __D::Error>
-                where
-                    __D: #serde::Deserializer<#delife>,
-                {
-                    #used
-                    #body
-                }
-            }
-        }
-    } else {
-        let fn_deserialize_in_place = deserialize_in_place_body(&cont, &params);
-
-        quote! {
-            #[automatically_derived]
-            impl #de_impl_generics #serde::Deserialize<#delife> for #ident #ty_generics #where_clause {
-                fn deserialize<__D>(__deserializer: __D) -> #serde::__private::Result<Self, __D::Error>
-                where
-                    __D: #serde::Deserializer<#delife>,
-                {
-                    #body
-                }
-
-                #fn_deserialize_in_place
-            }
-        }
-    };
-
-    Ok(dummy::wrap_in_const(
-        cont.attrs.custom_serde_path(),
-        impl_block,
-    ))
-}
-
-fn precondition(cx: &Ctxt, cont: &Container) {
-    precondition_sized(cx, cont);
-    precondition_no_de_lifetime(cx, cont);
-}
-
-fn precondition_sized(cx: &Ctxt, cont: &Container) {
-    if let Data::Struct(_, fields) = &cont.data {
-        if let Some(last) = fields.last() {
-            if let syn::Type::Slice(_) = ungroup(last.ty) {
-                cx.error_spanned_by(
-                    cont.original,
-                    "cannot deserialize a dynamically sized struct",
-                );
-            }
-        }
-    }
-}
-
-fn precondition_no_de_lifetime(cx: &Ctxt, cont: &Container) {
-    if let BorrowedLifetimes::Borrowed(_) = borrowed_lifetimes(cont) {
-        for param in cont.generics.lifetimes() {
-            if param.lifetime.to_string() == "'de" {
-                cx.error_spanned_by(
-                    &param.lifetime,
-                    "cannot deserialize when there is a lifetime parameter called 'de",
-                );
-                return;
-            }
-        }
-    }
-}
-
-struct Parameters {
-    /// Name of the type the `derive` is on.
-    local: syn::Ident,
-
-    /// Path to the type the impl is for. Either a single `Ident` for local
-    /// types (does not include generic parameters) or `some::remote::Path` for
-    /// remote types.
-    this_type: syn::Path,
-
-    /// Same as `this_type` but using `::<T>` for generic parameters for use in
-    /// expression position.
-    this_value: syn::Path,
-
-    /// Generics including any explicit and inferred bounds for the impl.
-    generics: syn::Generics,
-
-    /// Lifetimes borrowed from the deserializer. These will become bounds on
-    /// the `'de` lifetime of the deserializer.
-    borrowed: BorrowedLifetimes,
-
-    /// At least one field has a serde(getter) attribute, implying that the
-    /// remote type has a private field.
-    has_getter: bool,
-
-    /// Type has a repr(packed) attribute.
-    is_packed: bool,
-}
-
-impl Parameters {
-    fn new(cont: &Container) -> Self {
-        let local = cont.ident.clone();
-        let this_type = this::this_type(cont);
-        let this_value = this::this_value(cont);
-        let borrowed = borrowed_lifetimes(cont);
-        let generics = build_generics(cont, &borrowed);
-        let has_getter = cont.data.has_getter();
-        let is_packed = cont.attrs.is_packed();
-
-        Parameters {
-            local,
-            this_type,
-            this_value,
-            generics,
-            borrowed,
-            has_getter,
-            is_packed,
-        }
-    }
-
-    /// Type name to use in error messages and `&'static str` arguments to
-    /// various Deserializer methods.
-    fn type_name(&self) -> String {
-        self.this_type.segments.last().unwrap().ident.to_string()
-    }
-}
-
-// All the generics in the input, plus a bound `T: Deserialize` for each generic
-// field type that will be deserialized by us, plus a bound `T: Default` for
-// each generic field type that will be set to a default value.
-fn build_generics(cont: &Container, borrowed: &BorrowedLifetimes) -> syn::Generics {
-    let generics = bound::without_defaults(cont.generics);
-
-    let generics = bound::with_where_predicates_from_fields(cont, &generics, attr::Field::de_bound);
-
-    let generics =
-        bound::with_where_predicates_from_variants(cont, &generics, attr::Variant::de_bound);
-
-    match cont.attrs.de_bound() {
-        Some(predicates) => bound::with_where_predicates(&generics, predicates),
-        None => {
-            let generics = match *cont.attrs.default() {
-                attr::Default::Default => bound::with_self_bound(
-                    cont,
-                    &generics,
-                    &parse_quote!(_serde::__private::Default),
-                ),
-                attr::Default::None | attr::Default::Path(_) => generics,
-            };
-
-            let delife = borrowed.de_lifetime();
-            let generics = bound::with_bound(
-                cont,
-                &generics,
-                needs_deserialize_bound,
-                &parse_quote!(_serde::Deserialize<#delife>),
-            );
-
-            bound::with_bound(
-                cont,
-                &generics,
-                requires_default,
-                &parse_quote!(_serde::__private::Default),
-            )
-        }
-    }
-}
-
-// Fields with a `skip_deserializing` or `deserialize_with` attribute, or which
-// belong to a variant with a `skip_deserializing` or `deserialize_with`
-// attribute, are not deserialized by us so we do not generate a bound. Fields
-// with a `bound` attribute specify their own bound so we do not generate one.
-// All other fields may need a `T: Deserialize` bound where T is the type of the
-// field.
-fn needs_deserialize_bound(field: &attr::Field, variant: Option<&attr::Variant>) -> bool {
-    !field.skip_deserializing()
-        && field.deserialize_with().is_none()
-        && field.de_bound().is_none()
-        && variant.map_or(true, |variant| {
-            !variant.skip_deserializing()
-                && variant.deserialize_with().is_none()
-                && variant.de_bound().is_none()
-        })
-}
-
-// Fields with a `default` attribute (not `default=...`), and fields with a
-// `skip_deserializing` attribute that do not also have `default=...`.
-fn requires_default(field: &attr::Field, _variant: Option<&attr::Variant>) -> bool {
-    if let attr::Default::Default = *field.default() {
-        true
-    } else {
-        false
-    }
-}
-
-enum BorrowedLifetimes {
-    Borrowed(BTreeSet<syn::Lifetime>),
-    Static,
-}
-
-impl BorrowedLifetimes {
-    fn de_lifetime(&self) -> syn::Lifetime {
-        match *self {
-            BorrowedLifetimes::Borrowed(_) => syn::Lifetime::new("'de", Span::call_site()),
-            BorrowedLifetimes::Static => syn::Lifetime::new("'static", Span::call_site()),
-        }
-    }
-
-    fn de_lifetime_param(&self) -> Option<syn::LifetimeParam> {
-        match self {
-            BorrowedLifetimes::Borrowed(bounds) => Some(syn::LifetimeParam {
-                attrs: Vec::new(),
-                lifetime: syn::Lifetime::new("'de", Span::call_site()),
-                colon_token: None,
-                bounds: bounds.iter().cloned().collect(),
-            }),
-            BorrowedLifetimes::Static => None,
-        }
-    }
-}
-
-// The union of lifetimes borrowed by each field of the container.
-//
-// These turn into bounds on the `'de` lifetime of the Deserialize impl. If
-// lifetimes `'a` and `'b` are borrowed but `'c` is not, the impl is:
-//
-//     impl<'de: 'a + 'b, 'a, 'b, 'c> Deserialize<'de> for S<'a, 'b, 'c>
-//
-// If any borrowed lifetime is `'static`, then `'de: 'static` would be redundant
-// and we use plain `'static` instead of `'de`.
-fn borrowed_lifetimes(cont: &Container) -> BorrowedLifetimes {
-    let mut lifetimes = BTreeSet::new();
-    for field in cont.data.all_fields() {
-        if !field.attrs.skip_deserializing() {
-            lifetimes.extend(field.attrs.borrowed_lifetimes().iter().cloned());
-        }
-    }
-    if lifetimes.iter().any(|b| b.to_string() == "'static") {
-        BorrowedLifetimes::Static
-    } else {
-        BorrowedLifetimes::Borrowed(lifetimes)
-    }
-}
-
-fn deserialize_body(cont: &Container, params: &Parameters) -> Fragment {
-    if cont.attrs.transparent() {
-        deserialize_transparent(cont, params)
-    } else if let Some(type_from) = cont.attrs.type_from() {
-        deserialize_from(type_from)
-    } else if let Some(type_try_from) = cont.attrs.type_try_from() {
-        deserialize_try_from(type_try_from)
-    } else if let attr::Identifier::No = cont.attrs.identifier() {
-        match &cont.data {
-            Data::Enum(variants) => deserialize_enum(params, variants, &cont.attrs),
-            Data::Struct(Style::Struct, fields) => {
-                deserialize_struct(params, fields, &cont.attrs, StructForm::Struct)
-            }
-            Data::Struct(Style::Tuple, fields) | Data::Struct(Style::Newtype, fields) => {
-                deserialize_tuple(params, fields, &cont.attrs, TupleForm::Tuple)
-            }
-            Data::Struct(Style::Unit, _) => deserialize_unit_struct(params, &cont.attrs),
-        }
-    } else {
-        match &cont.data {
-            Data::Enum(variants) => deserialize_custom_identifier(params, variants, &cont.attrs),
-            Data::Struct(_, _) => unreachable!("checked in serde_derive_internals"),
-        }
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-fn deserialize_in_place_body(cont: &Container, params: &Parameters) -> Option<Stmts> {
-    // Only remote derives have getters, and we do not generate
-    // deserialize_in_place for remote derives.
-    assert!(!params.has_getter);
-
-    if cont.attrs.transparent()
-        || cont.attrs.type_from().is_some()
-        || cont.attrs.type_try_from().is_some()
-        || cont.attrs.identifier().is_some()
-        || cont
-            .data
-            .all_fields()
-            .all(|f| f.attrs.deserialize_with().is_some())
-    {
-        return None;
-    }
-
-    let code = match &cont.data {
-        Data::Struct(Style::Struct, fields) => {
-            deserialize_struct_in_place(params, fields, &cont.attrs)?
-        }
-        Data::Struct(Style::Tuple, fields) | Data::Struct(Style::Newtype, fields) => {
-            deserialize_tuple_in_place(params, fields, &cont.attrs)
-        }
-        Data::Enum(_) | Data::Struct(Style::Unit, _) => {
-            return None;
-        }
-    };
-
-    let delife = params.borrowed.de_lifetime();
-    let stmts = Stmts(code);
-
-    let fn_deserialize_in_place = quote_block! {
-        fn deserialize_in_place<__D>(__deserializer: __D, __place: &mut Self) -> _serde::__private::Result<(), __D::Error>
-        where
-            __D: _serde::Deserializer<#delife>,
-        {
-            #stmts
-        }
-    };
-
-    Some(Stmts(fn_deserialize_in_place))
-}
-
-#[cfg(not(feature = "deserialize_in_place"))]
-fn deserialize_in_place_body(_cont: &Container, _params: &Parameters) -> Option<Stmts> {
-    None
-}
-
-fn deserialize_transparent(cont: &Container, params: &Parameters) -> Fragment {
-    let fields = match &cont.data {
-        Data::Struct(_, fields) => fields,
-        Data::Enum(_) => unreachable!(),
-    };
-
-    let this_value = &params.this_value;
-    let transparent_field = fields.iter().find(|f| f.attrs.transparent()).unwrap();
-
-    let path = match transparent_field.attrs.deserialize_with() {
-        Some(path) => quote!(#path),
-        None => {
-            let span = transparent_field.original.span();
-            quote_spanned!(span=> _serde::Deserialize::deserialize)
-        }
-    };
-
-    let assign = fields.iter().map(|field| {
-        let member = &field.member;
-        if ptr::eq(field, transparent_field) {
-            quote!(#member: __transparent)
-        } else {
-            let value = match field.attrs.default() {
-                attr::Default::Default => quote!(_serde::__private::Default::default()),
-                attr::Default::Path(path) => quote!(#path()),
-                attr::Default::None => quote!(_serde::__private::PhantomData),
-            };
-            quote!(#member: #value)
-        }
-    });
-
-    quote_block! {
-        _serde::__private::Result::map(
-            #path(__deserializer),
-            |__transparent| #this_value { #(#assign),* })
-    }
-}
-
-fn deserialize_from(type_from: &syn::Type) -> Fragment {
-    quote_block! {
-        _serde::__private::Result::map(
-            <#type_from as _serde::Deserialize>::deserialize(__deserializer),
-            _serde::__private::From::from)
-    }
-}
-
-fn deserialize_try_from(type_try_from: &syn::Type) -> Fragment {
-    quote_block! {
-        _serde::__private::Result::and_then(
-            <#type_try_from as _serde::Deserialize>::deserialize(__deserializer),
-            |v| _serde::__private::TryFrom::try_from(v).map_err(_serde::de::Error::custom))
-    }
-}
-
-fn deserialize_unit_struct(params: &Parameters, cattrs: &attr::Container) -> Fragment {
-    let this_type = &params.this_type;
-    let this_value = &params.this_value;
-    let type_name = cattrs.name().deserialize_name();
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-
-    let expecting = format!("unit struct {}", params.type_name());
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    quote_block! {
-        #[doc(hidden)]
-        struct __Visitor #de_impl_generics #where_clause {
-            marker: _serde::__private::PhantomData<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
-            type Value = #this_type #ty_generics;
-
-            fn expecting(&self, __formatter: &mut _serde::__private::Formatter) -> _serde::__private::fmt::Result {
-                _serde::__private::Formatter::write_str(__formatter, #expecting)
-            }
-
-            #[inline]
-            fn visit_unit<__E>(self) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(#this_value)
-            }
-        }
-
-        _serde::Deserializer::deserialize_unit_struct(
-            __deserializer,
-            #type_name,
-            __Visitor {
-                marker: _serde::__private::PhantomData::<#this_type #ty_generics>,
-                lifetime: _serde::__private::PhantomData,
-            },
-        )
-    }
-}
-
-enum TupleForm<'a> {
-    Tuple,
-    /// Contains a variant name
-    ExternallyTagged(&'a syn::Ident),
-    /// Contains a variant name and an intermediate deserializer from which actual
-    /// deserialization will be performed
-    Untagged(&'a syn::Ident, TokenStream),
-}
-
-fn deserialize_tuple(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-    form: TupleForm,
-) -> Fragment {
-    assert!(!cattrs.has_flatten());
-
-    let field_count = fields
-        .iter()
-        .filter(|field| !field.attrs.skip_deserializing())
-        .count();
-
-    let this_type = &params.this_type;
-    let this_value = &params.this_value;
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-
-    // If there are getters (implying private fields), construct the local type
-    // and use an `Into` conversion to get the remote type. If there are no
-    // getters then construct the target type directly.
-    let construct = if params.has_getter {
-        let local = &params.local;
-        quote!(#local)
-    } else {
-        quote!(#this_value)
-    };
-
-    let type_path = match form {
-        TupleForm::Tuple => construct,
-        TupleForm::ExternallyTagged(variant_ident) | TupleForm::Untagged(variant_ident, _) => {
-            quote!(#construct::#variant_ident)
-        }
-    };
-    let expecting = match form {
-        TupleForm::Tuple => format!("tuple struct {}", params.type_name()),
-        TupleForm::ExternallyTagged(variant_ident) | TupleForm::Untagged(variant_ident, _) => {
-            format!("tuple variant {}::{}", params.type_name(), variant_ident)
-        }
-    };
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    let nfields = fields.len();
-
-    let visit_newtype_struct = match form {
-        TupleForm::Tuple if nfields == 1 => {
-            Some(deserialize_newtype_struct(&type_path, params, &fields[0]))
-        }
-        _ => None,
-    };
-
-    let visit_seq = Stmts(deserialize_seq(
-        &type_path, params, fields, false, cattrs, expecting,
-    ));
-
-    let visitor_expr = quote! {
-        __Visitor {
-            marker: _serde::__private::PhantomData::<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData,
-        }
-    };
-    let dispatch = match form {
-        TupleForm::Tuple if nfields == 1 => {
-            let type_name = cattrs.name().deserialize_name();
-            quote! {
-                _serde::Deserializer::deserialize_newtype_struct(__deserializer, #type_name, #visitor_expr)
-            }
-        }
-        TupleForm::Tuple => {
-            let type_name = cattrs.name().deserialize_name();
-            quote! {
-                _serde::Deserializer::deserialize_tuple_struct(__deserializer, #type_name, #field_count, #visitor_expr)
-            }
-        }
-        TupleForm::ExternallyTagged(_) => quote! {
-            _serde::de::VariantAccess::tuple_variant(__variant, #field_count, #visitor_expr)
-        },
-        TupleForm::Untagged(_, deserializer) => quote! {
-            _serde::Deserializer::deserialize_tuple(#deserializer, #field_count, #visitor_expr)
-        },
-    };
-
-    let visitor_var = if field_count == 0 {
-        quote!(_)
-    } else {
-        quote!(mut __seq)
-    };
-
-    quote_block! {
-        #[doc(hidden)]
-        struct __Visitor #de_impl_generics #where_clause {
-            marker: _serde::__private::PhantomData<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
-            type Value = #this_type #ty_generics;
-
-            fn expecting(&self, __formatter: &mut _serde::__private::Formatter) -> _serde::__private::fmt::Result {
-                _serde::__private::Formatter::write_str(__formatter, #expecting)
-            }
-
-            #visit_newtype_struct
-
-            #[inline]
-            fn visit_seq<__A>(self, #visitor_var: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-            where
-                __A: _serde::de::SeqAccess<#delife>,
-            {
-                #visit_seq
-            }
-        }
-
-        #dispatch
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-fn deserialize_tuple_in_place(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-) -> Fragment {
-    assert!(!cattrs.has_flatten());
-
-    let field_count = fields
-        .iter()
-        .filter(|field| !field.attrs.skip_deserializing())
-        .count();
-
-    let this_type = &params.this_type;
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-
-    let expecting = format!("tuple struct {}", params.type_name());
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    let nfields = fields.len();
-
-    let visit_newtype_struct = if nfields == 1 {
-        // We do not generate deserialize_in_place if every field has a
-        // deserialize_with.
-        assert!(fields[0].attrs.deserialize_with().is_none());
-
-        Some(quote! {
-            #[inline]
-            fn visit_newtype_struct<__E>(self, __e: __E) -> _serde::__private::Result<Self::Value, __E::Error>
-            where
-                __E: _serde::Deserializer<#delife>,
-            {
-                _serde::Deserialize::deserialize_in_place(__e, &mut self.place.0)
-            }
-        })
-    } else {
-        None
-    };
-
-    let visit_seq = Stmts(deserialize_seq_in_place(params, fields, cattrs, expecting));
-
-    let visitor_expr = quote! {
-        __Visitor {
-            place: __place,
-            lifetime: _serde::__private::PhantomData,
-        }
-    };
-
-    let type_name = cattrs.name().deserialize_name();
-    let dispatch = if nfields == 1 {
-        quote!(_serde::Deserializer::deserialize_newtype_struct(__deserializer, #type_name, #visitor_expr))
-    } else {
-        quote!(_serde::Deserializer::deserialize_tuple_struct(__deserializer, #type_name, #field_count, #visitor_expr))
-    };
-
-    let visitor_var = if field_count == 0 {
-        quote!(_)
-    } else {
-        quote!(mut __seq)
-    };
-
-    let in_place_impl_generics = de_impl_generics.in_place();
-    let in_place_ty_generics = de_ty_generics.in_place();
-    let place_life = place_lifetime();
-
-    quote_block! {
-        #[doc(hidden)]
-        struct __Visitor #in_place_impl_generics #where_clause {
-            place: &#place_life mut #this_type #ty_generics,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #in_place_impl_generics _serde::de::Visitor<#delife> for __Visitor #in_place_ty_generics #where_clause {
-            type Value = ();
-
-            fn expecting(&self, __formatter: &mut _serde::__private::Formatter) -> _serde::__private::fmt::Result {
-                _serde::__private::Formatter::write_str(__formatter, #expecting)
-            }
-
-            #visit_newtype_struct
-
-            #[inline]
-            fn visit_seq<__A>(self, #visitor_var: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-            where
-                __A: _serde::de::SeqAccess<#delife>,
-            {
-                #visit_seq
-            }
-        }
-
-        #dispatch
-    }
-}
-
-fn deserialize_seq(
-    type_path: &TokenStream,
-    params: &Parameters,
-    fields: &[Field],
-    is_struct: bool,
-    cattrs: &attr::Container,
-    expecting: &str,
-) -> Fragment {
-    let vars = (0..fields.len()).map(field_i as fn(_) -> _);
-
-    let deserialized_count = fields
-        .iter()
-        .filter(|field| !field.attrs.skip_deserializing())
-        .count();
-    let expecting = if deserialized_count == 1 {
-        format!("{} with 1 element", expecting)
-    } else {
-        format!("{} with {} elements", expecting, deserialized_count)
-    };
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    let mut index_in_seq = 0_usize;
-    let let_values = vars.clone().zip(fields).map(|(var, field)| {
-        if field.attrs.skip_deserializing() {
-            let default = Expr(expr_is_missing(field, cattrs));
-            quote! {
-                let #var = #default;
-            }
-        } else {
-            let visit = match field.attrs.deserialize_with() {
-                None => {
-                    let field_ty = field.ty;
-                    let span = field.original.span();
-                    let func =
-                        quote_spanned!(span=> _serde::de::SeqAccess::next_element::<#field_ty>);
-                    quote!(#func(&mut __seq)?)
-                }
-                Some(path) => {
-                    let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
-                    quote!({
-                        #wrapper
-                        _serde::__private::Option::map(
-                            _serde::de::SeqAccess::next_element::<#wrapper_ty>(&mut __seq)?,
-                            |__wrap| __wrap.value)
-                    })
-                }
-            };
-            let value_if_none = expr_is_missing_seq(None, index_in_seq, field, cattrs, expecting);
-            let assign = quote! {
-                let #var = match #visit {
-                    _serde::__private::Some(__value) => __value,
-                    _serde::__private::None => #value_if_none,
-                };
-            };
-            index_in_seq += 1;
-            assign
-        }
-    });
-
-    let mut result = if is_struct {
-        let names = fields.iter().map(|f| &f.member);
-        quote! {
-            #type_path { #( #names: #vars ),* }
-        }
-    } else {
-        quote! {
-            #type_path ( #(#vars),* )
-        }
-    };
-
-    if params.has_getter {
-        let this_type = &params.this_type;
-        let (_, ty_generics, _) = params.generics.split_for_impl();
-        result = quote! {
-            _serde::__private::Into::<#this_type #ty_generics>::into(#result)
-        };
-    }
-
-    let let_default = match cattrs.default() {
-        attr::Default::Default => Some(quote!(
-            let __default: Self::Value = _serde::__private::Default::default();
-        )),
-        attr::Default::Path(path) => Some(quote!(
-            let __default: Self::Value = #path();
-        )),
-        attr::Default::None => {
-            // We don't need the default value, to prevent an unused variable warning
-            // we'll leave the line empty.
-            None
-        }
-    };
-
-    quote_block! {
-        #let_default
-        #(#let_values)*
-        _serde::__private::Ok(#result)
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-fn deserialize_seq_in_place(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-    expecting: &str,
-) -> Fragment {
-    let deserialized_count = fields
-        .iter()
-        .filter(|field| !field.attrs.skip_deserializing())
-        .count();
-    let expecting = if deserialized_count == 1 {
-        format!("{} with 1 element", expecting)
-    } else {
-        format!("{} with {} elements", expecting, deserialized_count)
-    };
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    let mut index_in_seq = 0usize;
-    let write_values = fields.iter().map(|field| {
-        let member = &field.member;
-
-        if field.attrs.skip_deserializing() {
-            let default = Expr(expr_is_missing(field, cattrs));
-            quote! {
-                self.place.#member = #default;
-            }
-        } else {
-            let value_if_none = expr_is_missing_seq(Some(quote!(self.place.#member = )), index_in_seq, field, cattrs, expecting);
-            let write = match field.attrs.deserialize_with() {
-                None => {
-                    quote! {
-                        if let _serde::__private::None = _serde::de::SeqAccess::next_element_seed(&mut __seq,
-                            _serde::__private::de::InPlaceSeed(&mut self.place.#member))?
-                        {
-                            #value_if_none;
-                        }
-                    }
-                }
-                Some(path) => {
-                    let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
-                    quote!({
-                        #wrapper
-                        match _serde::de::SeqAccess::next_element::<#wrapper_ty>(&mut __seq)? {
-                            _serde::__private::Some(__wrap) => {
-                                self.place.#member = __wrap.value;
-                            }
-                            _serde::__private::None => {
-                                #value_if_none;
-                            }
-                        }
-                    })
-                }
-            };
-            index_in_seq += 1;
-            write
-        }
-    });
-
-    let this_type = &params.this_type;
-    let (_, ty_generics, _) = params.generics.split_for_impl();
-    let let_default = match cattrs.default() {
-        attr::Default::Default => Some(quote!(
-            let __default: #this_type #ty_generics = _serde::__private::Default::default();
-        )),
-        attr::Default::Path(path) => Some(quote!(
-            let __default: #this_type #ty_generics = #path();
-        )),
-        attr::Default::None => {
-            // We don't need the default value, to prevent an unused variable warning
-            // we'll leave the line empty.
-            None
-        }
-    };
-
-    quote_block! {
-        #let_default
-        #(#write_values)*
-        _serde::__private::Ok(())
-    }
-}
-
-fn deserialize_newtype_struct(
-    type_path: &TokenStream,
-    params: &Parameters,
-    field: &Field,
-) -> TokenStream {
-    let delife = params.borrowed.de_lifetime();
-    let field_ty = field.ty;
-
-    let value = match field.attrs.deserialize_with() {
-        None => {
-            let span = field.original.span();
-            let func = quote_spanned!(span=> <#field_ty as _serde::Deserialize>::deserialize);
-            quote! {
-                #func(__e)?
-            }
-        }
-        Some(path) => {
-            quote! {
-                #path(__e)?
-            }
-        }
-    };
-
-    let mut result = quote!(#type_path(__field0));
-    if params.has_getter {
-        let this_type = &params.this_type;
-        let (_, ty_generics, _) = params.generics.split_for_impl();
-        result = quote! {
-            _serde::__private::Into::<#this_type #ty_generics>::into(#result)
-        };
-    }
-
-    quote! {
-        #[inline]
-        fn visit_newtype_struct<__E>(self, __e: __E) -> _serde::__private::Result<Self::Value, __E::Error>
-        where
-            __E: _serde::Deserializer<#delife>,
-        {
-            let __field0: #field_ty = #value;
-            _serde::__private::Ok(#result)
-        }
-    }
-}
-
-enum StructForm<'a> {
-    Struct,
-    /// Contains a variant name
-    ExternallyTagged(&'a syn::Ident),
-    /// Contains a variant name and an intermediate deserializer from which actual
-    /// deserialization will be performed
-    InternallyTagged(&'a syn::Ident, TokenStream),
-    /// Contains a variant name and an intermediate deserializer from which actual
-    /// deserialization will be performed
-    Untagged(&'a syn::Ident, TokenStream),
-}
-
-fn deserialize_struct(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-    form: StructForm,
-) -> Fragment {
-    let this_type = &params.this_type;
-    let this_value = &params.this_value;
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-
-    // If there are getters (implying private fields), construct the local type
-    // and use an `Into` conversion to get the remote type. If there are no
-    // getters then construct the target type directly.
-    let construct = if params.has_getter {
-        let local = &params.local;
-        quote!(#local)
-    } else {
-        quote!(#this_value)
-    };
-
-    let type_path = match form {
-        StructForm::Struct => construct,
-        StructForm::ExternallyTagged(variant_ident)
-        | StructForm::InternallyTagged(variant_ident, _)
-        | StructForm::Untagged(variant_ident, _) => quote!(#construct::#variant_ident),
-    };
-    let expecting = match form {
-        StructForm::Struct => format!("struct {}", params.type_name()),
-        StructForm::ExternallyTagged(variant_ident)
-        | StructForm::InternallyTagged(variant_ident, _)
-        | StructForm::Untagged(variant_ident, _) => {
-            format!("struct variant {}::{}", params.type_name(), variant_ident)
-        }
-    };
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    let field_names_idents: Vec<_> = fields
-        .iter()
-        .enumerate()
-        // Skip fields that shouldn't be deserialized or that were flattened,
-        // so they don't appear in the storage in their literal form
-        .filter(|&(_, field)| !field.attrs.skip_deserializing() && !field.attrs.flatten())
-        .map(|(i, field)| {
-            (
-                field.attrs.name().deserialize_name(),
-                field_i(i),
-                field.attrs.aliases(),
-            )
-        })
-        .collect();
-    let field_visitor = deserialize_field_identifier(&field_names_idents, cattrs);
-
-    // untagged struct variants do not get a visit_seq method. The same applies to
-    // structs that only have a map representation.
-    let visit_seq = match form {
-        StructForm::Untagged(..) => None,
-        _ if cattrs.has_flatten() => None,
-        _ => {
-            let mut_seq = if field_names_idents.is_empty() {
-                quote!(_)
-            } else {
-                quote!(mut __seq)
-            };
-
-            let visit_seq = Stmts(deserialize_seq(
-                &type_path, params, fields, true, cattrs, expecting,
-            ));
-
-            Some(quote! {
-                #[inline]
-                fn visit_seq<__A>(self, #mut_seq: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-                where
-                    __A: _serde::de::SeqAccess<#delife>,
-                {
-                    #visit_seq
-                }
-            })
-        }
-    };
-    let visit_map = Stmts(deserialize_map(&type_path, params, fields, cattrs));
-
-    let visitor_seed = match form {
-        StructForm::ExternallyTagged(..) if cattrs.has_flatten() => Some(quote! {
-            impl #de_impl_generics _serde::de::DeserializeSeed<#delife> for __Visitor #de_ty_generics #where_clause {
-                type Value = #this_type #ty_generics;
-
-                fn deserialize<__D>(self, __deserializer: __D) -> _serde::__private::Result<Self::Value, __D::Error>
-                where
-                    __D: _serde::Deserializer<#delife>,
-                {
-                    _serde::Deserializer::deserialize_map(__deserializer, self)
-                }
-            }
-        }),
-        _ => None,
-    };
-
-    let fields_stmt = if cattrs.has_flatten() {
-        None
-    } else {
-        let field_names = field_names_idents
-            .iter()
-            .flat_map(|&(_, _, aliases)| aliases);
-
-        Some(quote! {
-            #[doc(hidden)]
-            const FIELDS: &'static [&'static str] = &[ #(#field_names),* ];
-        })
-    };
-
-    let visitor_expr = quote! {
-        __Visitor {
-            marker: _serde::__private::PhantomData::<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData,
-        }
-    };
-    let dispatch = match form {
-        StructForm::Struct if cattrs.has_flatten() => quote! {
-            _serde::Deserializer::deserialize_map(__deserializer, #visitor_expr)
-        },
-        StructForm::Struct => {
-            let type_name = cattrs.name().deserialize_name();
-            quote! {
-                _serde::Deserializer::deserialize_struct(__deserializer, #type_name, FIELDS, #visitor_expr)
-            }
-        }
-        StructForm::ExternallyTagged(_) if cattrs.has_flatten() => quote! {
-            _serde::de::VariantAccess::newtype_variant_seed(__variant, #visitor_expr)
-        },
-        StructForm::ExternallyTagged(_) => quote! {
-            _serde::de::VariantAccess::struct_variant(__variant, FIELDS, #visitor_expr)
-        },
-        StructForm::InternallyTagged(_, deserializer) => quote! {
-            _serde::Deserializer::deserialize_any(#deserializer, #visitor_expr)
-        },
-        StructForm::Untagged(_, deserializer) => quote! {
-            _serde::Deserializer::deserialize_any(#deserializer, #visitor_expr)
-        },
-    };
-
-    quote_block! {
-        #field_visitor
-
-        #[doc(hidden)]
-        struct __Visitor #de_impl_generics #where_clause {
-            marker: _serde::__private::PhantomData<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
-            type Value = #this_type #ty_generics;
-
-            fn expecting(&self, __formatter: &mut _serde::__private::Formatter) -> _serde::__private::fmt::Result {
-                _serde::__private::Formatter::write_str(__formatter, #expecting)
-            }
-
-            #visit_seq
-
-            #[inline]
-            fn visit_map<__A>(self, mut __map: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-            where
-                __A: _serde::de::MapAccess<#delife>,
-            {
-                #visit_map
-            }
-        }
-
-        #visitor_seed
-
-        #fields_stmt
-
-        #dispatch
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-fn deserialize_struct_in_place(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-) -> Option<Fragment> {
-    // for now we do not support in_place deserialization for structs that
-    // are represented as map.
-    if cattrs.has_flatten() {
-        return None;
-    }
-
-    let this_type = &params.this_type;
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-
-    let expecting = format!("struct {}", params.type_name());
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    let field_names_idents: Vec<_> = fields
-        .iter()
-        .enumerate()
-        .filter(|&(_, field)| !field.attrs.skip_deserializing())
-        .map(|(i, field)| {
-            (
-                field.attrs.name().deserialize_name(),
-                field_i(i),
-                field.attrs.aliases(),
-            )
-        })
-        .collect();
-
-    let field_visitor = deserialize_field_identifier(&field_names_idents, cattrs);
-
-    let mut_seq = if field_names_idents.is_empty() {
-        quote!(_)
-    } else {
-        quote!(mut __seq)
-    };
-    let visit_seq = Stmts(deserialize_seq_in_place(params, fields, cattrs, expecting));
-    let visit_map = Stmts(deserialize_map_in_place(params, fields, cattrs));
-    let field_names = field_names_idents
-        .iter()
-        .flat_map(|&(_, _, aliases)| aliases);
-    let type_name = cattrs.name().deserialize_name();
-
-    let in_place_impl_generics = de_impl_generics.in_place();
-    let in_place_ty_generics = de_ty_generics.in_place();
-    let place_life = place_lifetime();
-
-    Some(quote_block! {
-        #field_visitor
-
-        #[doc(hidden)]
-        struct __Visitor #in_place_impl_generics #where_clause {
-            place: &#place_life mut #this_type #ty_generics,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #in_place_impl_generics _serde::de::Visitor<#delife> for __Visitor #in_place_ty_generics #where_clause {
-            type Value = ();
-
-            fn expecting(&self, __formatter: &mut _serde::__private::Formatter) -> _serde::__private::fmt::Result {
-                _serde::__private::Formatter::write_str(__formatter, #expecting)
-            }
-
-            #[inline]
-            fn visit_seq<__A>(self, #mut_seq: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-            where
-                __A: _serde::de::SeqAccess<#delife>,
-            {
-                #visit_seq
-            }
-
-            #[inline]
-            fn visit_map<__A>(self, mut __map: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-            where
-                __A: _serde::de::MapAccess<#delife>,
-            {
-                #visit_map
-            }
-        }
-
-        #[doc(hidden)]
-        const FIELDS: &'static [&'static str] = &[ #(#field_names),* ];
-
-        _serde::Deserializer::deserialize_struct(__deserializer, #type_name, FIELDS, __Visitor {
-            place: __place,
-            lifetime: _serde::__private::PhantomData,
-        })
-    })
-}
-
-fn deserialize_enum(
-    params: &Parameters,
-    variants: &[Variant],
-    cattrs: &attr::Container,
-) -> Fragment {
-    // The variants have already been checked (in ast.rs) that all untagged variants appear at the end
-    match variants.iter().position(|var| var.attrs.untagged()) {
-        Some(variant_idx) => {
-            let (tagged, untagged) = variants.split_at(variant_idx);
-            let tagged_frag = Expr(deserialize_homogeneous_enum(params, tagged, cattrs));
-            deserialize_untagged_enum_after(params, untagged, cattrs, Some(tagged_frag))
-        }
-        None => deserialize_homogeneous_enum(params, variants, cattrs),
-    }
-}
-
-fn deserialize_homogeneous_enum(
-    params: &Parameters,
-    variants: &[Variant],
-    cattrs: &attr::Container,
-) -> Fragment {
-    match cattrs.tag() {
-        attr::TagType::External => deserialize_externally_tagged_enum(params, variants, cattrs),
-        attr::TagType::Internal { tag } => {
-            deserialize_internally_tagged_enum(params, variants, cattrs, tag)
-        }
-        attr::TagType::Adjacent { tag, content } => {
-            deserialize_adjacently_tagged_enum(params, variants, cattrs, tag, content)
-        }
-        attr::TagType::None => deserialize_untagged_enum(params, variants, cattrs),
-    }
-}
-
-fn prepare_enum_variant_enum(
-    variants: &[Variant],
-    cattrs: &attr::Container,
-) -> (TokenStream, Stmts) {
-    let mut deserialized_variants = variants
-        .iter()
-        .enumerate()
-        .filter(|&(_, variant)| !variant.attrs.skip_deserializing());
-
-    let variant_names_idents: Vec<_> = deserialized_variants
-        .clone()
-        .map(|(i, variant)| {
-            (
-                variant.attrs.name().deserialize_name(),
-                field_i(i),
-                variant.attrs.aliases(),
-            )
-        })
-        .collect();
-
-    let fallthrough = deserialized_variants
-        .position(|(_, variant)| variant.attrs.other())
-        .map(|other_idx| {
-            let ignore_variant = variant_names_idents[other_idx].1.clone();
-            quote!(_serde::__private::Ok(__Field::#ignore_variant))
-        });
-
-    let variants_stmt = {
-        let variant_names = variant_names_idents.iter().map(|(name, _, _)| name);
-        quote! {
-            #[doc(hidden)]
-            const VARIANTS: &'static [&'static str] = &[ #(#variant_names),* ];
-        }
-    };
-
-    let variant_visitor = Stmts(deserialize_generated_identifier(
-        &variant_names_idents,
-        cattrs,
-        true,
-        None,
-        fallthrough,
-    ));
-
-    (variants_stmt, variant_visitor)
-}
-
-fn deserialize_externally_tagged_enum(
-    params: &Parameters,
-    variants: &[Variant],
-    cattrs: &attr::Container,
-) -> Fragment {
-    let this_type = &params.this_type;
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-
-    let type_name = cattrs.name().deserialize_name();
-    let expecting = format!("enum {}", params.type_name());
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    let (variants_stmt, variant_visitor) = prepare_enum_variant_enum(variants, cattrs);
-
-    // Match arms to extract a variant from a string
-    let variant_arms = variants
-        .iter()
-        .enumerate()
-        .filter(|&(_, variant)| !variant.attrs.skip_deserializing())
-        .map(|(i, variant)| {
-            let variant_name = field_i(i);
-
-            let block = Match(deserialize_externally_tagged_variant(
-                params, variant, cattrs,
-            ));
-
-            quote! {
-                (__Field::#variant_name, __variant) => #block
-            }
-        });
-
-    let all_skipped = variants
-        .iter()
-        .all(|variant| variant.attrs.skip_deserializing());
-    let match_variant = if all_skipped {
-        // This is an empty enum like `enum Impossible {}` or an enum in which
-        // all variants have `#[serde(skip_deserializing)]`.
-        quote! {
-            // FIXME: Once feature(exhaustive_patterns) is stable:
-            // let _serde::__private::Err(__err) = _serde::de::EnumAccess::variant::<__Field>(__data);
-            // _serde::__private::Err(__err)
-            _serde::__private::Result::map(
-                _serde::de::EnumAccess::variant::<__Field>(__data),
-                |(__impossible, _)| match __impossible {})
-        }
-    } else {
-        quote! {
-            match _serde::de::EnumAccess::variant(__data)? {
-                #(#variant_arms)*
-            }
-        }
-    };
-
-    quote_block! {
-        #variant_visitor
-
-        #[doc(hidden)]
-        struct __Visitor #de_impl_generics #where_clause {
-            marker: _serde::__private::PhantomData<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
-            type Value = #this_type #ty_generics;
-
-            fn expecting(&self, __formatter: &mut _serde::__private::Formatter) -> _serde::__private::fmt::Result {
-                _serde::__private::Formatter::write_str(__formatter, #expecting)
-            }
-
-            fn visit_enum<__A>(self, __data: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-            where
-                __A: _serde::de::EnumAccess<#delife>,
-            {
-                #match_variant
-            }
-        }
-
-        #variants_stmt
-
-        _serde::Deserializer::deserialize_enum(
-            __deserializer,
-            #type_name,
-            VARIANTS,
-            __Visitor {
-                marker: _serde::__private::PhantomData::<#this_type #ty_generics>,
-                lifetime: _serde::__private::PhantomData,
-            },
-        )
-    }
-}
-
-fn deserialize_internally_tagged_enum(
-    params: &Parameters,
-    variants: &[Variant],
-    cattrs: &attr::Container,
-    tag: &str,
-) -> Fragment {
-    let (variants_stmt, variant_visitor) = prepare_enum_variant_enum(variants, cattrs);
-
-    // Match arms to extract a variant from a string
-    let variant_arms = variants
-        .iter()
-        .enumerate()
-        .filter(|&(_, variant)| !variant.attrs.skip_deserializing())
-        .map(|(i, variant)| {
-            let variant_name = field_i(i);
-
-            let block = Match(deserialize_internally_tagged_variant(
-                params,
-                variant,
-                cattrs,
-                quote!(__deserializer),
-            ));
-
-            quote! {
-                __Field::#variant_name => #block
-            }
-        });
-
-    let expecting = format!("internally tagged enum {}", params.type_name());
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-
-    quote_block! {
-        #variant_visitor
-
-        #variants_stmt
-
-        let (__tag, __content) = _serde::Deserializer::deserialize_any(
-            __deserializer,
-            _serde::__private::de::TaggedContentVisitor::<__Field>::new(#tag, #expecting))?;
-        let __deserializer = _serde::__private::de::ContentDeserializer::<__D::Error>::new(__content);
-
-        match __tag {
-            #(#variant_arms)*
-        }
-    }
-}
-
-fn deserialize_adjacently_tagged_enum(
-    params: &Parameters,
-    variants: &[Variant],
-    cattrs: &attr::Container,
-    tag: &str,
-    content: &str,
-) -> Fragment {
-    let this_type = &params.this_type;
-    let this_value = &params.this_value;
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-
-    let (variants_stmt, variant_visitor) = prepare_enum_variant_enum(variants, cattrs);
-
-    let variant_arms: &Vec<_> = &variants
-        .iter()
-        .enumerate()
-        .filter(|&(_, variant)| !variant.attrs.skip_deserializing())
-        .map(|(i, variant)| {
-            let variant_index = field_i(i);
-
-            let block = Match(deserialize_untagged_variant(
-                params,
-                variant,
-                cattrs,
-                quote!(__deserializer),
-            ));
-
-            quote! {
-                __Field::#variant_index => #block
-            }
-        })
-        .collect();
-
-    let rust_name = params.type_name();
-    let expecting = format!("adjacently tagged enum {}", rust_name);
-    let expecting = cattrs.expecting().unwrap_or(&expecting);
-    let type_name = cattrs.name().deserialize_name();
-    let deny_unknown_fields = cattrs.deny_unknown_fields();
-
-    // If unknown fields are allowed, we pick the visitor that can step over
-    // those. Otherwise we pick the visitor that fails on unknown keys.
-    let field_visitor_ty = if deny_unknown_fields {
-        quote! { _serde::__private::de::TagOrContentFieldVisitor }
-    } else {
-        quote! { _serde::__private::de::TagContentOtherFieldVisitor }
-    };
-
-    let tag_or_content = quote! {
-        #field_visitor_ty {
-            tag: #tag,
-            content: #content,
-        }
-    };
-
-    let variant_seed = quote! {
-        _serde::__private::de::AdjacentlyTaggedEnumVariantSeed::<__Field> {
-            enum_name: #rust_name,
-            variants: VARIANTS,
-            fields_enum: _serde::__private::PhantomData
-        }
-    };
-
-    let mut missing_content = quote! {
-        _serde::__private::Err(<__A::Error as _serde::de::Error>::missing_field(#content))
-    };
-    let mut missing_content_fallthrough = quote!();
-    let missing_content_arms = variants
-        .iter()
-        .enumerate()
-        .filter(|&(_, variant)| !variant.attrs.skip_deserializing())
-        .filter_map(|(i, variant)| {
-            let variant_index = field_i(i);
-            let variant_ident = &variant.ident;
-
-            let arm = match variant.style {
-                Style::Unit => quote! {
-                    _serde::__private::Ok(#this_value::#variant_ident)
-                },
-                Style::Newtype if variant.attrs.deserialize_with().is_none() => {
-                    let span = variant.original.span();
-                    let func = quote_spanned!(span=> _serde::__private::de::missing_field);
-                    quote! {
-                        #func(#content).map(#this_value::#variant_ident)
-                    }
-                }
-                _ => {
-                    missing_content_fallthrough = quote!(_ => #missing_content);
-                    return None;
-                }
-            };
-            Some(quote! {
-                __Field::#variant_index => #arm,
-            })
-        })
-        .collect::<Vec<_>>();
-    if !missing_content_arms.is_empty() {
-        missing_content = quote! {
-            match __field {
-                #(#missing_content_arms)*
-                #missing_content_fallthrough
-            }
-        };
-    }
-
-    // Advance the map by one key, returning early in case of error.
-    let next_key = quote! {
-        _serde::de::MapAccess::next_key_seed(&mut __map, #tag_or_content)?
-    };
-
-    let variant_from_map = quote! {
-        _serde::de::MapAccess::next_value_seed(&mut __map, #variant_seed)?
-    };
-
-    // When allowing unknown fields, we want to transparently step through keys
-    // we don't care about until we find `tag`, `content`, or run out of keys.
-    let next_relevant_key = if deny_unknown_fields {
-        next_key
-    } else {
-        quote!({
-            let mut __rk : _serde::__private::Option<_serde::__private::de::TagOrContentField> = _serde::__private::None;
-            while let _serde::__private::Some(__k) = #next_key {
-                match __k {
-                    _serde::__private::de::TagContentOtherField::Other => {
-                        let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?;
-                        continue;
-                    },
-                    _serde::__private::de::TagContentOtherField::Tag => {
-                        __rk = _serde::__private::Some(_serde::__private::de::TagOrContentField::Tag);
-                        break;
-                    }
-                    _serde::__private::de::TagContentOtherField::Content => {
-                        __rk = _serde::__private::Some(_serde::__private::de::TagOrContentField::Content);
-                        break;
-                    }
-                }
-            }
-
-            __rk
-        })
-    };
-
-    // Step through remaining keys, looking for duplicates of previously-seen
-    // keys. When unknown fields are denied, any key that isn't a duplicate will
-    // at this point immediately produce an error.
-    let visit_remaining_keys = quote! {
-        match #next_relevant_key {
-            _serde::__private::Some(_serde::__private::de::TagOrContentField::Tag) => {
-                _serde::__private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#tag))
-            }
-            _serde::__private::Some(_serde::__private::de::TagOrContentField::Content) => {
-                _serde::__private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#content))
-            }
-            _serde::__private::None => _serde::__private::Ok(__ret),
-        }
-    };
-
-    let finish_content_then_tag = if variant_arms.is_empty() {
-        quote! {
-            match #variant_from_map {}
-        }
-    } else {
-        quote! {
-            let __ret = match #variant_from_map {
-                // Deserialize the buffered content now that we know the variant.
-                #(#variant_arms)*
-            }?;
-            // Visit remaining keys, looking for duplicates.
-            #visit_remaining_keys
-        }
-    };
-
-    quote_block! {
-        #variant_visitor
-
-        #variants_stmt
-
-        #[doc(hidden)]
-        struct __Seed #de_impl_generics #where_clause {
-            field: __Field,
-            marker: _serde::__private::PhantomData<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #de_impl_generics _serde::de::DeserializeSeed<#delife> for __Seed #de_ty_generics #where_clause {
-            type Value = #this_type #ty_generics;
-
-            fn deserialize<__D>(self, __deserializer: __D) -> _serde::__private::Result<Self::Value, __D::Error>
-            where
-                __D: _serde::Deserializer<#delife>,
-            {
-                match self.field {
-                    #(#variant_arms)*
-                }
-            }
-        }
-
-        #[doc(hidden)]
-        struct __Visitor #de_impl_generics #where_clause {
-            marker: _serde::__private::PhantomData<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
-            type Value = #this_type #ty_generics;
-
-            fn expecting(&self, __formatter: &mut _serde::__private::Formatter) -> _serde::__private::fmt::Result {
-                _serde::__private::Formatter::write_str(__formatter, #expecting)
-            }
-
-            fn visit_map<__A>(self, mut __map: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-            where
-                __A: _serde::de::MapAccess<#delife>,
-            {
-                // Visit the first relevant key.
-                match #next_relevant_key {
-                    // First key is the tag.
-                    _serde::__private::Some(_serde::__private::de::TagOrContentField::Tag) => {
-                        // Parse the tag.
-                        let __field = #variant_from_map;
-                        // Visit the second key.
-                        match #next_relevant_key {
-                            // Second key is a duplicate of the tag.
-                            _serde::__private::Some(_serde::__private::de::TagOrContentField::Tag) => {
-                                _serde::__private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#tag))
-                            }
-                            // Second key is the content.
-                            _serde::__private::Some(_serde::__private::de::TagOrContentField::Content) => {
-                                let __ret = _serde::de::MapAccess::next_value_seed(&mut __map,
-                                    __Seed {
-                                        field: __field,
-                                        marker: _serde::__private::PhantomData,
-                                        lifetime: _serde::__private::PhantomData,
-                                    })?;
-                                // Visit remaining keys, looking for duplicates.
-                                #visit_remaining_keys
-                            }
-                            // There is no second key; might be okay if the we have a unit variant.
-                            _serde::__private::None => #missing_content
-                        }
-                    }
-                    // First key is the content.
-                    _serde::__private::Some(_serde::__private::de::TagOrContentField::Content) => {
-                        // Buffer up the content.
-                        let __content = _serde::de::MapAccess::next_value::<_serde::__private::de::Content>(&mut __map)?;
-                        // Visit the second key.
-                        match #next_relevant_key {
-                            // Second key is the tag.
-                            _serde::__private::Some(_serde::__private::de::TagOrContentField::Tag) => {
-                                let __deserializer = _serde::__private::de::ContentDeserializer::<__A::Error>::new(__content);
-                                #finish_content_then_tag
-                            }
-                            // Second key is a duplicate of the content.
-                            _serde::__private::Some(_serde::__private::de::TagOrContentField::Content) => {
-                                _serde::__private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#content))
-                            }
-                            // There is no second key.
-                            _serde::__private::None => {
-                                _serde::__private::Err(<__A::Error as _serde::de::Error>::missing_field(#tag))
-                            }
-                        }
-                    }
-                    // There is no first key.
-                    _serde::__private::None => {
-                        _serde::__private::Err(<__A::Error as _serde::de::Error>::missing_field(#tag))
-                    }
-                }
-            }
-
-            fn visit_seq<__A>(self, mut __seq: __A) -> _serde::__private::Result<Self::Value, __A::Error>
-            where
-                __A: _serde::de::SeqAccess<#delife>,
-            {
-                // Visit the first element - the tag.
-                match _serde::de::SeqAccess::next_element(&mut __seq)? {
-                    _serde::__private::Some(__field) => {
-                        // Visit the second element - the content.
-                        match _serde::de::SeqAccess::next_element_seed(
-                            &mut __seq,
-                            __Seed {
-                                field: __field,
-                                marker: _serde::__private::PhantomData,
-                                lifetime: _serde::__private::PhantomData,
-                            },
-                        )? {
-                            _serde::__private::Some(__ret) => _serde::__private::Ok(__ret),
-                            // There is no second element.
-                            _serde::__private::None => {
-                                _serde::__private::Err(_serde::de::Error::invalid_length(1, &self))
-                            }
-                        }
-                    }
-                    // There is no first element.
-                    _serde::__private::None => {
-                        _serde::__private::Err(_serde::de::Error::invalid_length(0, &self))
-                    }
-                }
-            }
-        }
-
-        #[doc(hidden)]
-        const FIELDS: &'static [&'static str] = &[#tag, #content];
-        _serde::Deserializer::deserialize_struct(
-            __deserializer,
-            #type_name,
-            FIELDS,
-            __Visitor {
-                marker: _serde::__private::PhantomData::<#this_type #ty_generics>,
-                lifetime: _serde::__private::PhantomData,
-            },
-        )
-    }
-}
-
-fn deserialize_untagged_enum(
-    params: &Parameters,
-    variants: &[Variant],
-    cattrs: &attr::Container,
-) -> Fragment {
-    let first_attempt = None;
-    deserialize_untagged_enum_after(params, variants, cattrs, first_attempt)
-}
-
-fn deserialize_untagged_enum_after(
-    params: &Parameters,
-    variants: &[Variant],
-    cattrs: &attr::Container,
-    first_attempt: Option<Expr>,
-) -> Fragment {
-    let attempts = variants
-        .iter()
-        .filter(|variant| !variant.attrs.skip_deserializing())
-        .map(|variant| {
-            Expr(deserialize_untagged_variant(
-                params,
-                variant,
-                cattrs,
-                quote!(__deserializer),
-            ))
-        });
-    // TODO this message could be better by saving the errors from the failed
-    // attempts. The heuristic used by TOML was to count the number of fields
-    // processed before an error, and use the error that happened after the
-    // largest number of fields. I'm not sure I like that. Maybe it would be
-    // better to save all the errors and combine them into one message that
-    // explains why none of the variants matched.
-    let fallthrough_msg = format!(
-        "data did not match any variant of untagged enum {}",
-        params.type_name()
-    );
-    let fallthrough_msg = cattrs.expecting().unwrap_or(&fallthrough_msg);
-
-    // Ignore any error associated with non-untagged deserialization so that we
-    // can fall through to the untagged variants. This may be infallible so we
-    // need to provide the error type.
-    let first_attempt = first_attempt.map(|expr| {
-        quote! {
-            if let _serde::__private::Result::<_, __D::Error>::Ok(__ok) = (|| #expr)() {
-                return _serde::__private::Ok(__ok);
-            }
-        }
-    });
-
-    quote_block! {
-        let __content = <_serde::__private::de::Content as _serde::Deserialize>::deserialize(__deserializer)?;
-        let __deserializer = _serde::__private::de::ContentRefDeserializer::<__D::Error>::new(&__content);
-
-        #first_attempt
-
-        #(
-            if let _serde::__private::Ok(__ok) = #attempts {
-                return _serde::__private::Ok(__ok);
-            }
-        )*
-
-        _serde::__private::Err(_serde::de::Error::custom(#fallthrough_msg))
-    }
-}
-
-fn deserialize_externally_tagged_variant(
-    params: &Parameters,
-    variant: &Variant,
-    cattrs: &attr::Container,
-) -> Fragment {
-    if let Some(path) = variant.attrs.deserialize_with() {
-        let (wrapper, wrapper_ty, unwrap_fn) = wrap_deserialize_variant_with(params, variant, path);
-        return quote_block! {
-            #wrapper
-            _serde::__private::Result::map(
-                _serde::de::VariantAccess::newtype_variant::<#wrapper_ty>(__variant), #unwrap_fn)
-        };
-    }
-
-    let variant_ident = &variant.ident;
-
-    match variant.style {
-        Style::Unit => {
-            let this_value = &params.this_value;
-            quote_block! {
-                _serde::de::VariantAccess::unit_variant(__variant)?;
-                _serde::__private::Ok(#this_value::#variant_ident)
-            }
-        }
-        Style::Newtype => deserialize_externally_tagged_newtype_variant(
-            variant_ident,
-            params,
-            &variant.fields[0],
-            cattrs,
-        ),
-        Style::Tuple => deserialize_tuple(
-            params,
-            &variant.fields,
-            cattrs,
-            TupleForm::ExternallyTagged(variant_ident),
-        ),
-        Style::Struct => deserialize_struct(
-            params,
-            &variant.fields,
-            cattrs,
-            StructForm::ExternallyTagged(variant_ident),
-        ),
-    }
-}
-
-// Generates significant part of the visit_seq and visit_map bodies of visitors
-// for the variants of internally tagged enum.
-fn deserialize_internally_tagged_variant(
-    params: &Parameters,
-    variant: &Variant,
-    cattrs: &attr::Container,
-    deserializer: TokenStream,
-) -> Fragment {
-    if variant.attrs.deserialize_with().is_some() {
-        return deserialize_untagged_variant(params, variant, cattrs, deserializer);
-    }
-
-    let variant_ident = &variant.ident;
-
-    match effective_style(variant) {
-        Style::Unit => {
-            let this_value = &params.this_value;
-            let type_name = params.type_name();
-            let variant_name = variant.ident.to_string();
-            let default = variant.fields.first().map(|field| {
-                let default = Expr(expr_is_missing(field, cattrs));
-                quote!((#default))
-            });
-            quote_block! {
-                _serde::Deserializer::deserialize_any(#deserializer, _serde::__private::de::InternallyTaggedUnitVisitor::new(#type_name, #variant_name))?;
-                _serde::__private::Ok(#this_value::#variant_ident #default)
-            }
-        }
-        Style::Newtype => deserialize_untagged_newtype_variant(
-            variant_ident,
-            params,
-            &variant.fields[0],
-            &deserializer,
-        ),
-        Style::Struct => deserialize_struct(
-            params,
-            &variant.fields,
-            cattrs,
-            StructForm::InternallyTagged(variant_ident, deserializer),
-        ),
-        Style::Tuple => unreachable!("checked in serde_derive_internals"),
-    }
-}
-
-fn deserialize_untagged_variant(
-    params: &Parameters,
-    variant: &Variant,
-    cattrs: &attr::Container,
-    deserializer: TokenStream,
-) -> Fragment {
-    if let Some(path) = variant.attrs.deserialize_with() {
-        let unwrap_fn = unwrap_to_variant_closure(params, variant, false);
-        return quote_block! {
-            _serde::__private::Result::map(#path(#deserializer), #unwrap_fn)
-        };
-    }
-
-    let variant_ident = &variant.ident;
-
-    match effective_style(variant) {
-        Style::Unit => {
-            let this_value = &params.this_value;
-            let type_name = params.type_name();
-            let variant_name = variant.ident.to_string();
-            let default = variant.fields.first().map(|field| {
-                let default = Expr(expr_is_missing(field, cattrs));
-                quote!((#default))
-            });
-            quote_expr! {
-                match _serde::Deserializer::deserialize_any(
-                    #deserializer,
-                    _serde::__private::de::UntaggedUnitVisitor::new(#type_name, #variant_name)
-                ) {
-                    _serde::__private::Ok(()) => _serde::__private::Ok(#this_value::#variant_ident #default),
-                    _serde::__private::Err(__err) => _serde::__private::Err(__err),
-                }
-            }
-        }
-        Style::Newtype => deserialize_untagged_newtype_variant(
-            variant_ident,
-            params,
-            &variant.fields[0],
-            &deserializer,
-        ),
-        Style::Tuple => deserialize_tuple(
-            params,
-            &variant.fields,
-            cattrs,
-            TupleForm::Untagged(variant_ident, deserializer),
-        ),
-        Style::Struct => deserialize_struct(
-            params,
-            &variant.fields,
-            cattrs,
-            StructForm::Untagged(variant_ident, deserializer),
-        ),
-    }
-}
-
-fn deserialize_externally_tagged_newtype_variant(
-    variant_ident: &syn::Ident,
-    params: &Parameters,
-    field: &Field,
-    cattrs: &attr::Container,
-) -> Fragment {
-    let this_value = &params.this_value;
-
-    if field.attrs.skip_deserializing() {
-        let default = Expr(expr_is_missing(field, cattrs));
-        return quote_block! {
-            _serde::de::VariantAccess::unit_variant(__variant)?;
-            _serde::__private::Ok(#this_value::#variant_ident(#default))
-        };
-    }
-
-    match field.attrs.deserialize_with() {
-        None => {
-            let field_ty = field.ty;
-            let span = field.original.span();
-            let func =
-                quote_spanned!(span=> _serde::de::VariantAccess::newtype_variant::<#field_ty>);
-            quote_expr! {
-                _serde::__private::Result::map(#func(__variant), #this_value::#variant_ident)
-            }
-        }
-        Some(path) => {
-            let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
-            quote_block! {
-                #wrapper
-                _serde::__private::Result::map(
-                    _serde::de::VariantAccess::newtype_variant::<#wrapper_ty>(__variant),
-                    |__wrapper| #this_value::#variant_ident(__wrapper.value))
-            }
-        }
-    }
-}
-
-fn deserialize_untagged_newtype_variant(
-    variant_ident: &syn::Ident,
-    params: &Parameters,
-    field: &Field,
-    deserializer: &TokenStream,
-) -> Fragment {
-    let this_value = &params.this_value;
-    let field_ty = field.ty;
-    match field.attrs.deserialize_with() {
-        None => {
-            let span = field.original.span();
-            let func = quote_spanned!(span=> <#field_ty as _serde::Deserialize>::deserialize);
-            quote_expr! {
-                _serde::__private::Result::map(#func(#deserializer), #this_value::#variant_ident)
-            }
-        }
-        Some(path) => {
-            quote_block! {
-                let __value: _serde::__private::Result<#field_ty, _> = #path(#deserializer);
-                _serde::__private::Result::map(__value, #this_value::#variant_ident)
-            }
-        }
-    }
-}
-
-fn deserialize_generated_identifier(
-    fields: &[(&str, Ident, &BTreeSet<String>)],
-    cattrs: &attr::Container,
-    is_variant: bool,
-    ignore_variant: Option<TokenStream>,
-    fallthrough: Option<TokenStream>,
-) -> Fragment {
-    let this_value = quote!(__Field);
-    let field_idents: &Vec<_> = &fields.iter().map(|(_, ident, _)| ident).collect();
-
-    let visitor_impl = Stmts(deserialize_identifier(
-        &this_value,
-        fields,
-        is_variant,
-        fallthrough,
-        None,
-        !is_variant && cattrs.has_flatten(),
-        None,
-    ));
-
-    let lifetime = if !is_variant && cattrs.has_flatten() {
-        Some(quote!(<'de>))
-    } else {
-        None
-    };
-
-    quote_block! {
-        #[allow(non_camel_case_types)]
-        #[doc(hidden)]
-        enum __Field #lifetime {
-            #(#field_idents,)*
-            #ignore_variant
-        }
-
-        #[doc(hidden)]
-        struct __FieldVisitor;
-
-        impl<'de> _serde::de::Visitor<'de> for __FieldVisitor {
-            type Value = __Field #lifetime;
-
-            #visitor_impl
-        }
-
-        impl<'de> _serde::Deserialize<'de> for __Field #lifetime {
-            #[inline]
-            fn deserialize<__D>(__deserializer: __D) -> _serde::__private::Result<Self, __D::Error>
-            where
-                __D: _serde::Deserializer<'de>,
-            {
-                _serde::Deserializer::deserialize_identifier(__deserializer, __FieldVisitor)
-            }
-        }
-    }
-}
-
-/// Generates enum and its `Deserialize` implementation that represents each
-/// non-skipped field of the struct
-fn deserialize_field_identifier(
-    fields: &[(&str, Ident, &BTreeSet<String>)],
-    cattrs: &attr::Container,
-) -> Stmts {
-    let (ignore_variant, fallthrough) = if cattrs.has_flatten() {
-        let ignore_variant = quote!(__other(_serde::__private::de::Content<'de>),);
-        let fallthrough = quote!(_serde::__private::Ok(__Field::__other(__value)));
-        (Some(ignore_variant), Some(fallthrough))
-    } else if cattrs.deny_unknown_fields() {
-        (None, None)
-    } else {
-        let ignore_variant = quote!(__ignore,);
-        let fallthrough = quote!(_serde::__private::Ok(__Field::__ignore));
-        (Some(ignore_variant), Some(fallthrough))
-    };
-
-    Stmts(deserialize_generated_identifier(
-        fields,
-        cattrs,
-        false,
-        ignore_variant,
-        fallthrough,
-    ))
-}
-
-// Generates `Deserialize::deserialize` body for an enum with
-// `serde(field_identifier)` or `serde(variant_identifier)` attribute.
-fn deserialize_custom_identifier(
-    params: &Parameters,
-    variants: &[Variant],
-    cattrs: &attr::Container,
-) -> Fragment {
-    let is_variant = match cattrs.identifier() {
-        attr::Identifier::Variant => true,
-        attr::Identifier::Field => false,
-        attr::Identifier::No => unreachable!(),
-    };
-
-    let this_type = params.this_type.to_token_stream();
-    let this_value = params.this_value.to_token_stream();
-
-    let (ordinary, fallthrough, fallthrough_borrowed) = if let Some(last) = variants.last() {
-        let last_ident = &last.ident;
-        if last.attrs.other() {
-            // Process `serde(other)` attribute. It would always be found on the
-            // last variant (checked in `check_identifier`), so all preceding
-            // are ordinary variants.
-            let ordinary = &variants[..variants.len() - 1];
-            let fallthrough = quote!(_serde::__private::Ok(#this_value::#last_ident));
-            (ordinary, Some(fallthrough), None)
-        } else if let Style::Newtype = last.style {
-            let ordinary = &variants[..variants.len() - 1];
-            let fallthrough = |value| {
-                quote! {
-                    _serde::__private::Result::map(
-                        _serde::Deserialize::deserialize(
-                            _serde::__private::de::IdentifierDeserializer::from(#value)
-                        ),
-                        #this_value::#last_ident)
-                }
-            };
-            (
-                ordinary,
-                Some(fallthrough(quote!(__value))),
-                Some(fallthrough(quote!(_serde::__private::de::Borrowed(
-                    __value
-                )))),
-            )
-        } else {
-            (variants, None, None)
-        }
-    } else {
-        (variants, None, None)
-    };
-
-    let names_idents: Vec<_> = ordinary
-        .iter()
-        .map(|variant| {
-            (
-                variant.attrs.name().deserialize_name(),
-                variant.ident.clone(),
-                variant.attrs.aliases(),
-            )
-        })
-        .collect();
-
-    let names = names_idents.iter().flat_map(|&(_, _, aliases)| aliases);
-
-    let names_const = if fallthrough.is_some() {
-        None
-    } else if is_variant {
-        let variants = quote! {
-            #[doc(hidden)]
-            const VARIANTS: &'static [&'static str] = &[ #(#names),* ];
-        };
-        Some(variants)
-    } else {
-        let fields = quote! {
-            #[doc(hidden)]
-            const FIELDS: &'static [&'static str] = &[ #(#names),* ];
-        };
-        Some(fields)
-    };
-
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-    let visitor_impl = Stmts(deserialize_identifier(
-        &this_value,
-        &names_idents,
-        is_variant,
-        fallthrough,
-        fallthrough_borrowed,
-        false,
-        cattrs.expecting(),
-    ));
-
-    quote_block! {
-        #names_const
-
-        #[doc(hidden)]
-        struct __FieldVisitor #de_impl_generics #where_clause {
-            marker: _serde::__private::PhantomData<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #de_impl_generics _serde::de::Visitor<#delife> for __FieldVisitor #de_ty_generics #where_clause {
-            type Value = #this_type #ty_generics;
-
-            #visitor_impl
-        }
-
-        let __visitor = __FieldVisitor {
-            marker: _serde::__private::PhantomData::<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData,
-        };
-        _serde::Deserializer::deserialize_identifier(__deserializer, __visitor)
-    }
-}
-
-fn deserialize_identifier(
-    this_value: &TokenStream,
-    fields: &[(&str, Ident, &BTreeSet<String>)],
-    is_variant: bool,
-    fallthrough: Option<TokenStream>,
-    fallthrough_borrowed: Option<TokenStream>,
-    collect_other_fields: bool,
-    expecting: Option<&str>,
-) -> Fragment {
-    let str_mapping = fields.iter().map(|(_, ident, aliases)| {
-        // `aliases` also contains a main name
-        quote!(#(#aliases)|* => _serde::__private::Ok(#this_value::#ident))
-    });
-    let bytes_mapping = fields.iter().map(|(_, ident, aliases)| {
-        // `aliases` also contains a main name
-        let aliases = aliases
-            .iter()
-            .map(|alias| Literal::byte_string(alias.as_bytes()));
-        quote!(#(#aliases)|* => _serde::__private::Ok(#this_value::#ident))
-    });
-
-    let expecting = expecting.unwrap_or(if is_variant {
-        "variant identifier"
-    } else {
-        "field identifier"
-    });
-
-    let bytes_to_str = if fallthrough.is_some() || collect_other_fields {
-        None
-    } else {
-        Some(quote! {
-            let __value = &_serde::__private::from_utf8_lossy(__value);
-        })
-    };
-
-    let (
-        value_as_str_content,
-        value_as_borrowed_str_content,
-        value_as_bytes_content,
-        value_as_borrowed_bytes_content,
-    ) = if collect_other_fields {
-        (
-            Some(quote! {
-                let __value = _serde::__private::de::Content::String(_serde::__private::ToString::to_string(__value));
-            }),
-            Some(quote! {
-                let __value = _serde::__private::de::Content::Str(__value);
-            }),
-            Some(quote! {
-                let __value = _serde::__private::de::Content::ByteBuf(__value.to_vec());
-            }),
-            Some(quote! {
-                let __value = _serde::__private::de::Content::Bytes(__value);
-            }),
-        )
-    } else {
-        (None, None, None, None)
-    };
-
-    let fallthrough_arm_tokens;
-    let fallthrough_arm = if let Some(fallthrough) = &fallthrough {
-        fallthrough
-    } else if is_variant {
-        fallthrough_arm_tokens = quote! {
-            _serde::__private::Err(_serde::de::Error::unknown_variant(__value, VARIANTS))
-        };
-        &fallthrough_arm_tokens
-    } else {
-        fallthrough_arm_tokens = quote! {
-            _serde::__private::Err(_serde::de::Error::unknown_field(__value, FIELDS))
-        };
-        &fallthrough_arm_tokens
-    };
-
-    let visit_other = if collect_other_fields {
-        quote! {
-            fn visit_bool<__E>(self, __value: bool) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::Bool(__value)))
-            }
-
-            fn visit_i8<__E>(self, __value: i8) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::I8(__value)))
-            }
-
-            fn visit_i16<__E>(self, __value: i16) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::I16(__value)))
-            }
-
-            fn visit_i32<__E>(self, __value: i32) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::I32(__value)))
-            }
-
-            fn visit_i64<__E>(self, __value: i64) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::I64(__value)))
-            }
-
-            fn visit_u8<__E>(self, __value: u8) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::U8(__value)))
-            }
-
-            fn visit_u16<__E>(self, __value: u16) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::U16(__value)))
-            }
-
-            fn visit_u32<__E>(self, __value: u32) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::U32(__value)))
-            }
-
-            fn visit_u64<__E>(self, __value: u64) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::U64(__value)))
-            }
-
-            fn visit_f32<__E>(self, __value: f32) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::F32(__value)))
-            }
-
-            fn visit_f64<__E>(self, __value: f64) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::F64(__value)))
-            }
-
-            fn visit_char<__E>(self, __value: char) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::Char(__value)))
-            }
-
-            fn visit_unit<__E>(self) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                _serde::__private::Ok(__Field::__other(_serde::__private::de::Content::Unit))
-            }
-        }
-    } else {
-        let u64_mapping = fields.iter().enumerate().map(|(i, (_, ident, _))| {
-            let i = i as u64;
-            quote!(#i => _serde::__private::Ok(#this_value::#ident))
-        });
-
-        let u64_fallthrough_arm_tokens;
-        let u64_fallthrough_arm = if let Some(fallthrough) = &fallthrough {
-            fallthrough
-        } else {
-            let index_expecting = if is_variant { "variant" } else { "field" };
-            let fallthrough_msg = format!("{} index 0 <= i < {}", index_expecting, fields.len());
-            u64_fallthrough_arm_tokens = quote! {
-                _serde::__private::Err(_serde::de::Error::invalid_value(
-                    _serde::de::Unexpected::Unsigned(__value),
-                    &#fallthrough_msg,
-                ))
-            };
-            &u64_fallthrough_arm_tokens
-        };
-
-        quote! {
-            fn visit_u64<__E>(self, __value: u64) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                match __value {
-                    #(#u64_mapping,)*
-                    _ => #u64_fallthrough_arm,
-                }
-            }
-        }
-    };
-
-    let visit_borrowed = if fallthrough_borrowed.is_some() || collect_other_fields {
-        let str_mapping = str_mapping.clone();
-        let bytes_mapping = bytes_mapping.clone();
-        let fallthrough_borrowed_arm = fallthrough_borrowed.as_ref().unwrap_or(fallthrough_arm);
-        Some(quote! {
-            fn visit_borrowed_str<__E>(self, __value: &'de str) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                match __value {
-                    #(#str_mapping,)*
-                    _ => {
-                        #value_as_borrowed_str_content
-                        #fallthrough_borrowed_arm
-                    }
-                }
-            }
-
-            fn visit_borrowed_bytes<__E>(self, __value: &'de [u8]) -> _serde::__private::Result<Self::Value, __E>
-            where
-                __E: _serde::de::Error,
-            {
-                match __value {
-                    #(#bytes_mapping,)*
-                    _ => {
-                        #bytes_to_str
-                        #value_as_borrowed_bytes_content
-                        #fallthrough_borrowed_arm
-                    }
-                }
-            }
-        })
-    } else {
-        None
-    };
-
-    quote_block! {
-        fn expecting(&self, __formatter: &mut _serde::__private::Formatter) -> _serde::__private::fmt::Result {
-            _serde::__private::Formatter::write_str(__formatter, #expecting)
-        }
-
-        #visit_other
-
-        fn visit_str<__E>(self, __value: &str) -> _serde::__private::Result<Self::Value, __E>
-        where
-            __E: _serde::de::Error,
-        {
-            match __value {
-                #(#str_mapping,)*
-                _ => {
-                    #value_as_str_content
-                    #fallthrough_arm
-                }
-            }
-        }
-
-        fn visit_bytes<__E>(self, __value: &[u8]) -> _serde::__private::Result<Self::Value, __E>
-        where
-            __E: _serde::de::Error,
-        {
-            match __value {
-                #(#bytes_mapping,)*
-                _ => {
-                    #bytes_to_str
-                    #value_as_bytes_content
-                    #fallthrough_arm
-                }
-            }
-        }
-
-        #visit_borrowed
-    }
-}
-
-fn deserialize_map(
-    struct_path: &TokenStream,
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-) -> Fragment {
-    // Create the field names for the fields.
-    let fields_names: Vec<_> = fields
-        .iter()
-        .enumerate()
-        .map(|(i, field)| (field, field_i(i)))
-        .collect();
-
-    // Declare each field that will be deserialized.
-    let let_values = fields_names
-        .iter()
-        .filter(|&&(field, _)| !field.attrs.skip_deserializing() && !field.attrs.flatten())
-        .map(|(field, name)| {
-            let field_ty = field.ty;
-            quote! {
-                let mut #name: _serde::__private::Option<#field_ty> = _serde::__private::None;
-            }
-        });
-
-    // Collect contents for flatten fields into a buffer
-    let let_collect = if cattrs.has_flatten() {
-        Some(quote! {
-            let mut __collect = _serde::__private::Vec::<_serde::__private::Option<(
-                _serde::__private::de::Content,
-                _serde::__private::de::Content
-            )>>::new();
-        })
-    } else {
-        None
-    };
-
-    // Match arms to extract a value for a field.
-    let value_arms = fields_names
-        .iter()
-        .filter(|&&(field, _)| !field.attrs.skip_deserializing() && !field.attrs.flatten())
-        .map(|(field, name)| {
-            let deser_name = field.attrs.name().deserialize_name();
-
-            let visit = match field.attrs.deserialize_with() {
-                None => {
-                    let field_ty = field.ty;
-                    let span = field.original.span();
-                    let func =
-                        quote_spanned!(span=> _serde::de::MapAccess::next_value::<#field_ty>);
-                    quote! {
-                        #func(&mut __map)?
-                    }
-                }
-                Some(path) => {
-                    let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
-                    quote!({
-                        #wrapper
-                        match _serde::de::MapAccess::next_value::<#wrapper_ty>(&mut __map) {
-                            _serde::__private::Ok(__wrapper) => __wrapper.value,
-                            _serde::__private::Err(__err) => {
-                                return _serde::__private::Err(__err);
-                            }
-                        }
-                    })
-                }
-            };
-            quote! {
-                __Field::#name => {
-                    if _serde::__private::Option::is_some(&#name) {
-                        return _serde::__private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#deser_name));
-                    }
-                    #name = _serde::__private::Some(#visit);
-                }
-            }
-        });
-
-    // Visit ignored values to consume them
-    let ignored_arm = if cattrs.has_flatten() {
-        Some(quote! {
-            __Field::__other(__name) => {
-                __collect.push(_serde::__private::Some((
-                    __name,
-                    _serde::de::MapAccess::next_value(&mut __map)?)));
-            }
-        })
-    } else if cattrs.deny_unknown_fields() {
-        None
-    } else {
-        Some(quote! {
-            _ => { let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?; }
-        })
-    };
-
-    let all_skipped = fields.iter().all(|field| field.attrs.skip_deserializing());
-    let match_keys = if cattrs.deny_unknown_fields() && all_skipped {
-        quote! {
-            // FIXME: Once feature(exhaustive_patterns) is stable:
-            // let _serde::__private::None::<__Field> = _serde::de::MapAccess::next_key(&mut __map)?;
-            _serde::__private::Option::map(
-                _serde::de::MapAccess::next_key::<__Field>(&mut __map)?,
-                |__impossible| match __impossible {});
-        }
-    } else {
-        quote! {
-            while let _serde::__private::Some(__key) = _serde::de::MapAccess::next_key::<__Field>(&mut __map)? {
-                match __key {
-                    #(#value_arms)*
-                    #ignored_arm
-                }
-            }
-        }
-    };
-
-    let extract_values = fields_names
-        .iter()
-        .filter(|&&(field, _)| !field.attrs.skip_deserializing() && !field.attrs.flatten())
-        .map(|(field, name)| {
-            let missing_expr = Match(expr_is_missing(field, cattrs));
-
-            quote! {
-                let #name = match #name {
-                    _serde::__private::Some(#name) => #name,
-                    _serde::__private::None => #missing_expr
-                };
-            }
-        });
-
-    let extract_collected = fields_names
-        .iter()
-        .filter(|&&(field, _)| field.attrs.flatten() && !field.attrs.skip_deserializing())
-        .map(|(field, name)| {
-            let field_ty = field.ty;
-            let func = match field.attrs.deserialize_with() {
-                None => {
-                    let span = field.original.span();
-                    quote_spanned!(span=> _serde::de::Deserialize::deserialize)
-                }
-                Some(path) => quote!(#path),
-            };
-            quote! {
-                let #name: #field_ty = #func(
-                    _serde::__private::de::FlatMapDeserializer(
-                        &mut __collect,
-                        _serde::__private::PhantomData))?;
-            }
-        });
-
-    let collected_deny_unknown_fields = if cattrs.has_flatten() && cattrs.deny_unknown_fields() {
-        Some(quote! {
-            if let _serde::__private::Some(_serde::__private::Some((__key, _))) =
-                __collect.into_iter().filter(_serde::__private::Option::is_some).next()
-            {
-                if let _serde::__private::Some(__key) = __key.as_str() {
-                    return _serde::__private::Err(
-                        _serde::de::Error::custom(format_args!("unknown field `{}`", &__key)));
-                } else {
-                    return _serde::__private::Err(
-                        _serde::de::Error::custom(format_args!("unexpected map key")));
-                }
-            }
-        })
-    } else {
-        None
-    };
-
-    let result = fields_names.iter().map(|(field, name)| {
-        let member = &field.member;
-        if field.attrs.skip_deserializing() {
-            let value = Expr(expr_is_missing(field, cattrs));
-            quote!(#member: #value)
-        } else {
-            quote!(#member: #name)
-        }
-    });
-
-    let let_default = match cattrs.default() {
-        attr::Default::Default => Some(quote!(
-            let __default: Self::Value = _serde::__private::Default::default();
-        )),
-        attr::Default::Path(path) => Some(quote!(
-            let __default: Self::Value = #path();
-        )),
-        attr::Default::None => {
-            // We don't need the default value, to prevent an unused variable warning
-            // we'll leave the line empty.
-            None
-        }
-    };
-
-    let mut result = quote!(#struct_path { #(#result),* });
-    if params.has_getter {
-        let this_type = &params.this_type;
-        let (_, ty_generics, _) = params.generics.split_for_impl();
-        result = quote! {
-            _serde::__private::Into::<#this_type #ty_generics>::into(#result)
-        };
-    }
-
-    quote_block! {
-        #(#let_values)*
-
-        #let_collect
-
-        #match_keys
-
-        #let_default
-
-        #(#extract_values)*
-
-        #(#extract_collected)*
-
-        #collected_deny_unknown_fields
-
-        _serde::__private::Ok(#result)
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-fn deserialize_map_in_place(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-) -> Fragment {
-    assert!(!cattrs.has_flatten());
-
-    // Create the field names for the fields.
-    let fields_names: Vec<_> = fields
-        .iter()
-        .enumerate()
-        .map(|(i, field)| (field, field_i(i)))
-        .collect();
-
-    // For deserialize_in_place, declare booleans for each field that will be
-    // deserialized.
-    let let_flags = fields_names
-        .iter()
-        .filter(|&&(field, _)| !field.attrs.skip_deserializing())
-        .map(|(_, name)| {
-            quote! {
-                let mut #name: bool = false;
-            }
-        });
-
-    // Match arms to extract a value for a field.
-    let value_arms_from = fields_names
-        .iter()
-        .filter(|&&(field, _)| !field.attrs.skip_deserializing())
-        .map(|(field, name)| {
-            let deser_name = field.attrs.name().deserialize_name();
-            let member = &field.member;
-
-            let visit = match field.attrs.deserialize_with() {
-                None => {
-                    quote! {
-                        _serde::de::MapAccess::next_value_seed(&mut __map, _serde::__private::de::InPlaceSeed(&mut self.place.#member))?
-                    }
-                }
-                Some(path) => {
-                    let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
-                    quote!({
-                        #wrapper
-                        self.place.#member = match _serde::de::MapAccess::next_value::<#wrapper_ty>(&mut __map) {
-                            _serde::__private::Ok(__wrapper) => __wrapper.value,
-                            _serde::__private::Err(__err) => {
-                                return _serde::__private::Err(__err);
-                            }
-                        };
-                    })
-                }
-            };
-            quote! {
-                __Field::#name => {
-                    if #name {
-                        return _serde::__private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#deser_name));
-                    }
-                    #visit;
-                    #name = true;
-                }
-            }
-        });
-
-    // Visit ignored values to consume them
-    let ignored_arm = if cattrs.deny_unknown_fields() {
-        None
-    } else {
-        Some(quote! {
-            _ => { let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?; }
-        })
-    };
-
-    let all_skipped = fields.iter().all(|field| field.attrs.skip_deserializing());
-
-    let match_keys = if cattrs.deny_unknown_fields() && all_skipped {
-        quote! {
-            // FIXME: Once feature(exhaustive_patterns) is stable:
-            // let _serde::__private::None::<__Field> = _serde::de::MapAccess::next_key(&mut __map)?;
-            _serde::__private::Option::map(
-                _serde::de::MapAccess::next_key::<__Field>(&mut __map)?,
-                |__impossible| match __impossible {});
-        }
-    } else {
-        quote! {
-            while let _serde::__private::Some(__key) = _serde::de::MapAccess::next_key::<__Field>(&mut __map)? {
-                match __key {
-                    #(#value_arms_from)*
-                    #ignored_arm
-                }
-            }
-        }
-    };
-
-    let check_flags = fields_names
-        .iter()
-        .filter(|&&(field, _)| !field.attrs.skip_deserializing())
-        .map(|(field, name)| {
-            let missing_expr = expr_is_missing(field, cattrs);
-            // If missing_expr unconditionally returns an error, don't try
-            // to assign its value to self.place.
-            if field.attrs.default().is_none()
-                && cattrs.default().is_none()
-                && field.attrs.deserialize_with().is_some()
-            {
-                let missing_expr = Stmts(missing_expr);
-                quote! {
-                    if !#name {
-                        #missing_expr;
-                    }
-                }
-            } else {
-                let member = &field.member;
-                let missing_expr = Expr(missing_expr);
-                quote! {
-                    if !#name {
-                        self.place.#member = #missing_expr;
-                    };
-                }
-            }
-        });
-
-    let this_type = &params.this_type;
-    let (_, _, ty_generics, _) = split_with_de_lifetime(params);
-
-    let let_default = match cattrs.default() {
-        attr::Default::Default => Some(quote!(
-            let __default: #this_type #ty_generics = _serde::__private::Default::default();
-        )),
-        attr::Default::Path(path) => Some(quote!(
-            let __default: #this_type #ty_generics = #path();
-        )),
-        attr::Default::None => {
-            // We don't need the default value, to prevent an unused variable warning
-            // we'll leave the line empty.
-            None
-        }
-    };
-
-    quote_block! {
-        #(#let_flags)*
-
-        #match_keys
-
-        #let_default
-
-        #(#check_flags)*
-
-        _serde::__private::Ok(())
-    }
-}
-
-fn field_i(i: usize) -> Ident {
-    Ident::new(&format!("__field{}", i), Span::call_site())
-}
-
-/// This function wraps the expression in `#[serde(deserialize_with = "...")]`
-/// in a trait to prevent it from accessing the internal `Deserialize` state.
-fn wrap_deserialize_with(
-    params: &Parameters,
-    value_ty: &TokenStream,
-    deserialize_with: &syn::ExprPath,
-) -> (TokenStream, TokenStream) {
-    let this_type = &params.this_type;
-    let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
-        split_with_de_lifetime(params);
-    let delife = params.borrowed.de_lifetime();
-
-    let wrapper = quote! {
-        #[doc(hidden)]
-        struct __DeserializeWith #de_impl_generics #where_clause {
-            value: #value_ty,
-            phantom: _serde::__private::PhantomData<#this_type #ty_generics>,
-            lifetime: _serde::__private::PhantomData<&#delife ()>,
-        }
-
-        impl #de_impl_generics _serde::Deserialize<#delife> for __DeserializeWith #de_ty_generics #where_clause {
-            fn deserialize<__D>(__deserializer: __D) -> _serde::__private::Result<Self, __D::Error>
-            where
-                __D: _serde::Deserializer<#delife>,
-            {
-                _serde::__private::Ok(__DeserializeWith {
-                    value: #deserialize_with(__deserializer)?,
-                    phantom: _serde::__private::PhantomData,
-                    lifetime: _serde::__private::PhantomData,
-                })
-            }
-        }
-    };
-
-    let wrapper_ty = quote!(__DeserializeWith #de_ty_generics);
-
-    (wrapper, wrapper_ty)
-}
-
-fn wrap_deserialize_field_with(
-    params: &Parameters,
-    field_ty: &syn::Type,
-    deserialize_with: &syn::ExprPath,
-) -> (TokenStream, TokenStream) {
-    wrap_deserialize_with(params, &quote!(#field_ty), deserialize_with)
-}
-
-fn wrap_deserialize_variant_with(
-    params: &Parameters,
-    variant: &Variant,
-    deserialize_with: &syn::ExprPath,
-) -> (TokenStream, TokenStream, TokenStream) {
-    let field_tys = variant.fields.iter().map(|field| field.ty);
-    let (wrapper, wrapper_ty) =
-        wrap_deserialize_with(params, &quote!((#(#field_tys),*)), deserialize_with);
-
-    let unwrap_fn = unwrap_to_variant_closure(params, variant, true);
-
-    (wrapper, wrapper_ty, unwrap_fn)
-}
-
-// Generates closure that converts single input parameter to the final value.
-fn unwrap_to_variant_closure(
-    params: &Parameters,
-    variant: &Variant,
-    with_wrapper: bool,
-) -> TokenStream {
-    let this_value = &params.this_value;
-    let variant_ident = &variant.ident;
-
-    let (arg, wrapper) = if with_wrapper {
-        (quote! { __wrap }, quote! { __wrap.value })
-    } else {
-        let field_tys = variant.fields.iter().map(|field| field.ty);
-        (quote! { __wrap: (#(#field_tys),*) }, quote! { __wrap })
-    };
-
-    let field_access = (0..variant.fields.len()).map(|n| {
-        Member::Unnamed(Index {
-            index: n as u32,
-            span: Span::call_site(),
-        })
-    });
-
-    match variant.style {
-        Style::Struct if variant.fields.len() == 1 => {
-            let member = &variant.fields[0].member;
-            quote! {
-                |#arg| #this_value::#variant_ident { #member: #wrapper }
-            }
-        }
-        Style::Struct => {
-            let members = variant.fields.iter().map(|field| &field.member);
-            quote! {
-                |#arg| #this_value::#variant_ident { #(#members: #wrapper.#field_access),* }
-            }
-        }
-        Style::Tuple => quote! {
-            |#arg| #this_value::#variant_ident(#(#wrapper.#field_access),*)
-        },
-        Style::Newtype => quote! {
-            |#arg| #this_value::#variant_ident(#wrapper)
-        },
-        Style::Unit => quote! {
-            |#arg| #this_value::#variant_ident
-        },
-    }
-}
-
-fn expr_is_missing(field: &Field, cattrs: &attr::Container) -> Fragment {
-    match field.attrs.default() {
-        attr::Default::Default => {
-            let span = field.original.span();
-            let func = quote_spanned!(span=> _serde::__private::Default::default);
-            return quote_expr!(#func());
-        }
-        attr::Default::Path(path) => {
-            return quote_expr!(#path());
-        }
-        attr::Default::None => { /* below */ }
-    }
-
-    match *cattrs.default() {
-        attr::Default::Default | attr::Default::Path(_) => {
-            let member = &field.member;
-            return quote_expr!(__default.#member);
-        }
-        attr::Default::None => { /* below */ }
-    }
-
-    let name = field.attrs.name().deserialize_name();
-    match field.attrs.deserialize_with() {
-        None => {
-            let span = field.original.span();
-            let func = quote_spanned!(span=> _serde::__private::de::missing_field);
-            quote_expr! {
-                #func(#name)?
-            }
-        }
-        Some(_) => {
-            quote_expr! {
-                return _serde::__private::Err(<__A::Error as _serde::de::Error>::missing_field(#name))
-            }
-        }
-    }
-}
-
-fn expr_is_missing_seq(
-    assign_to: Option<TokenStream>,
-    index: usize,
-    field: &Field,
-    cattrs: &attr::Container,
-    expecting: &str,
-) -> TokenStream {
-    match field.attrs.default() {
-        attr::Default::Default => {
-            let span = field.original.span();
-            return quote_spanned!(span=> #assign_to _serde::__private::Default::default());
-        }
-        attr::Default::Path(path) => {
-            return quote_spanned!(path.span()=> #assign_to #path());
-        }
-        attr::Default::None => { /* below */ }
-    }
-
-    match *cattrs.default() {
-        attr::Default::Default | attr::Default::Path(_) => {
-            let member = &field.member;
-            quote!(#assign_to __default.#member)
-        }
-        attr::Default::None => quote!(
-            return _serde::__private::Err(_serde::de::Error::invalid_length(#index, &#expecting))
-        ),
-    }
-}
-
-fn effective_style(variant: &Variant) -> Style {
-    match variant.style {
-        Style::Newtype if variant.fields[0].attrs.skip_deserializing() => Style::Unit,
-        other => other,
-    }
-}
-
-struct DeImplGenerics<'a>(&'a Parameters);
-#[cfg(feature = "deserialize_in_place")]
-struct InPlaceImplGenerics<'a>(&'a Parameters);
-
-impl<'a> ToTokens for DeImplGenerics<'a> {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let mut generics = self.0.generics.clone();
-        if let Some(de_lifetime) = self.0.borrowed.de_lifetime_param() {
-            generics.params = Some(syn::GenericParam::Lifetime(de_lifetime))
-                .into_iter()
-                .chain(generics.params)
-                .collect();
-        }
-        let (impl_generics, _, _) = generics.split_for_impl();
-        impl_generics.to_tokens(tokens);
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-impl<'a> ToTokens for InPlaceImplGenerics<'a> {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let place_lifetime = place_lifetime();
-        let mut generics = self.0.generics.clone();
-
-        // Add lifetime for `&'place mut Self, and `'a: 'place`
-        for param in &mut generics.params {
-            match param {
-                syn::GenericParam::Lifetime(param) => {
-                    param.bounds.push(place_lifetime.lifetime.clone());
-                }
-                syn::GenericParam::Type(param) => {
-                    param.bounds.push(syn::TypeParamBound::Lifetime(
-                        place_lifetime.lifetime.clone(),
-                    ));
-                }
-                syn::GenericParam::Const(_) => {}
-            }
-        }
-        generics.params = Some(syn::GenericParam::Lifetime(place_lifetime))
-            .into_iter()
-            .chain(generics.params)
-            .collect();
-        if let Some(de_lifetime) = self.0.borrowed.de_lifetime_param() {
-            generics.params = Some(syn::GenericParam::Lifetime(de_lifetime))
-                .into_iter()
-                .chain(generics.params)
-                .collect();
-        }
-        let (impl_generics, _, _) = generics.split_for_impl();
-        impl_generics.to_tokens(tokens);
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-impl<'a> DeImplGenerics<'a> {
-    fn in_place(self) -> InPlaceImplGenerics<'a> {
-        InPlaceImplGenerics(self.0)
-    }
-}
-
-struct DeTypeGenerics<'a>(&'a Parameters);
-#[cfg(feature = "deserialize_in_place")]
-struct InPlaceTypeGenerics<'a>(&'a Parameters);
-
-fn de_type_generics_to_tokens(
-    mut generics: syn::Generics,
-    borrowed: &BorrowedLifetimes,
-    tokens: &mut TokenStream,
-) {
-    if borrowed.de_lifetime_param().is_some() {
-        let def = syn::LifetimeParam {
-            attrs: Vec::new(),
-            lifetime: syn::Lifetime::new("'de", Span::call_site()),
-            colon_token: None,
-            bounds: Punctuated::new(),
-        };
-        // Prepend 'de lifetime to list of generics
-        generics.params = Some(syn::GenericParam::Lifetime(def))
-            .into_iter()
-            .chain(generics.params)
-            .collect();
-    }
-    let (_, ty_generics, _) = generics.split_for_impl();
-    ty_generics.to_tokens(tokens);
-}
-
-impl<'a> ToTokens for DeTypeGenerics<'a> {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        de_type_generics_to_tokens(self.0.generics.clone(), &self.0.borrowed, tokens);
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-impl<'a> ToTokens for InPlaceTypeGenerics<'a> {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let mut generics = self.0.generics.clone();
-        generics.params = Some(syn::GenericParam::Lifetime(place_lifetime()))
-            .into_iter()
-            .chain(generics.params)
-            .collect();
-
-        de_type_generics_to_tokens(generics, &self.0.borrowed, tokens);
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-impl<'a> DeTypeGenerics<'a> {
-    fn in_place(self) -> InPlaceTypeGenerics<'a> {
-        InPlaceTypeGenerics(self.0)
-    }
-}
-
-#[cfg(feature = "deserialize_in_place")]
-fn place_lifetime() -> syn::LifetimeParam {
-    syn::LifetimeParam {
-        attrs: Vec::new(),
-        lifetime: syn::Lifetime::new("'place", Span::call_site()),
-        colon_token: None,
-        bounds: Punctuated::new(),
-    }
-}
-
-fn split_with_de_lifetime(
-    params: &Parameters,
-) -> (
-    DeImplGenerics,
-    DeTypeGenerics,
-    syn::TypeGenerics,
-    Option<&syn::WhereClause>,
-) {
-    let de_impl_generics = DeImplGenerics(params);
-    let de_ty_generics = DeTypeGenerics(params);
-    let (_, ty_generics, where_clause) = params.generics.split_for_impl();
-    (de_impl_generics, de_ty_generics, ty_generics, where_clause)
-}
diff --git a/vendor/serde_derive/src/dummy.rs b/vendor/serde_derive/src/dummy.rs
deleted file mode 100644
index 095f950..0000000
--- a/vendor/serde_derive/src/dummy.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-use proc_macro2::TokenStream;
-use quote::quote;
-
-pub fn wrap_in_const(serde_path: Option<&syn::Path>, code: TokenStream) -> TokenStream {
-    let use_serde = match serde_path {
-        Some(path) => quote! {
-            use #path as _serde;
-        },
-        None => quote! {
-            #[allow(unused_extern_crates, clippy::useless_attribute)]
-            extern crate serde as _serde;
-        },
-    };
-
-    quote! {
-        #[doc(hidden)]
-        #[allow(non_upper_case_globals, unused_attributes, unused_qualifications)]
-        const _: () = {
-            #use_serde
-            #code
-        };
-    }
-}
diff --git a/vendor/serde_derive/src/fragment.rs b/vendor/serde_derive/src/fragment.rs
deleted file mode 100644
index 6627c26..0000000
--- a/vendor/serde_derive/src/fragment.rs
+++ /dev/null
@@ -1,74 +0,0 @@
-use proc_macro2::TokenStream;
-use quote::ToTokens;
-use syn::{token, Token};
-
-pub enum Fragment {
-    /// Tokens that can be used as an expression.
-    Expr(TokenStream),
-    /// Tokens that can be used inside a block. The surrounding curly braces are
-    /// not part of these tokens.
-    Block(TokenStream),
-}
-
-macro_rules! quote_expr {
-    ($($tt:tt)*) => {
-        $crate::fragment::Fragment::Expr(quote!($($tt)*))
-    }
-}
-
-macro_rules! quote_block {
-    ($($tt:tt)*) => {
-        $crate::fragment::Fragment::Block(quote!($($tt)*))
-    }
-}
-
-/// Interpolate a fragment in place of an expression. This involves surrounding
-/// Block fragments in curly braces.
-pub struct Expr(pub Fragment);
-impl ToTokens for Expr {
-    fn to_tokens(&self, out: &mut TokenStream) {
-        match &self.0 {
-            Fragment::Expr(expr) => expr.to_tokens(out),
-            Fragment::Block(block) => {
-                token::Brace::default().surround(out, |out| block.to_tokens(out));
-            }
-        }
-    }
-}
-
-/// Interpolate a fragment as the statements of a block.
-pub struct Stmts(pub Fragment);
-impl ToTokens for Stmts {
-    fn to_tokens(&self, out: &mut TokenStream) {
-        match &self.0 {
-            Fragment::Expr(expr) => expr.to_tokens(out),
-            Fragment::Block(block) => block.to_tokens(out),
-        }
-    }
-}
-
-/// Interpolate a fragment as the value part of a `match` expression. This
-/// involves putting a comma after expressions and curly braces around blocks.
-pub struct Match(pub Fragment);
-impl ToTokens for Match {
-    fn to_tokens(&self, out: &mut TokenStream) {
-        match &self.0 {
-            Fragment::Expr(expr) => {
-                expr.to_tokens(out);
-                <Token![,]>::default().to_tokens(out);
-            }
-            Fragment::Block(block) => {
-                token::Brace::default().surround(out, |out| block.to_tokens(out));
-            }
-        }
-    }
-}
-
-impl AsRef<TokenStream> for Fragment {
-    fn as_ref(&self) -> &TokenStream {
-        match self {
-            Fragment::Expr(expr) => expr,
-            Fragment::Block(block) => block,
-        }
-    }
-}
diff --git a/vendor/serde_derive/src/internals/ast.rs b/vendor/serde_derive/src/internals/ast.rs
deleted file mode 100644
index a28d3ae..0000000
--- a/vendor/serde_derive/src/internals/ast.rs
+++ /dev/null
@@ -1,216 +0,0 @@
-//! A Serde ast, parsed from the Syn ast and ready to generate Rust code.
-
-use crate::internals::{attr, check, Ctxt, Derive};
-use syn::punctuated::Punctuated;
-use syn::Token;
-
-/// A source data structure annotated with `#[derive(Serialize)]` and/or `#[derive(Deserialize)]`,
-/// parsed into an internal representation.
-pub struct Container<'a> {
-    /// The struct or enum name (without generics).
-    pub ident: syn::Ident,
-    /// Attributes on the structure, parsed for Serde.
-    pub attrs: attr::Container,
-    /// The contents of the struct or enum.
-    pub data: Data<'a>,
-    /// Any generics on the struct or enum.
-    pub generics: &'a syn::Generics,
-    /// Original input.
-    pub original: &'a syn::DeriveInput,
-}
-
-/// The fields of a struct or enum.
-///
-/// Analogous to `syn::Data`.
-pub enum Data<'a> {
-    Enum(Vec<Variant<'a>>),
-    Struct(Style, Vec<Field<'a>>),
-}
-
-/// A variant of an enum.
-pub struct Variant<'a> {
-    pub ident: syn::Ident,
-    pub attrs: attr::Variant,
-    pub style: Style,
-    pub fields: Vec<Field<'a>>,
-    pub original: &'a syn::Variant,
-}
-
-/// A field of a struct.
-pub struct Field<'a> {
-    pub member: syn::Member,
-    pub attrs: attr::Field,
-    pub ty: &'a syn::Type,
-    pub original: &'a syn::Field,
-}
-
-#[derive(Copy, Clone)]
-pub enum Style {
-    /// Named fields.
-    Struct,
-    /// Many unnamed fields.
-    Tuple,
-    /// One unnamed field.
-    Newtype,
-    /// No fields.
-    Unit,
-}
-
-impl<'a> Container<'a> {
-    /// Convert the raw Syn ast into a parsed container object, collecting errors in `cx`.
-    pub fn from_ast(
-        cx: &Ctxt,
-        item: &'a syn::DeriveInput,
-        derive: Derive,
-    ) -> Option<Container<'a>> {
-        let mut attrs = attr::Container::from_ast(cx, item);
-
-        let mut data = match &item.data {
-            syn::Data::Enum(data) => Data::Enum(enum_from_ast(cx, &data.variants, attrs.default())),
-            syn::Data::Struct(data) => {
-                let (style, fields) = struct_from_ast(cx, &data.fields, None, attrs.default());
-                Data::Struct(style, fields)
-            }
-            syn::Data::Union(_) => {
-                cx.error_spanned_by(item, "Serde does not support derive for unions");
-                return None;
-            }
-        };
-
-        let mut has_flatten = false;
-        match &mut data {
-            Data::Enum(variants) => {
-                for variant in variants {
-                    variant.attrs.rename_by_rules(attrs.rename_all_rules());
-                    for field in &mut variant.fields {
-                        if field.attrs.flatten() {
-                            has_flatten = true;
-                        }
-                        field.attrs.rename_by_rules(
-                            variant
-                                .attrs
-                                .rename_all_rules()
-                                .or(attrs.rename_all_fields_rules()),
-                        );
-                    }
-                }
-            }
-            Data::Struct(_, fields) => {
-                for field in fields {
-                    if field.attrs.flatten() {
-                        has_flatten = true;
-                    }
-                    field.attrs.rename_by_rules(attrs.rename_all_rules());
-                }
-            }
-        }
-
-        if has_flatten {
-            attrs.mark_has_flatten();
-        }
-
-        let mut item = Container {
-            ident: item.ident.clone(),
-            attrs,
-            data,
-            generics: &item.generics,
-            original: item,
-        };
-        check::check(cx, &mut item, derive);
-        Some(item)
-    }
-}
-
-impl<'a> Data<'a> {
-    pub fn all_fields(&'a self) -> Box<dyn Iterator<Item = &'a Field<'a>> + 'a> {
-        match self {
-            Data::Enum(variants) => {
-                Box::new(variants.iter().flat_map(|variant| variant.fields.iter()))
-            }
-            Data::Struct(_, fields) => Box::new(fields.iter()),
-        }
-    }
-
-    pub fn has_getter(&self) -> bool {
-        self.all_fields().any(|f| f.attrs.getter().is_some())
-    }
-}
-
-fn enum_from_ast<'a>(
-    cx: &Ctxt,
-    variants: &'a Punctuated<syn::Variant, Token![,]>,
-    container_default: &attr::Default,
-) -> Vec<Variant<'a>> {
-    let variants: Vec<Variant> = variants
-        .iter()
-        .map(|variant| {
-            let attrs = attr::Variant::from_ast(cx, variant);
-            let (style, fields) =
-                struct_from_ast(cx, &variant.fields, Some(&attrs), container_default);
-            Variant {
-                ident: variant.ident.clone(),
-                attrs,
-                style,
-                fields,
-                original: variant,
-            }
-        })
-        .collect();
-
-    let index_of_last_tagged_variant = variants
-        .iter()
-        .rposition(|variant| !variant.attrs.untagged());
-    if let Some(index_of_last_tagged_variant) = index_of_last_tagged_variant {
-        for variant in &variants[..index_of_last_tagged_variant] {
-            if variant.attrs.untagged() {
-                cx.error_spanned_by(&variant.ident, "all variants with the #[serde(untagged)] attribute must be placed at the end of the enum");
-            }
-        }
-    }
-
-    variants
-}
-
-fn struct_from_ast<'a>(
-    cx: &Ctxt,
-    fields: &'a syn::Fields,
-    attrs: Option<&attr::Variant>,
-    container_default: &attr::Default,
-) -> (Style, Vec<Field<'a>>) {
-    match fields {
-        syn::Fields::Named(fields) => (
-            Style::Struct,
-            fields_from_ast(cx, &fields.named, attrs, container_default),
-        ),
-        syn::Fields::Unnamed(fields) if fields.unnamed.len() == 1 => (
-            Style::Newtype,
-            fields_from_ast(cx, &fields.unnamed, attrs, container_default),
-        ),
-        syn::Fields::Unnamed(fields) => (
-            Style::Tuple,
-            fields_from_ast(cx, &fields.unnamed, attrs, container_default),
-        ),
-        syn::Fields::Unit => (Style::Unit, Vec::new()),
-    }
-}
-
-fn fields_from_ast<'a>(
-    cx: &Ctxt,
-    fields: &'a Punctuated<syn::Field, Token![,]>,
-    attrs: Option<&attr::Variant>,
-    container_default: &attr::Default,
-) -> Vec<Field<'a>> {
-    fields
-        .iter()
-        .enumerate()
-        .map(|(i, field)| Field {
-            member: match &field.ident {
-                Some(ident) => syn::Member::Named(ident.clone()),
-                None => syn::Member::Unnamed(i.into()),
-            },
-            attrs: attr::Field::from_ast(cx, i, field, attrs, container_default),
-            ty: &field.ty,
-            original: field,
-        })
-        .collect()
-}
diff --git a/vendor/serde_derive/src/internals/attr.rs b/vendor/serde_derive/src/internals/attr.rs
deleted file mode 100644
index bb9de32..0000000
--- a/vendor/serde_derive/src/internals/attr.rs
+++ /dev/null
@@ -1,1881 +0,0 @@
-use crate::internals::symbol::*;
-use crate::internals::{ungroup, Ctxt};
-use proc_macro2::{Spacing, Span, TokenStream, TokenTree};
-use quote::ToTokens;
-use std::borrow::Cow;
-use std::collections::BTreeSet;
-use std::iter::FromIterator;
-use syn::meta::ParseNestedMeta;
-use syn::parse::ParseStream;
-use syn::punctuated::Punctuated;
-use syn::{parse_quote, token, Ident, Lifetime, Token};
-
-// This module handles parsing of `#[serde(...)]` attributes. The entrypoints
-// are `attr::Container::from_ast`, `attr::Variant::from_ast`, and
-// `attr::Field::from_ast`. Each returns an instance of the corresponding
-// struct. Note that none of them return a Result. Unrecognized, malformed, or
-// duplicated attributes result in a span_err but otherwise are ignored. The
-// user will see errors simultaneously for all bad attributes in the crate
-// rather than just the first.
-
-pub use crate::internals::case::RenameRule;
-
-struct Attr<'c, T> {
-    cx: &'c Ctxt,
-    name: Symbol,
-    tokens: TokenStream,
-    value: Option<T>,
-}
-
-impl<'c, T> Attr<'c, T> {
-    fn none(cx: &'c Ctxt, name: Symbol) -> Self {
-        Attr {
-            cx,
-            name,
-            tokens: TokenStream::new(),
-            value: None,
-        }
-    }
-
-    fn set<A: ToTokens>(&mut self, obj: A, value: T) {
-        let tokens = obj.into_token_stream();
-
-        if self.value.is_some() {
-            let msg = format!("duplicate serde attribute `{}`", self.name);
-            self.cx.error_spanned_by(tokens, msg);
-        } else {
-            self.tokens = tokens;
-            self.value = Some(value);
-        }
-    }
-
-    fn set_opt<A: ToTokens>(&mut self, obj: A, value: Option<T>) {
-        if let Some(value) = value {
-            self.set(obj, value);
-        }
-    }
-
-    fn set_if_none(&mut self, value: T) {
-        if self.value.is_none() {
-            self.value = Some(value);
-        }
-    }
-
-    fn get(self) -> Option<T> {
-        self.value
-    }
-
-    fn get_with_tokens(self) -> Option<(TokenStream, T)> {
-        match self.value {
-            Some(v) => Some((self.tokens, v)),
-            None => None,
-        }
-    }
-}
-
-struct BoolAttr<'c>(Attr<'c, ()>);
-
-impl<'c> BoolAttr<'c> {
-    fn none(cx: &'c Ctxt, name: Symbol) -> Self {
-        BoolAttr(Attr::none(cx, name))
-    }
-
-    fn set_true<A: ToTokens>(&mut self, obj: A) {
-        self.0.set(obj, ());
-    }
-
-    fn get(&self) -> bool {
-        self.0.value.is_some()
-    }
-}
-
-struct VecAttr<'c, T> {
-    cx: &'c Ctxt,
-    name: Symbol,
-    first_dup_tokens: TokenStream,
-    values: Vec<T>,
-}
-
-impl<'c, T> VecAttr<'c, T> {
-    fn none(cx: &'c Ctxt, name: Symbol) -> Self {
-        VecAttr {
-            cx,
-            name,
-            first_dup_tokens: TokenStream::new(),
-            values: Vec::new(),
-        }
-    }
-
-    fn insert<A: ToTokens>(&mut self, obj: A, value: T) {
-        if self.values.len() == 1 {
-            self.first_dup_tokens = obj.into_token_stream();
-        }
-        self.values.push(value);
-    }
-
-    fn at_most_one(mut self) -> Option<T> {
-        if self.values.len() > 1 {
-            let dup_token = self.first_dup_tokens;
-            let msg = format!("duplicate serde attribute `{}`", self.name);
-            self.cx.error_spanned_by(dup_token, msg);
-            None
-        } else {
-            self.values.pop()
-        }
-    }
-
-    fn get(self) -> Vec<T> {
-        self.values
-    }
-}
-
-pub struct Name {
-    serialize: String,
-    serialize_renamed: bool,
-    deserialize: String,
-    deserialize_renamed: bool,
-    deserialize_aliases: BTreeSet<String>,
-}
-
-fn unraw(ident: &Ident) -> String {
-    ident.to_string().trim_start_matches("r#").to_owned()
-}
-
-impl Name {
-    fn from_attrs(
-        source_name: String,
-        ser_name: Attr<String>,
-        de_name: Attr<String>,
-        de_aliases: Option<VecAttr<String>>,
-    ) -> Name {
-        let mut alias_set = BTreeSet::new();
-        if let Some(de_aliases) = de_aliases {
-            for alias_name in de_aliases.get() {
-                alias_set.insert(alias_name);
-            }
-        }
-
-        let ser_name = ser_name.get();
-        let ser_renamed = ser_name.is_some();
-        let de_name = de_name.get();
-        let de_renamed = de_name.is_some();
-        Name {
-            serialize: ser_name.unwrap_or_else(|| source_name.clone()),
-            serialize_renamed: ser_renamed,
-            deserialize: de_name.unwrap_or(source_name),
-            deserialize_renamed: de_renamed,
-            deserialize_aliases: alias_set,
-        }
-    }
-
-    /// Return the container name for the container when serializing.
-    pub fn serialize_name(&self) -> &str {
-        &self.serialize
-    }
-
-    /// Return the container name for the container when deserializing.
-    pub fn deserialize_name(&self) -> &str {
-        &self.deserialize
-    }
-
-    fn deserialize_aliases(&self) -> &BTreeSet<String> {
-        &self.deserialize_aliases
-    }
-}
-
-#[derive(Copy, Clone)]
-pub struct RenameAllRules {
-    serialize: RenameRule,
-    deserialize: RenameRule,
-}
-
-impl RenameAllRules {
-    /// Returns a new `RenameAllRules` with the individual rules of `self` and
-    /// `other_rules` joined by `RenameRules::or`.
-    pub fn or(self, other_rules: Self) -> Self {
-        Self {
-            serialize: self.serialize.or(other_rules.serialize),
-            deserialize: self.deserialize.or(other_rules.deserialize),
-        }
-    }
-}
-
-/// Represents struct or enum attribute information.
-pub struct Container {
-    name: Name,
-    transparent: bool,
-    deny_unknown_fields: bool,
-    default: Default,
-    rename_all_rules: RenameAllRules,
-    rename_all_fields_rules: RenameAllRules,
-    ser_bound: Option<Vec<syn::WherePredicate>>,
-    de_bound: Option<Vec<syn::WherePredicate>>,
-    tag: TagType,
-    type_from: Option<syn::Type>,
-    type_try_from: Option<syn::Type>,
-    type_into: Option<syn::Type>,
-    remote: Option<syn::Path>,
-    identifier: Identifier,
-    has_flatten: bool,
-    serde_path: Option<syn::Path>,
-    is_packed: bool,
-    /// Error message generated when type can't be deserialized
-    expecting: Option<String>,
-    non_exhaustive: bool,
-}
-
-/// Styles of representing an enum.
-pub enum TagType {
-    /// The default.
-    ///
-    /// ```json
-    /// {"variant1": {"key1": "value1", "key2": "value2"}}
-    /// ```
-    External,
-
-    /// `#[serde(tag = "type")]`
-    ///
-    /// ```json
-    /// {"type": "variant1", "key1": "value1", "key2": "value2"}
-    /// ```
-    Internal { tag: String },
-
-    /// `#[serde(tag = "t", content = "c")]`
-    ///
-    /// ```json
-    /// {"t": "variant1", "c": {"key1": "value1", "key2": "value2"}}
-    /// ```
-    Adjacent { tag: String, content: String },
-
-    /// `#[serde(untagged)]`
-    ///
-    /// ```json
-    /// {"key1": "value1", "key2": "value2"}
-    /// ```
-    None,
-}
-
-/// Whether this enum represents the fields of a struct or the variants of an
-/// enum.
-#[derive(Copy, Clone)]
-pub enum Identifier {
-    /// It does not.
-    No,
-
-    /// This enum represents the fields of a struct. All of the variants must be
-    /// unit variants, except possibly one which is annotated with
-    /// `#[serde(other)]` and is a newtype variant.
-    Field,
-
-    /// This enum represents the variants of an enum. All of the variants must
-    /// be unit variants.
-    Variant,
-}
-
-impl Identifier {
-    #[cfg(feature = "deserialize_in_place")]
-    pub fn is_some(self) -> bool {
-        match self {
-            Identifier::No => false,
-            Identifier::Field | Identifier::Variant => true,
-        }
-    }
-}
-
-impl Container {
-    /// Extract out the `#[serde(...)]` attributes from an item.
-    pub fn from_ast(cx: &Ctxt, item: &syn::DeriveInput) -> Self {
-        let mut ser_name = Attr::none(cx, RENAME);
-        let mut de_name = Attr::none(cx, RENAME);
-        let mut transparent = BoolAttr::none(cx, TRANSPARENT);
-        let mut deny_unknown_fields = BoolAttr::none(cx, DENY_UNKNOWN_FIELDS);
-        let mut default = Attr::none(cx, DEFAULT);
-        let mut rename_all_ser_rule = Attr::none(cx, RENAME_ALL);
-        let mut rename_all_de_rule = Attr::none(cx, RENAME_ALL);
-        let mut rename_all_fields_ser_rule = Attr::none(cx, RENAME_ALL_FIELDS);
-        let mut rename_all_fields_de_rule = Attr::none(cx, RENAME_ALL_FIELDS);
-        let mut ser_bound = Attr::none(cx, BOUND);
-        let mut de_bound = Attr::none(cx, BOUND);
-        let mut untagged = BoolAttr::none(cx, UNTAGGED);
-        let mut internal_tag = Attr::none(cx, TAG);
-        let mut content = Attr::none(cx, CONTENT);
-        let mut type_from = Attr::none(cx, FROM);
-        let mut type_try_from = Attr::none(cx, TRY_FROM);
-        let mut type_into = Attr::none(cx, INTO);
-        let mut remote = Attr::none(cx, REMOTE);
-        let mut field_identifier = BoolAttr::none(cx, FIELD_IDENTIFIER);
-        let mut variant_identifier = BoolAttr::none(cx, VARIANT_IDENTIFIER);
-        let mut serde_path = Attr::none(cx, CRATE);
-        let mut expecting = Attr::none(cx, EXPECTING);
-        let mut non_exhaustive = false;
-
-        for attr in &item.attrs {
-            if attr.path() != SERDE {
-                non_exhaustive |=
-                    matches!(&attr.meta, syn::Meta::Path(path) if path == NON_EXHAUSTIVE);
-                continue;
-            }
-
-            if let syn::Meta::List(meta) = &attr.meta {
-                if meta.tokens.is_empty() {
-                    continue;
-                }
-            }
-
-            if let Err(err) = attr.parse_nested_meta(|meta| {
-                if meta.path == RENAME {
-                    // #[serde(rename = "foo")]
-                    // #[serde(rename(serialize = "foo", deserialize = "bar"))]
-                    let (ser, de) = get_renames(cx, RENAME, &meta)?;
-                    ser_name.set_opt(&meta.path, ser.as_ref().map(syn::LitStr::value));
-                    de_name.set_opt(&meta.path, de.as_ref().map(syn::LitStr::value));
-                } else if meta.path == RENAME_ALL {
-                    // #[serde(rename_all = "foo")]
-                    // #[serde(rename_all(serialize = "foo", deserialize = "bar"))]
-                    let one_name = meta.input.peek(Token![=]);
-                    let (ser, de) = get_renames(cx, RENAME_ALL, &meta)?;
-                    if let Some(ser) = ser {
-                        match RenameRule::from_str(&ser.value()) {
-                            Ok(rename_rule) => rename_all_ser_rule.set(&meta.path, rename_rule),
-                            Err(err) => cx.error_spanned_by(ser, err),
-                        }
-                    }
-                    if let Some(de) = de {
-                        match RenameRule::from_str(&de.value()) {
-                            Ok(rename_rule) => rename_all_de_rule.set(&meta.path, rename_rule),
-                            Err(err) => {
-                                if !one_name {
-                                    cx.error_spanned_by(de, err);
-                                }
-                            }
-                        }
-                    }
-                } else if meta.path == RENAME_ALL_FIELDS {
-                    // #[serde(rename_all_fields = "foo")]
-                    // #[serde(rename_all_fields(serialize = "foo", deserialize = "bar"))]
-                    let one_name = meta.input.peek(Token![=]);
-                    let (ser, de) = get_renames(cx, RENAME_ALL_FIELDS, &meta)?;
-
-                    match item.data {
-                        syn::Data::Enum(_) => {
-                            if let Some(ser) = ser {
-                                match RenameRule::from_str(&ser.value()) {
-                                    Ok(rename_rule) => {
-                                        rename_all_fields_ser_rule.set(&meta.path, rename_rule);
-                                    }
-                                    Err(err) => cx.error_spanned_by(ser, err),
-                                }
-                            }
-                            if let Some(de) = de {
-                                match RenameRule::from_str(&de.value()) {
-                                    Ok(rename_rule) => {
-                                        rename_all_fields_de_rule.set(&meta.path, rename_rule);
-                                    }
-                                    Err(err) => {
-                                        if !one_name {
-                                            cx.error_spanned_by(de, err);
-                                        }
-                                    }
-                                }
-                            }
-                        }
-                        syn::Data::Struct(_) => {
-                            let msg = "#[serde(rename_all_fields)] can only be used on enums";
-                            cx.syn_error(meta.error(msg));
-                        }
-                        syn::Data::Union(_) => {
-                            let msg = "#[serde(rename_all_fields)] can only be used on enums";
-                            cx.syn_error(meta.error(msg));
-                        }
-                    }
-                } else if meta.path == TRANSPARENT {
-                    // #[serde(transparent)]
-                    transparent.set_true(meta.path);
-                } else if meta.path == DENY_UNKNOWN_FIELDS {
-                    // #[serde(deny_unknown_fields)]
-                    deny_unknown_fields.set_true(meta.path);
-                } else if meta.path == DEFAULT {
-                    if meta.input.peek(Token![=]) {
-                        // #[serde(default = "...")]
-                        if let Some(path) = parse_lit_into_expr_path(cx, DEFAULT, &meta)? {
-                            match &item.data {
-                                syn::Data::Struct(syn::DataStruct { fields, .. }) => match fields {
-                                    syn::Fields::Named(_) | syn::Fields::Unnamed(_) => {
-                                        default.set(&meta.path, Default::Path(path));
-                                    }
-                                    syn::Fields::Unit => {
-                                        let msg = "#[serde(default = \"...\")] can only be used on structs that have fields";
-                                        cx.syn_error(meta.error(msg));
-                                    }
-                                },
-                                syn::Data::Enum(_) => {
-                                    let msg = "#[serde(default = \"...\")] can only be used on structs";
-                                    cx.syn_error(meta.error(msg));
-                                }
-                                syn::Data::Union(_) => {
-                                    let msg = "#[serde(default = \"...\")] can only be used on structs";
-                                    cx.syn_error(meta.error(msg));
-                                }
-                            }
-                        }
-                    } else {
-                        // #[serde(default)]
-                        match &item.data {
-                            syn::Data::Struct(syn::DataStruct { fields, .. }) => match fields {
-                                syn::Fields::Named(_) | syn::Fields::Unnamed(_) => {
-                                    default.set(meta.path, Default::Default);
-                                }
-                                syn::Fields::Unit => {
-                                    let msg = "#[serde(default)] can only be used on structs that have fields";
-                                    cx.error_spanned_by(fields, msg);
-                                }
-                            },
-                            syn::Data::Enum(_) => {
-                                let msg = "#[serde(default)] can only be used on structs";
-                                cx.syn_error(meta.error(msg));
-                            }
-                            syn::Data::Union(_) => {
-                                let msg = "#[serde(default)] can only be used on structs";
-                                cx.syn_error(meta.error(msg));
-                            }
-                        }
-                    }
-                } else if meta.path == BOUND {
-                    // #[serde(bound = "T: SomeBound")]
-                    // #[serde(bound(serialize = "...", deserialize = "..."))]
-                    let (ser, de) = get_where_predicates(cx, &meta)?;
-                    ser_bound.set_opt(&meta.path, ser);
-                    de_bound.set_opt(&meta.path, de);
-                } else if meta.path == UNTAGGED {
-                    // #[serde(untagged)]
-                    match item.data {
-                        syn::Data::Enum(_) => {
-                            untagged.set_true(&meta.path);
-                        }
-                        syn::Data::Struct(_) => {
-                            let msg = "#[serde(untagged)] can only be used on enums";
-                            cx.syn_error(meta.error(msg));
-                        }
-                        syn::Data::Union(_) => {
-                            let msg = "#[serde(untagged)] can only be used on enums";
-                            cx.syn_error(meta.error(msg));
-                        }
-                    }
-                } else if meta.path == TAG {
-                    // #[serde(tag = "type")]
-                    if let Some(s) = get_lit_str(cx, TAG, &meta)? {
-                        match &item.data {
-                            syn::Data::Enum(_) => {
-                                internal_tag.set(&meta.path, s.value());
-                            }
-                            syn::Data::Struct(syn::DataStruct { fields, .. }) => match fields {
-                                syn::Fields::Named(_) => {
-                                    internal_tag.set(&meta.path, s.value());
-                                }
-                                syn::Fields::Unnamed(_) | syn::Fields::Unit => {
-                                    let msg = "#[serde(tag = \"...\")] can only be used on enums and structs with named fields";
-                                    cx.syn_error(meta.error(msg));
-                                }
-                            },
-                            syn::Data::Union(_) => {
-                                let msg = "#[serde(tag = \"...\")] can only be used on enums and structs with named fields";
-                                cx.syn_error(meta.error(msg));
-                            }
-                        }
-                    }
-                } else if meta.path == CONTENT {
-                    // #[serde(content = "c")]
-                    if let Some(s) = get_lit_str(cx, CONTENT, &meta)? {
-                        match &item.data {
-                            syn::Data::Enum(_) => {
-                                content.set(&meta.path, s.value());
-                            }
-                            syn::Data::Struct(_) => {
-                                let msg = "#[serde(content = \"...\")] can only be used on enums";
-                                cx.syn_error(meta.error(msg));
-                            }
-                            syn::Data::Union(_) => {
-                                let msg = "#[serde(content = \"...\")] can only be used on enums";
-                                cx.syn_error(meta.error(msg));
-                            }
-                        }
-                    }
-                } else if meta.path == FROM {
-                    // #[serde(from = "Type")]
-                    if let Some(from_ty) = parse_lit_into_ty(cx, FROM, &meta)? {
-                        type_from.set_opt(&meta.path, Some(from_ty));
-                    }
-                } else if meta.path == TRY_FROM {
-                    // #[serde(try_from = "Type")]
-                    if let Some(try_from_ty) = parse_lit_into_ty(cx, TRY_FROM, &meta)? {
-                        type_try_from.set_opt(&meta.path, Some(try_from_ty));
-                    }
-                } else if meta.path == INTO {
-                    // #[serde(into = "Type")]
-                    if let Some(into_ty) = parse_lit_into_ty(cx, INTO, &meta)? {
-                        type_into.set_opt(&meta.path, Some(into_ty));
-                    }
-                } else if meta.path == REMOTE {
-                    // #[serde(remote = "...")]
-                    if let Some(path) = parse_lit_into_path(cx, REMOTE, &meta)? {
-                        if is_primitive_path(&path, "Self") {
-                            remote.set(&meta.path, item.ident.clone().into());
-                        } else {
-                            remote.set(&meta.path, path);
-                        }
-                    }
-                } else if meta.path == FIELD_IDENTIFIER {
-                    // #[serde(field_identifier)]
-                    field_identifier.set_true(&meta.path);
-                } else if meta.path == VARIANT_IDENTIFIER {
-                    // #[serde(variant_identifier)]
-                    variant_identifier.set_true(&meta.path);
-                } else if meta.path == CRATE {
-                    // #[serde(crate = "foo")]
-                    if let Some(path) = parse_lit_into_path(cx, CRATE, &meta)? {
-                        serde_path.set(&meta.path, path);
-                    }
-                } else if meta.path == EXPECTING {
-                    // #[serde(expecting = "a message")]
-                    if let Some(s) = get_lit_str(cx, EXPECTING, &meta)? {
-                        expecting.set(&meta.path, s.value());
-                    }
-                } else {
-                    let path = meta.path.to_token_stream().to_string().replace(' ', "");
-                    return Err(
-                        meta.error(format_args!("unknown serde container attribute `{}`", path))
-                    );
-                }
-                Ok(())
-            }) {
-                cx.syn_error(err);
-            }
-        }
-
-        let mut is_packed = false;
-        for attr in &item.attrs {
-            if attr.path() == REPR {
-                let _ = attr.parse_args_with(|input: ParseStream| {
-                    while let Some(token) = input.parse()? {
-                        if let TokenTree::Ident(ident) = token {
-                            is_packed |= ident == "packed";
-                        }
-                    }
-                    Ok(())
-                });
-            }
-        }
-
-        Container {
-            name: Name::from_attrs(unraw(&item.ident), ser_name, de_name, None),
-            transparent: transparent.get(),
-            deny_unknown_fields: deny_unknown_fields.get(),
-            default: default.get().unwrap_or(Default::None),
-            rename_all_rules: RenameAllRules {
-                serialize: rename_all_ser_rule.get().unwrap_or(RenameRule::None),
-                deserialize: rename_all_de_rule.get().unwrap_or(RenameRule::None),
-            },
-            rename_all_fields_rules: RenameAllRules {
-                serialize: rename_all_fields_ser_rule.get().unwrap_or(RenameRule::None),
-                deserialize: rename_all_fields_de_rule.get().unwrap_or(RenameRule::None),
-            },
-            ser_bound: ser_bound.get(),
-            de_bound: de_bound.get(),
-            tag: decide_tag(cx, item, untagged, internal_tag, content),
-            type_from: type_from.get(),
-            type_try_from: type_try_from.get(),
-            type_into: type_into.get(),
-            remote: remote.get(),
-            identifier: decide_identifier(cx, item, field_identifier, variant_identifier),
-            has_flatten: false,
-            serde_path: serde_path.get(),
-            is_packed,
-            expecting: expecting.get(),
-            non_exhaustive,
-        }
-    }
-
-    pub fn name(&self) -> &Name {
-        &self.name
-    }
-
-    pub fn rename_all_rules(&self) -> RenameAllRules {
-        self.rename_all_rules
-    }
-
-    pub fn rename_all_fields_rules(&self) -> RenameAllRules {
-        self.rename_all_fields_rules
-    }
-
-    pub fn transparent(&self) -> bool {
-        self.transparent
-    }
-
-    pub fn deny_unknown_fields(&self) -> bool {
-        self.deny_unknown_fields
-    }
-
-    pub fn default(&self) -> &Default {
-        &self.default
-    }
-
-    pub fn ser_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.ser_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn de_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.de_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn tag(&self) -> &TagType {
-        &self.tag
-    }
-
-    pub fn type_from(&self) -> Option<&syn::Type> {
-        self.type_from.as_ref()
-    }
-
-    pub fn type_try_from(&self) -> Option<&syn::Type> {
-        self.type_try_from.as_ref()
-    }
-
-    pub fn type_into(&self) -> Option<&syn::Type> {
-        self.type_into.as_ref()
-    }
-
-    pub fn remote(&self) -> Option<&syn::Path> {
-        self.remote.as_ref()
-    }
-
-    pub fn is_packed(&self) -> bool {
-        self.is_packed
-    }
-
-    pub fn identifier(&self) -> Identifier {
-        self.identifier
-    }
-
-    pub fn has_flatten(&self) -> bool {
-        self.has_flatten
-    }
-
-    pub fn mark_has_flatten(&mut self) {
-        self.has_flatten = true;
-    }
-
-    pub fn custom_serde_path(&self) -> Option<&syn::Path> {
-        self.serde_path.as_ref()
-    }
-
-    pub fn serde_path(&self) -> Cow<syn::Path> {
-        self.custom_serde_path()
-            .map_or_else(|| Cow::Owned(parse_quote!(_serde)), Cow::Borrowed)
-    }
-
-    /// Error message generated when type can't be deserialized.
-    /// If `None`, default message will be used
-    pub fn expecting(&self) -> Option<&str> {
-        self.expecting.as_ref().map(String::as_ref)
-    }
-
-    pub fn non_exhaustive(&self) -> bool {
-        self.non_exhaustive
-    }
-}
-
-fn decide_tag(
-    cx: &Ctxt,
-    item: &syn::DeriveInput,
-    untagged: BoolAttr,
-    internal_tag: Attr<String>,
-    content: Attr<String>,
-) -> TagType {
-    match (
-        untagged.0.get_with_tokens(),
-        internal_tag.get_with_tokens(),
-        content.get_with_tokens(),
-    ) {
-        (None, None, None) => TagType::External,
-        (Some(_), None, None) => TagType::None,
-        (None, Some((_, tag)), None) => {
-            // Check that there are no tuple variants.
-            if let syn::Data::Enum(data) = &item.data {
-                for variant in &data.variants {
-                    match &variant.fields {
-                        syn::Fields::Named(_) | syn::Fields::Unit => {}
-                        syn::Fields::Unnamed(fields) => {
-                            if fields.unnamed.len() != 1 {
-                                let msg =
-                                    "#[serde(tag = \"...\")] cannot be used with tuple variants";
-                                cx.error_spanned_by(variant, msg);
-                                break;
-                            }
-                        }
-                    }
-                }
-            }
-            TagType::Internal { tag }
-        }
-        (Some((untagged_tokens, ())), Some((tag_tokens, _)), None) => {
-            let msg = "enum cannot be both untagged and internally tagged";
-            cx.error_spanned_by(untagged_tokens, msg);
-            cx.error_spanned_by(tag_tokens, msg);
-            TagType::External // doesn't matter, will error
-        }
-        (None, None, Some((content_tokens, _))) => {
-            let msg = "#[serde(tag = \"...\", content = \"...\")] must be used together";
-            cx.error_spanned_by(content_tokens, msg);
-            TagType::External
-        }
-        (Some((untagged_tokens, ())), None, Some((content_tokens, _))) => {
-            let msg = "untagged enum cannot have #[serde(content = \"...\")]";
-            cx.error_spanned_by(untagged_tokens, msg);
-            cx.error_spanned_by(content_tokens, msg);
-            TagType::External
-        }
-        (None, Some((_, tag)), Some((_, content))) => TagType::Adjacent { tag, content },
-        (Some((untagged_tokens, ())), Some((tag_tokens, _)), Some((content_tokens, _))) => {
-            let msg = "untagged enum cannot have #[serde(tag = \"...\", content = \"...\")]";
-            cx.error_spanned_by(untagged_tokens, msg);
-            cx.error_spanned_by(tag_tokens, msg);
-            cx.error_spanned_by(content_tokens, msg);
-            TagType::External
-        }
-    }
-}
-
-fn decide_identifier(
-    cx: &Ctxt,
-    item: &syn::DeriveInput,
-    field_identifier: BoolAttr,
-    variant_identifier: BoolAttr,
-) -> Identifier {
-    match (
-        &item.data,
-        field_identifier.0.get_with_tokens(),
-        variant_identifier.0.get_with_tokens(),
-    ) {
-        (_, None, None) => Identifier::No,
-        (_, Some((field_identifier_tokens, ())), Some((variant_identifier_tokens, ()))) => {
-            let msg =
-                "#[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set";
-            cx.error_spanned_by(field_identifier_tokens, msg);
-            cx.error_spanned_by(variant_identifier_tokens, msg);
-            Identifier::No
-        }
-        (syn::Data::Enum(_), Some(_), None) => Identifier::Field,
-        (syn::Data::Enum(_), None, Some(_)) => Identifier::Variant,
-        (syn::Data::Struct(syn::DataStruct { struct_token, .. }), Some(_), None) => {
-            let msg = "#[serde(field_identifier)] can only be used on an enum";
-            cx.error_spanned_by(struct_token, msg);
-            Identifier::No
-        }
-        (syn::Data::Union(syn::DataUnion { union_token, .. }), Some(_), None) => {
-            let msg = "#[serde(field_identifier)] can only be used on an enum";
-            cx.error_spanned_by(union_token, msg);
-            Identifier::No
-        }
-        (syn::Data::Struct(syn::DataStruct { struct_token, .. }), None, Some(_)) => {
-            let msg = "#[serde(variant_identifier)] can only be used on an enum";
-            cx.error_spanned_by(struct_token, msg);
-            Identifier::No
-        }
-        (syn::Data::Union(syn::DataUnion { union_token, .. }), None, Some(_)) => {
-            let msg = "#[serde(variant_identifier)] can only be used on an enum";
-            cx.error_spanned_by(union_token, msg);
-            Identifier::No
-        }
-    }
-}
-
-/// Represents variant attribute information
-pub struct Variant {
-    name: Name,
-    rename_all_rules: RenameAllRules,
-    ser_bound: Option<Vec<syn::WherePredicate>>,
-    de_bound: Option<Vec<syn::WherePredicate>>,
-    skip_deserializing: bool,
-    skip_serializing: bool,
-    other: bool,
-    serialize_with: Option<syn::ExprPath>,
-    deserialize_with: Option<syn::ExprPath>,
-    borrow: Option<BorrowAttribute>,
-    untagged: bool,
-}
-
-struct BorrowAttribute {
-    path: syn::Path,
-    lifetimes: Option<BTreeSet<syn::Lifetime>>,
-}
-
-impl Variant {
-    pub fn from_ast(cx: &Ctxt, variant: &syn::Variant) -> Self {
-        let mut ser_name = Attr::none(cx, RENAME);
-        let mut de_name = Attr::none(cx, RENAME);
-        let mut de_aliases = VecAttr::none(cx, RENAME);
-        let mut skip_deserializing = BoolAttr::none(cx, SKIP_DESERIALIZING);
-        let mut skip_serializing = BoolAttr::none(cx, SKIP_SERIALIZING);
-        let mut rename_all_ser_rule = Attr::none(cx, RENAME_ALL);
-        let mut rename_all_de_rule = Attr::none(cx, RENAME_ALL);
-        let mut ser_bound = Attr::none(cx, BOUND);
-        let mut de_bound = Attr::none(cx, BOUND);
-        let mut other = BoolAttr::none(cx, OTHER);
-        let mut serialize_with = Attr::none(cx, SERIALIZE_WITH);
-        let mut deserialize_with = Attr::none(cx, DESERIALIZE_WITH);
-        let mut borrow = Attr::none(cx, BORROW);
-        let mut untagged = BoolAttr::none(cx, UNTAGGED);
-
-        for attr in &variant.attrs {
-            if attr.path() != SERDE {
-                continue;
-            }
-
-            if let syn::Meta::List(meta) = &attr.meta {
-                if meta.tokens.is_empty() {
-                    continue;
-                }
-            }
-
-            if let Err(err) = attr.parse_nested_meta(|meta| {
-                if meta.path == RENAME {
-                    // #[serde(rename = "foo")]
-                    // #[serde(rename(serialize = "foo", deserialize = "bar"))]
-                    let (ser, de) = get_multiple_renames(cx, &meta)?;
-                    ser_name.set_opt(&meta.path, ser.as_ref().map(syn::LitStr::value));
-                    for de_value in de {
-                        de_name.set_if_none(de_value.value());
-                        de_aliases.insert(&meta.path, de_value.value());
-                    }
-                } else if meta.path == ALIAS {
-                    // #[serde(alias = "foo")]
-                    if let Some(s) = get_lit_str(cx, ALIAS, &meta)? {
-                        de_aliases.insert(&meta.path, s.value());
-                    }
-                } else if meta.path == RENAME_ALL {
-                    // #[serde(rename_all = "foo")]
-                    // #[serde(rename_all(serialize = "foo", deserialize = "bar"))]
-                    let one_name = meta.input.peek(Token![=]);
-                    let (ser, de) = get_renames(cx, RENAME_ALL, &meta)?;
-                    if let Some(ser) = ser {
-                        match RenameRule::from_str(&ser.value()) {
-                            Ok(rename_rule) => rename_all_ser_rule.set(&meta.path, rename_rule),
-                            Err(err) => cx.error_spanned_by(ser, err),
-                        }
-                    }
-                    if let Some(de) = de {
-                        match RenameRule::from_str(&de.value()) {
-                            Ok(rename_rule) => rename_all_de_rule.set(&meta.path, rename_rule),
-                            Err(err) => {
-                                if !one_name {
-                                    cx.error_spanned_by(de, err);
-                                }
-                            }
-                        }
-                    }
-                } else if meta.path == SKIP {
-                    // #[serde(skip)]
-                    skip_serializing.set_true(&meta.path);
-                    skip_deserializing.set_true(&meta.path);
-                } else if meta.path == SKIP_DESERIALIZING {
-                    // #[serde(skip_deserializing)]
-                    skip_deserializing.set_true(&meta.path);
-                } else if meta.path == SKIP_SERIALIZING {
-                    // #[serde(skip_serializing)]
-                    skip_serializing.set_true(&meta.path);
-                } else if meta.path == OTHER {
-                    // #[serde(other)]
-                    other.set_true(&meta.path);
-                } else if meta.path == BOUND {
-                    // #[serde(bound = "T: SomeBound")]
-                    // #[serde(bound(serialize = "...", deserialize = "..."))]
-                    let (ser, de) = get_where_predicates(cx, &meta)?;
-                    ser_bound.set_opt(&meta.path, ser);
-                    de_bound.set_opt(&meta.path, de);
-                } else if meta.path == WITH {
-                    // #[serde(with = "...")]
-                    if let Some(path) = parse_lit_into_expr_path(cx, WITH, &meta)? {
-                        let mut ser_path = path.clone();
-                        ser_path
-                            .path
-                            .segments
-                            .push(Ident::new("serialize", Span::call_site()).into());
-                        serialize_with.set(&meta.path, ser_path);
-                        let mut de_path = path;
-                        de_path
-                            .path
-                            .segments
-                            .push(Ident::new("deserialize", Span::call_site()).into());
-                        deserialize_with.set(&meta.path, de_path);
-                    }
-                } else if meta.path == SERIALIZE_WITH {
-                    // #[serde(serialize_with = "...")]
-                    if let Some(path) = parse_lit_into_expr_path(cx, SERIALIZE_WITH, &meta)? {
-                        serialize_with.set(&meta.path, path);
-                    }
-                } else if meta.path == DESERIALIZE_WITH {
-                    // #[serde(deserialize_with = "...")]
-                    if let Some(path) = parse_lit_into_expr_path(cx, DESERIALIZE_WITH, &meta)? {
-                        deserialize_with.set(&meta.path, path);
-                    }
-                } else if meta.path == BORROW {
-                    let borrow_attribute = if meta.input.peek(Token![=]) {
-                        // #[serde(borrow = "'a + 'b")]
-                        let lifetimes = parse_lit_into_lifetimes(cx, &meta)?;
-                        BorrowAttribute {
-                            path: meta.path.clone(),
-                            lifetimes: Some(lifetimes),
-                        }
-                    } else {
-                        // #[serde(borrow)]
-                        BorrowAttribute {
-                            path: meta.path.clone(),
-                            lifetimes: None,
-                        }
-                    };
-                    match &variant.fields {
-                        syn::Fields::Unnamed(fields) if fields.unnamed.len() == 1 => {
-                            borrow.set(&meta.path, borrow_attribute);
-                        }
-                        _ => {
-                            let msg = "#[serde(borrow)] may only be used on newtype variants";
-                            cx.error_spanned_by(variant, msg);
-                        }
-                    }
-                } else if meta.path == UNTAGGED {
-                    untagged.set_true(&meta.path);
-                } else {
-                    let path = meta.path.to_token_stream().to_string().replace(' ', "");
-                    return Err(
-                        meta.error(format_args!("unknown serde variant attribute `{}`", path))
-                    );
-                }
-                Ok(())
-            }) {
-                cx.syn_error(err);
-            }
-        }
-
-        Variant {
-            name: Name::from_attrs(unraw(&variant.ident), ser_name, de_name, Some(de_aliases)),
-            rename_all_rules: RenameAllRules {
-                serialize: rename_all_ser_rule.get().unwrap_or(RenameRule::None),
-                deserialize: rename_all_de_rule.get().unwrap_or(RenameRule::None),
-            },
-            ser_bound: ser_bound.get(),
-            de_bound: de_bound.get(),
-            skip_deserializing: skip_deserializing.get(),
-            skip_serializing: skip_serializing.get(),
-            other: other.get(),
-            serialize_with: serialize_with.get(),
-            deserialize_with: deserialize_with.get(),
-            borrow: borrow.get(),
-            untagged: untagged.get(),
-        }
-    }
-
-    pub fn name(&self) -> &Name {
-        &self.name
-    }
-
-    pub fn aliases(&self) -> &BTreeSet<String> {
-        self.name.deserialize_aliases()
-    }
-
-    pub fn rename_by_rules(&mut self, rules: RenameAllRules) {
-        if !self.name.serialize_renamed {
-            self.name.serialize = rules.serialize.apply_to_variant(&self.name.serialize);
-        }
-        if !self.name.deserialize_renamed {
-            self.name.deserialize = rules.deserialize.apply_to_variant(&self.name.deserialize);
-        }
-        self.name
-            .deserialize_aliases
-            .insert(self.name.deserialize.clone());
-    }
-
-    pub fn rename_all_rules(&self) -> RenameAllRules {
-        self.rename_all_rules
-    }
-
-    pub fn ser_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.ser_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn de_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.de_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn skip_deserializing(&self) -> bool {
-        self.skip_deserializing
-    }
-
-    pub fn skip_serializing(&self) -> bool {
-        self.skip_serializing
-    }
-
-    pub fn other(&self) -> bool {
-        self.other
-    }
-
-    pub fn serialize_with(&self) -> Option<&syn::ExprPath> {
-        self.serialize_with.as_ref()
-    }
-
-    pub fn deserialize_with(&self) -> Option<&syn::ExprPath> {
-        self.deserialize_with.as_ref()
-    }
-
-    pub fn untagged(&self) -> bool {
-        self.untagged
-    }
-}
-
-/// Represents field attribute information
-pub struct Field {
-    name: Name,
-    skip_serializing: bool,
-    skip_deserializing: bool,
-    skip_serializing_if: Option<syn::ExprPath>,
-    default: Default,
-    serialize_with: Option<syn::ExprPath>,
-    deserialize_with: Option<syn::ExprPath>,
-    ser_bound: Option<Vec<syn::WherePredicate>>,
-    de_bound: Option<Vec<syn::WherePredicate>>,
-    borrowed_lifetimes: BTreeSet<syn::Lifetime>,
-    getter: Option<syn::ExprPath>,
-    flatten: bool,
-    transparent: bool,
-}
-
-/// Represents the default to use for a field when deserializing.
-pub enum Default {
-    /// Field must always be specified because it does not have a default.
-    None,
-    /// The default is given by `std::default::Default::default()`.
-    Default,
-    /// The default is given by this function.
-    Path(syn::ExprPath),
-}
-
-impl Default {
-    pub fn is_none(&self) -> bool {
-        match self {
-            Default::None => true,
-            Default::Default | Default::Path(_) => false,
-        }
-    }
-}
-
-impl Field {
-    /// Extract out the `#[serde(...)]` attributes from a struct field.
-    pub fn from_ast(
-        cx: &Ctxt,
-        index: usize,
-        field: &syn::Field,
-        attrs: Option<&Variant>,
-        container_default: &Default,
-    ) -> Self {
-        let mut ser_name = Attr::none(cx, RENAME);
-        let mut de_name = Attr::none(cx, RENAME);
-        let mut de_aliases = VecAttr::none(cx, RENAME);
-        let mut skip_serializing = BoolAttr::none(cx, SKIP_SERIALIZING);
-        let mut skip_deserializing = BoolAttr::none(cx, SKIP_DESERIALIZING);
-        let mut skip_serializing_if = Attr::none(cx, SKIP_SERIALIZING_IF);
-        let mut default = Attr::none(cx, DEFAULT);
-        let mut serialize_with = Attr::none(cx, SERIALIZE_WITH);
-        let mut deserialize_with = Attr::none(cx, DESERIALIZE_WITH);
-        let mut ser_bound = Attr::none(cx, BOUND);
-        let mut de_bound = Attr::none(cx, BOUND);
-        let mut borrowed_lifetimes = Attr::none(cx, BORROW);
-        let mut getter = Attr::none(cx, GETTER);
-        let mut flatten = BoolAttr::none(cx, FLATTEN);
-
-        let ident = match &field.ident {
-            Some(ident) => unraw(ident),
-            None => index.to_string(),
-        };
-
-        if let Some(borrow_attribute) = attrs.and_then(|variant| variant.borrow.as_ref()) {
-            if let Ok(borrowable) = borrowable_lifetimes(cx, &ident, field) {
-                if let Some(lifetimes) = &borrow_attribute.lifetimes {
-                    for lifetime in lifetimes {
-                        if !borrowable.contains(lifetime) {
-                            let msg =
-                                format!("field `{}` does not have lifetime {}", ident, lifetime);
-                            cx.error_spanned_by(field, msg);
-                        }
-                    }
-                    borrowed_lifetimes.set(&borrow_attribute.path, lifetimes.clone());
-                } else {
-                    borrowed_lifetimes.set(&borrow_attribute.path, borrowable);
-                }
-            }
-        }
-
-        for attr in &field.attrs {
-            if attr.path() != SERDE {
-                continue;
-            }
-
-            if let syn::Meta::List(meta) = &attr.meta {
-                if meta.tokens.is_empty() {
-                    continue;
-                }
-            }
-
-            if let Err(err) = attr.parse_nested_meta(|meta| {
-                if meta.path == RENAME {
-                    // #[serde(rename = "foo")]
-                    // #[serde(rename(serialize = "foo", deserialize = "bar"))]
-                    let (ser, de) = get_multiple_renames(cx, &meta)?;
-                    ser_name.set_opt(&meta.path, ser.as_ref().map(syn::LitStr::value));
-                    for de_value in de {
-                        de_name.set_if_none(de_value.value());
-                        de_aliases.insert(&meta.path, de_value.value());
-                    }
-                } else if meta.path == ALIAS {
-                    // #[serde(alias = "foo")]
-                    if let Some(s) = get_lit_str(cx, ALIAS, &meta)? {
-                        de_aliases.insert(&meta.path, s.value());
-                    }
-                } else if meta.path == DEFAULT {
-                    if meta.input.peek(Token![=]) {
-                        // #[serde(default = "...")]
-                        if let Some(path) = parse_lit_into_expr_path(cx, DEFAULT, &meta)? {
-                            default.set(&meta.path, Default::Path(path));
-                        }
-                    } else {
-                        // #[serde(default)]
-                        default.set(&meta.path, Default::Default);
-                    }
-                } else if meta.path == SKIP_SERIALIZING {
-                    // #[serde(skip_serializing)]
-                    skip_serializing.set_true(&meta.path);
-                } else if meta.path == SKIP_DESERIALIZING {
-                    // #[serde(skip_deserializing)]
-                    skip_deserializing.set_true(&meta.path);
-                } else if meta.path == SKIP {
-                    // #[serde(skip)]
-                    skip_serializing.set_true(&meta.path);
-                    skip_deserializing.set_true(&meta.path);
-                } else if meta.path == SKIP_SERIALIZING_IF {
-                    // #[serde(skip_serializing_if = "...")]
-                    if let Some(path) = parse_lit_into_expr_path(cx, SKIP_SERIALIZING_IF, &meta)? {
-                        skip_serializing_if.set(&meta.path, path);
-                    }
-                } else if meta.path == SERIALIZE_WITH {
-                    // #[serde(serialize_with = "...")]
-                    if let Some(path) = parse_lit_into_expr_path(cx, SERIALIZE_WITH, &meta)? {
-                        serialize_with.set(&meta.path, path);
-                    }
-                } else if meta.path == DESERIALIZE_WITH {
-                    // #[serde(deserialize_with = "...")]
-                    if let Some(path) = parse_lit_into_expr_path(cx, DESERIALIZE_WITH, &meta)? {
-                        deserialize_with.set(&meta.path, path);
-                    }
-                } else if meta.path == WITH {
-                    // #[serde(with = "...")]
-                    if let Some(path) = parse_lit_into_expr_path(cx, WITH, &meta)? {
-                        let mut ser_path = path.clone();
-                        ser_path
-                            .path
-                            .segments
-                            .push(Ident::new("serialize", Span::call_site()).into());
-                        serialize_with.set(&meta.path, ser_path);
-                        let mut de_path = path;
-                        de_path
-                            .path
-                            .segments
-                            .push(Ident::new("deserialize", Span::call_site()).into());
-                        deserialize_with.set(&meta.path, de_path);
-                    }
-                } else if meta.path == BOUND {
-                    // #[serde(bound = "T: SomeBound")]
-                    // #[serde(bound(serialize = "...", deserialize = "..."))]
-                    let (ser, de) = get_where_predicates(cx, &meta)?;
-                    ser_bound.set_opt(&meta.path, ser);
-                    de_bound.set_opt(&meta.path, de);
-                } else if meta.path == BORROW {
-                    if meta.input.peek(Token![=]) {
-                        // #[serde(borrow = "'a + 'b")]
-                        let lifetimes = parse_lit_into_lifetimes(cx, &meta)?;
-                        if let Ok(borrowable) = borrowable_lifetimes(cx, &ident, field) {
-                            for lifetime in &lifetimes {
-                                if !borrowable.contains(lifetime) {
-                                    let msg = format!(
-                                        "field `{}` does not have lifetime {}",
-                                        ident, lifetime,
-                                    );
-                                    cx.error_spanned_by(field, msg);
-                                }
-                            }
-                            borrowed_lifetimes.set(&meta.path, lifetimes);
-                        }
-                    } else {
-                        // #[serde(borrow)]
-                        if let Ok(borrowable) = borrowable_lifetimes(cx, &ident, field) {
-                            borrowed_lifetimes.set(&meta.path, borrowable);
-                        }
-                    }
-                } else if meta.path == GETTER {
-                    // #[serde(getter = "...")]
-                    if let Some(path) = parse_lit_into_expr_path(cx, GETTER, &meta)? {
-                        getter.set(&meta.path, path);
-                    }
-                } else if meta.path == FLATTEN {
-                    // #[serde(flatten)]
-                    flatten.set_true(&meta.path);
-                } else {
-                    let path = meta.path.to_token_stream().to_string().replace(' ', "");
-                    return Err(
-                        meta.error(format_args!("unknown serde field attribute `{}`", path))
-                    );
-                }
-                Ok(())
-            }) {
-                cx.syn_error(err);
-            }
-        }
-
-        // Is skip_deserializing, initialize the field to Default::default() unless a
-        // different default is specified by `#[serde(default = "...")]` on
-        // ourselves or our container (e.g. the struct we are in).
-        if let Default::None = *container_default {
-            if skip_deserializing.0.value.is_some() {
-                default.set_if_none(Default::Default);
-            }
-        }
-
-        let mut borrowed_lifetimes = borrowed_lifetimes.get().unwrap_or_default();
-        if !borrowed_lifetimes.is_empty() {
-            // Cow<str> and Cow<[u8]> never borrow by default:
-            //
-            //     impl<'de, 'a, T: ?Sized> Deserialize<'de> for Cow<'a, T>
-            //
-            // A #[serde(borrow)] attribute enables borrowing that corresponds
-            // roughly to these impls:
-            //
-            //     impl<'de: 'a, 'a> Deserialize<'de> for Cow<'a, str>
-            //     impl<'de: 'a, 'a> Deserialize<'de> for Cow<'a, [u8]>
-            if is_cow(&field.ty, is_str) {
-                let mut path = syn::Path {
-                    leading_colon: None,
-                    segments: Punctuated::new(),
-                };
-                let span = Span::call_site();
-                path.segments.push(Ident::new("_serde", span).into());
-                path.segments.push(Ident::new("__private", span).into());
-                path.segments.push(Ident::new("de", span).into());
-                path.segments
-                    .push(Ident::new("borrow_cow_str", span).into());
-                let expr = syn::ExprPath {
-                    attrs: Vec::new(),
-                    qself: None,
-                    path,
-                };
-                deserialize_with.set_if_none(expr);
-            } else if is_cow(&field.ty, is_slice_u8) {
-                let mut path = syn::Path {
-                    leading_colon: None,
-                    segments: Punctuated::new(),
-                };
-                let span = Span::call_site();
-                path.segments.push(Ident::new("_serde", span).into());
-                path.segments.push(Ident::new("__private", span).into());
-                path.segments.push(Ident::new("de", span).into());
-                path.segments
-                    .push(Ident::new("borrow_cow_bytes", span).into());
-                let expr = syn::ExprPath {
-                    attrs: Vec::new(),
-                    qself: None,
-                    path,
-                };
-                deserialize_with.set_if_none(expr);
-            }
-        } else if is_implicitly_borrowed(&field.ty) {
-            // Types &str and &[u8] are always implicitly borrowed. No need for
-            // a #[serde(borrow)].
-            collect_lifetimes(&field.ty, &mut borrowed_lifetimes);
-        }
-
-        Field {
-            name: Name::from_attrs(ident, ser_name, de_name, Some(de_aliases)),
-            skip_serializing: skip_serializing.get(),
-            skip_deserializing: skip_deserializing.get(),
-            skip_serializing_if: skip_serializing_if.get(),
-            default: default.get().unwrap_or(Default::None),
-            serialize_with: serialize_with.get(),
-            deserialize_with: deserialize_with.get(),
-            ser_bound: ser_bound.get(),
-            de_bound: de_bound.get(),
-            borrowed_lifetimes,
-            getter: getter.get(),
-            flatten: flatten.get(),
-            transparent: false,
-        }
-    }
-
-    pub fn name(&self) -> &Name {
-        &self.name
-    }
-
-    pub fn aliases(&self) -> &BTreeSet<String> {
-        self.name.deserialize_aliases()
-    }
-
-    pub fn rename_by_rules(&mut self, rules: RenameAllRules) {
-        if !self.name.serialize_renamed {
-            self.name.serialize = rules.serialize.apply_to_field(&self.name.serialize);
-        }
-        if !self.name.deserialize_renamed {
-            self.name.deserialize = rules.deserialize.apply_to_field(&self.name.deserialize);
-        }
-        self.name
-            .deserialize_aliases
-            .insert(self.name.deserialize.clone());
-    }
-
-    pub fn skip_serializing(&self) -> bool {
-        self.skip_serializing
-    }
-
-    pub fn skip_deserializing(&self) -> bool {
-        self.skip_deserializing
-    }
-
-    pub fn skip_serializing_if(&self) -> Option<&syn::ExprPath> {
-        self.skip_serializing_if.as_ref()
-    }
-
-    pub fn default(&self) -> &Default {
-        &self.default
-    }
-
-    pub fn serialize_with(&self) -> Option<&syn::ExprPath> {
-        self.serialize_with.as_ref()
-    }
-
-    pub fn deserialize_with(&self) -> Option<&syn::ExprPath> {
-        self.deserialize_with.as_ref()
-    }
-
-    pub fn ser_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.ser_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn de_bound(&self) -> Option<&[syn::WherePredicate]> {
-        self.de_bound.as_ref().map(|vec| &vec[..])
-    }
-
-    pub fn borrowed_lifetimes(&self) -> &BTreeSet<syn::Lifetime> {
-        &self.borrowed_lifetimes
-    }
-
-    pub fn getter(&self) -> Option<&syn::ExprPath> {
-        self.getter.as_ref()
-    }
-
-    pub fn flatten(&self) -> bool {
-        self.flatten
-    }
-
-    pub fn transparent(&self) -> bool {
-        self.transparent
-    }
-
-    pub fn mark_transparent(&mut self) {
-        self.transparent = true;
-    }
-}
-
-type SerAndDe<T> = (Option<T>, Option<T>);
-
-fn get_ser_and_de<'c, T, F, R>(
-    cx: &'c Ctxt,
-    attr_name: Symbol,
-    meta: &ParseNestedMeta,
-    f: F,
-) -> syn::Result<(VecAttr<'c, T>, VecAttr<'c, T>)>
-where
-    T: Clone,
-    F: Fn(&Ctxt, Symbol, Symbol, &ParseNestedMeta) -> syn::Result<R>,
-    R: Into<Option<T>>,
-{
-    let mut ser_meta = VecAttr::none(cx, attr_name);
-    let mut de_meta = VecAttr::none(cx, attr_name);
-
-    let lookahead = meta.input.lookahead1();
-    if lookahead.peek(Token![=]) {
-        if let Some(both) = f(cx, attr_name, attr_name, meta)?.into() {
-            ser_meta.insert(&meta.path, both.clone());
-            de_meta.insert(&meta.path, both);
-        }
-    } else if lookahead.peek(token::Paren) {
-        meta.parse_nested_meta(|meta| {
-            if meta.path == SERIALIZE {
-                if let Some(v) = f(cx, attr_name, SERIALIZE, &meta)?.into() {
-                    ser_meta.insert(&meta.path, v);
-                }
-            } else if meta.path == DESERIALIZE {
-                if let Some(v) = f(cx, attr_name, DESERIALIZE, &meta)?.into() {
-                    de_meta.insert(&meta.path, v);
-                }
-            } else {
-                return Err(meta.error(format_args!(
-                    "malformed {0} attribute, expected `{0}(serialize = ..., deserialize = ...)`",
-                    attr_name,
-                )));
-            }
-            Ok(())
-        })?;
-    } else {
-        return Err(lookahead.error());
-    }
-
-    Ok((ser_meta, de_meta))
-}
-
-fn get_renames(
-    cx: &Ctxt,
-    attr_name: Symbol,
-    meta: &ParseNestedMeta,
-) -> syn::Result<SerAndDe<syn::LitStr>> {
-    let (ser, de) = get_ser_and_de(cx, attr_name, meta, get_lit_str2)?;
-    Ok((ser.at_most_one(), de.at_most_one()))
-}
-
-fn get_multiple_renames(
-    cx: &Ctxt,
-    meta: &ParseNestedMeta,
-) -> syn::Result<(Option<syn::LitStr>, Vec<syn::LitStr>)> {
-    let (ser, de) = get_ser_and_de(cx, RENAME, meta, get_lit_str2)?;
-    Ok((ser.at_most_one(), de.get()))
-}
-
-fn get_where_predicates(
-    cx: &Ctxt,
-    meta: &ParseNestedMeta,
-) -> syn::Result<SerAndDe<Vec<syn::WherePredicate>>> {
-    let (ser, de) = get_ser_and_de(cx, BOUND, meta, parse_lit_into_where)?;
-    Ok((ser.at_most_one(), de.at_most_one()))
-}
-
-fn get_lit_str(
-    cx: &Ctxt,
-    attr_name: Symbol,
-    meta: &ParseNestedMeta,
-) -> syn::Result<Option<syn::LitStr>> {
-    get_lit_str2(cx, attr_name, attr_name, meta)
-}
-
-fn get_lit_str2(
-    cx: &Ctxt,
-    attr_name: Symbol,
-    meta_item_name: Symbol,
-    meta: &ParseNestedMeta,
-) -> syn::Result<Option<syn::LitStr>> {
-    let expr: syn::Expr = meta.value()?.parse()?;
-    let mut value = &expr;
-    while let syn::Expr::Group(e) = value {
-        value = &e.expr;
-    }
-    if let syn::Expr::Lit(syn::ExprLit {
-        lit: syn::Lit::Str(lit),
-        ..
-    }) = value
-    {
-        let suffix = lit.suffix();
-        if !suffix.is_empty() {
-            cx.error_spanned_by(
-                lit,
-                format!("unexpected suffix `{}` on string literal", suffix),
-            );
-        }
-        Ok(Some(lit.clone()))
-    } else {
-        cx.error_spanned_by(
-            expr,
-            format!(
-                "expected serde {} attribute to be a string: `{} = \"...\"`",
-                attr_name, meta_item_name
-            ),
-        );
-        Ok(None)
-    }
-}
-
-fn parse_lit_into_path(
-    cx: &Ctxt,
-    attr_name: Symbol,
-    meta: &ParseNestedMeta,
-) -> syn::Result<Option<syn::Path>> {
-    let string = match get_lit_str(cx, attr_name, meta)? {
-        Some(string) => string,
-        None => return Ok(None),
-    };
-
-    Ok(match string.parse() {
-        Ok(path) => Some(path),
-        Err(_) => {
-            cx.error_spanned_by(
-                &string,
-                format!("failed to parse path: {:?}", string.value()),
-            );
-            None
-        }
-    })
-}
-
-fn parse_lit_into_expr_path(
-    cx: &Ctxt,
-    attr_name: Symbol,
-    meta: &ParseNestedMeta,
-) -> syn::Result<Option<syn::ExprPath>> {
-    let string = match get_lit_str(cx, attr_name, meta)? {
-        Some(string) => string,
-        None => return Ok(None),
-    };
-
-    Ok(match string.parse() {
-        Ok(expr) => Some(expr),
-        Err(_) => {
-            cx.error_spanned_by(
-                &string,
-                format!("failed to parse path: {:?}", string.value()),
-            );
-            None
-        }
-    })
-}
-
-fn parse_lit_into_where(
-    cx: &Ctxt,
-    attr_name: Symbol,
-    meta_item_name: Symbol,
-    meta: &ParseNestedMeta,
-) -> syn::Result<Vec<syn::WherePredicate>> {
-    let string = match get_lit_str2(cx, attr_name, meta_item_name, meta)? {
-        Some(string) => string,
-        None => return Ok(Vec::new()),
-    };
-
-    Ok(
-        match string.parse_with(Punctuated::<syn::WherePredicate, Token![,]>::parse_terminated) {
-            Ok(predicates) => Vec::from_iter(predicates),
-            Err(err) => {
-                cx.error_spanned_by(string, err);
-                Vec::new()
-            }
-        },
-    )
-}
-
-fn parse_lit_into_ty(
-    cx: &Ctxt,
-    attr_name: Symbol,
-    meta: &ParseNestedMeta,
-) -> syn::Result<Option<syn::Type>> {
-    let string = match get_lit_str(cx, attr_name, meta)? {
-        Some(string) => string,
-        None => return Ok(None),
-    };
-
-    Ok(match string.parse() {
-        Ok(ty) => Some(ty),
-        Err(_) => {
-            cx.error_spanned_by(
-                &string,
-                format!("failed to parse type: {} = {:?}", attr_name, string.value()),
-            );
-            None
-        }
-    })
-}
-
-// Parses a string literal like "'a + 'b + 'c" containing a nonempty list of
-// lifetimes separated by `+`.
-fn parse_lit_into_lifetimes(
-    cx: &Ctxt,
-    meta: &ParseNestedMeta,
-) -> syn::Result<BTreeSet<syn::Lifetime>> {
-    let string = match get_lit_str(cx, BORROW, meta)? {
-        Some(string) => string,
-        None => return Ok(BTreeSet::new()),
-    };
-
-    if let Ok(lifetimes) = string.parse_with(|input: ParseStream| {
-        let mut set = BTreeSet::new();
-        while !input.is_empty() {
-            let lifetime: Lifetime = input.parse()?;
-            if !set.insert(lifetime.clone()) {
-                cx.error_spanned_by(
-                    &string,
-                    format!("duplicate borrowed lifetime `{}`", lifetime),
-                );
-            }
-            if input.is_empty() {
-                break;
-            }
-            input.parse::<Token![+]>()?;
-        }
-        Ok(set)
-    }) {
-        if lifetimes.is_empty() {
-            cx.error_spanned_by(string, "at least one lifetime must be borrowed");
-        }
-        return Ok(lifetimes);
-    }
-
-    cx.error_spanned_by(
-        &string,
-        format!("failed to parse borrowed lifetimes: {:?}", string.value()),
-    );
-    Ok(BTreeSet::new())
-}
-
-fn is_implicitly_borrowed(ty: &syn::Type) -> bool {
-    is_implicitly_borrowed_reference(ty) || is_option(ty, is_implicitly_borrowed_reference)
-}
-
-fn is_implicitly_borrowed_reference(ty: &syn::Type) -> bool {
-    is_reference(ty, is_str) || is_reference(ty, is_slice_u8)
-}
-
-// Whether the type looks like it might be `std::borrow::Cow<T>` where elem="T".
-// This can have false negatives and false positives.
-//
-// False negative:
-//
-//     use std::borrow::Cow as Pig;
-//
-//     #[derive(Deserialize)]
-//     struct S<'a> {
-//         #[serde(borrow)]
-//         pig: Pig<'a, str>,
-//     }
-//
-// False positive:
-//
-//     type str = [i16];
-//
-//     #[derive(Deserialize)]
-//     struct S<'a> {
-//         #[serde(borrow)]
-//         cow: Cow<'a, str>,
-//     }
-fn is_cow(ty: &syn::Type, elem: fn(&syn::Type) -> bool) -> bool {
-    let path = match ungroup(ty) {
-        syn::Type::Path(ty) => &ty.path,
-        _ => {
-            return false;
-        }
-    };
-    let seg = match path.segments.last() {
-        Some(seg) => seg,
-        None => {
-            return false;
-        }
-    };
-    let args = match &seg.arguments {
-        syn::PathArguments::AngleBracketed(bracketed) => &bracketed.args,
-        _ => {
-            return false;
-        }
-    };
-    seg.ident == "Cow"
-        && args.len() == 2
-        && match (&args[0], &args[1]) {
-            (syn::GenericArgument::Lifetime(_), syn::GenericArgument::Type(arg)) => elem(arg),
-            _ => false,
-        }
-}
-
-fn is_option(ty: &syn::Type, elem: fn(&syn::Type) -> bool) -> bool {
-    let path = match ungroup(ty) {
-        syn::Type::Path(ty) => &ty.path,
-        _ => {
-            return false;
-        }
-    };
-    let seg = match path.segments.last() {
-        Some(seg) => seg,
-        None => {
-            return false;
-        }
-    };
-    let args = match &seg.arguments {
-        syn::PathArguments::AngleBracketed(bracketed) => &bracketed.args,
-        _ => {
-            return false;
-        }
-    };
-    seg.ident == "Option"
-        && args.len() == 1
-        && match &args[0] {
-            syn::GenericArgument::Type(arg) => elem(arg),
-            _ => false,
-        }
-}
-
-// Whether the type looks like it might be `&T` where elem="T". This can have
-// false negatives and false positives.
-//
-// False negative:
-//
-//     type Yarn = str;
-//
-//     #[derive(Deserialize)]
-//     struct S<'a> {
-//         r: &'a Yarn,
-//     }
-//
-// False positive:
-//
-//     type str = [i16];
-//
-//     #[derive(Deserialize)]
-//     struct S<'a> {
-//         r: &'a str,
-//     }
-fn is_reference(ty: &syn::Type, elem: fn(&syn::Type) -> bool) -> bool {
-    match ungroup(ty) {
-        syn::Type::Reference(ty) => ty.mutability.is_none() && elem(&ty.elem),
-        _ => false,
-    }
-}
-
-fn is_str(ty: &syn::Type) -> bool {
-    is_primitive_type(ty, "str")
-}
-
-fn is_slice_u8(ty: &syn::Type) -> bool {
-    match ungroup(ty) {
-        syn::Type::Slice(ty) => is_primitive_type(&ty.elem, "u8"),
-        _ => false,
-    }
-}
-
-fn is_primitive_type(ty: &syn::Type, primitive: &str) -> bool {
-    match ungroup(ty) {
-        syn::Type::Path(ty) => ty.qself.is_none() && is_primitive_path(&ty.path, primitive),
-        _ => false,
-    }
-}
-
-fn is_primitive_path(path: &syn::Path, primitive: &str) -> bool {
-    path.leading_colon.is_none()
-        && path.segments.len() == 1
-        && path.segments[0].ident == primitive
-        && path.segments[0].arguments.is_empty()
-}
-
-// All lifetimes that this type could borrow from a Deserializer.
-//
-// For example a type `S<'a, 'b>` could borrow `'a` and `'b`. On the other hand
-// a type `for<'a> fn(&'a str)` could not borrow `'a` from the Deserializer.
-//
-// This is used when there is an explicit or implicit `#[serde(borrow)]`
-// attribute on the field so there must be at least one borrowable lifetime.
-fn borrowable_lifetimes(
-    cx: &Ctxt,
-    name: &str,
-    field: &syn::Field,
-) -> Result<BTreeSet<syn::Lifetime>, ()> {
-    let mut lifetimes = BTreeSet::new();
-    collect_lifetimes(&field.ty, &mut lifetimes);
-    if lifetimes.is_empty() {
-        let msg = format!("field `{}` has no lifetimes to borrow", name);
-        cx.error_spanned_by(field, msg);
-        Err(())
-    } else {
-        Ok(lifetimes)
-    }
-}
-
-fn collect_lifetimes(ty: &syn::Type, out: &mut BTreeSet<syn::Lifetime>) {
-    match ty {
-        #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
-        syn::Type::Slice(ty) => {
-            collect_lifetimes(&ty.elem, out);
-        }
-        syn::Type::Array(ty) => {
-            collect_lifetimes(&ty.elem, out);
-        }
-        syn::Type::Ptr(ty) => {
-            collect_lifetimes(&ty.elem, out);
-        }
-        syn::Type::Reference(ty) => {
-            out.extend(ty.lifetime.iter().cloned());
-            collect_lifetimes(&ty.elem, out);
-        }
-        syn::Type::Tuple(ty) => {
-            for elem in &ty.elems {
-                collect_lifetimes(elem, out);
-            }
-        }
-        syn::Type::Path(ty) => {
-            if let Some(qself) = &ty.qself {
-                collect_lifetimes(&qself.ty, out);
-            }
-            for seg in &ty.path.segments {
-                if let syn::PathArguments::AngleBracketed(bracketed) = &seg.arguments {
-                    for arg in &bracketed.args {
-                        match arg {
-                            syn::GenericArgument::Lifetime(lifetime) => {
-                                out.insert(lifetime.clone());
-                            }
-                            syn::GenericArgument::Type(ty) => {
-                                collect_lifetimes(ty, out);
-                            }
-                            syn::GenericArgument::AssocType(binding) => {
-                                collect_lifetimes(&binding.ty, out);
-                            }
-                            syn::GenericArgument::Const(_)
-                            | syn::GenericArgument::AssocConst(_)
-                            | syn::GenericArgument::Constraint(_)
-                            | _ => {}
-                        }
-                    }
-                }
-            }
-        }
-        syn::Type::Paren(ty) => {
-            collect_lifetimes(&ty.elem, out);
-        }
-        syn::Type::Group(ty) => {
-            collect_lifetimes(&ty.elem, out);
-        }
-        syn::Type::Macro(ty) => {
-            collect_lifetimes_from_tokens(ty.mac.tokens.clone(), out);
-        }
-        syn::Type::BareFn(_)
-        | syn::Type::Never(_)
-        | syn::Type::TraitObject(_)
-        | syn::Type::ImplTrait(_)
-        | syn::Type::Infer(_)
-        | syn::Type::Verbatim(_) => {}
-
-        _ => {}
-    }
-}
-
-fn collect_lifetimes_from_tokens(tokens: TokenStream, out: &mut BTreeSet<syn::Lifetime>) {
-    let mut iter = tokens.into_iter();
-    while let Some(tt) = iter.next() {
-        match &tt {
-            TokenTree::Punct(op) if op.as_char() == '\'' && op.spacing() == Spacing::Joint => {
-                if let Some(TokenTree::Ident(ident)) = iter.next() {
-                    out.insert(syn::Lifetime {
-                        apostrophe: op.span(),
-                        ident,
-                    });
-                }
-            }
-            TokenTree::Group(group) => {
-                let tokens = group.stream();
-                collect_lifetimes_from_tokens(tokens, out);
-            }
-            _ => {}
-        }
-    }
-}
diff --git a/vendor/serde_derive/src/internals/case.rs b/vendor/serde_derive/src/internals/case.rs
deleted file mode 100644
index 8c8c02e..0000000
--- a/vendor/serde_derive/src/internals/case.rs
+++ /dev/null
@@ -1,200 +0,0 @@
-//! Code to convert the Rust-styled field/variant (e.g. `my_field`, `MyType`) to the
-//! case of the source (e.g. `my-field`, `MY_FIELD`).
-
-use self::RenameRule::*;
-use std::fmt::{self, Debug, Display};
-
-/// The different possible ways to change case of fields in a struct, or variants in an enum.
-#[derive(Copy, Clone, PartialEq)]
-pub enum RenameRule {
-    /// Don't apply a default rename rule.
-    None,
-    /// Rename direct children to "lowercase" style.
-    LowerCase,
-    /// Rename direct children to "UPPERCASE" style.
-    UpperCase,
-    /// Rename direct children to "PascalCase" style, as typically used for
-    /// enum variants.
-    PascalCase,
-    /// Rename direct children to "camelCase" style.
-    CamelCase,
-    /// Rename direct children to "snake_case" style, as commonly used for
-    /// fields.
-    SnakeCase,
-    /// Rename direct children to "SCREAMING_SNAKE_CASE" style, as commonly
-    /// used for constants.
-    ScreamingSnakeCase,
-    /// Rename direct children to "kebab-case" style.
-    KebabCase,
-    /// Rename direct children to "SCREAMING-KEBAB-CASE" style.
-    ScreamingKebabCase,
-}
-
-static RENAME_RULES: &[(&str, RenameRule)] = &[
-    ("lowercase", LowerCase),
-    ("UPPERCASE", UpperCase),
-    ("PascalCase", PascalCase),
-    ("camelCase", CamelCase),
-    ("snake_case", SnakeCase),
-    ("SCREAMING_SNAKE_CASE", ScreamingSnakeCase),
-    ("kebab-case", KebabCase),
-    ("SCREAMING-KEBAB-CASE", ScreamingKebabCase),
-];
-
-impl RenameRule {
-    pub fn from_str(rename_all_str: &str) -> Result<Self, ParseError> {
-        for (name, rule) in RENAME_RULES {
-            if rename_all_str == *name {
-                return Ok(*rule);
-            }
-        }
-        Err(ParseError {
-            unknown: rename_all_str,
-        })
-    }
-
-    /// Apply a renaming rule to an enum variant, returning the version expected in the source.
-    pub fn apply_to_variant(self, variant: &str) -> String {
-        match self {
-            None | PascalCase => variant.to_owned(),
-            LowerCase => variant.to_ascii_lowercase(),
-            UpperCase => variant.to_ascii_uppercase(),
-            CamelCase => variant[..1].to_ascii_lowercase() + &variant[1..],
-            SnakeCase => {
-                let mut snake = String::new();
-                for (i, ch) in variant.char_indices() {
-                    if i > 0 && ch.is_uppercase() {
-                        snake.push('_');
-                    }
-                    snake.push(ch.to_ascii_lowercase());
-                }
-                snake
-            }
-            ScreamingSnakeCase => SnakeCase.apply_to_variant(variant).to_ascii_uppercase(),
-            KebabCase => SnakeCase.apply_to_variant(variant).replace('_', "-"),
-            ScreamingKebabCase => ScreamingSnakeCase
-                .apply_to_variant(variant)
-                .replace('_', "-"),
-        }
-    }
-
-    /// Apply a renaming rule to a struct field, returning the version expected in the source.
-    pub fn apply_to_field(self, field: &str) -> String {
-        match self {
-            None | LowerCase | SnakeCase => field.to_owned(),
-            UpperCase => field.to_ascii_uppercase(),
-            PascalCase => {
-                let mut pascal = String::new();
-                let mut capitalize = true;
-                for ch in field.chars() {
-                    if ch == '_' {
-                        capitalize = true;
-                    } else if capitalize {
-                        pascal.push(ch.to_ascii_uppercase());
-                        capitalize = false;
-                    } else {
-                        pascal.push(ch);
-                    }
-                }
-                pascal
-            }
-            CamelCase => {
-                let pascal = PascalCase.apply_to_field(field);
-                pascal[..1].to_ascii_lowercase() + &pascal[1..]
-            }
-            ScreamingSnakeCase => field.to_ascii_uppercase(),
-            KebabCase => field.replace('_', "-"),
-            ScreamingKebabCase => ScreamingSnakeCase.apply_to_field(field).replace('_', "-"),
-        }
-    }
-
-    /// Returns the `RenameRule` if it is not `None`, `rule_b` otherwise.
-    pub fn or(self, rule_b: Self) -> Self {
-        match self {
-            None => rule_b,
-            _ => self,
-        }
-    }
-}
-
-pub struct ParseError<'a> {
-    unknown: &'a str,
-}
-
-impl<'a> Display for ParseError<'a> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str("unknown rename rule `rename_all = ")?;
-        Debug::fmt(self.unknown, f)?;
-        f.write_str("`, expected one of ")?;
-        for (i, (name, _rule)) in RENAME_RULES.iter().enumerate() {
-            if i > 0 {
-                f.write_str(", ")?;
-            }
-            Debug::fmt(name, f)?;
-        }
-        Ok(())
-    }
-}
-
-#[test]
-fn rename_variants() {
-    for &(original, lower, upper, camel, snake, screaming, kebab, screaming_kebab) in &[
-        (
-            "Outcome", "outcome", "OUTCOME", "outcome", "outcome", "OUTCOME", "outcome", "OUTCOME",
-        ),
-        (
-            "VeryTasty",
-            "verytasty",
-            "VERYTASTY",
-            "veryTasty",
-            "very_tasty",
-            "VERY_TASTY",
-            "very-tasty",
-            "VERY-TASTY",
-        ),
-        ("A", "a", "A", "a", "a", "A", "a", "A"),
-        ("Z42", "z42", "Z42", "z42", "z42", "Z42", "z42", "Z42"),
-    ] {
-        assert_eq!(None.apply_to_variant(original), original);
-        assert_eq!(LowerCase.apply_to_variant(original), lower);
-        assert_eq!(UpperCase.apply_to_variant(original), upper);
-        assert_eq!(PascalCase.apply_to_variant(original), original);
-        assert_eq!(CamelCase.apply_to_variant(original), camel);
-        assert_eq!(SnakeCase.apply_to_variant(original), snake);
-        assert_eq!(ScreamingSnakeCase.apply_to_variant(original), screaming);
-        assert_eq!(KebabCase.apply_to_variant(original), kebab);
-        assert_eq!(
-            ScreamingKebabCase.apply_to_variant(original),
-            screaming_kebab
-        );
-    }
-}
-
-#[test]
-fn rename_fields() {
-    for &(original, upper, pascal, camel, screaming, kebab, screaming_kebab) in &[
-        (
-            "outcome", "OUTCOME", "Outcome", "outcome", "OUTCOME", "outcome", "OUTCOME",
-        ),
-        (
-            "very_tasty",
-            "VERY_TASTY",
-            "VeryTasty",
-            "veryTasty",
-            "VERY_TASTY",
-            "very-tasty",
-            "VERY-TASTY",
-        ),
-        ("a", "A", "A", "a", "A", "a", "A"),
-        ("z42", "Z42", "Z42", "z42", "Z42", "z42", "Z42"),
-    ] {
-        assert_eq!(None.apply_to_field(original), original);
-        assert_eq!(UpperCase.apply_to_field(original), upper);
-        assert_eq!(PascalCase.apply_to_field(original), pascal);
-        assert_eq!(CamelCase.apply_to_field(original), camel);
-        assert_eq!(SnakeCase.apply_to_field(original), original);
-        assert_eq!(ScreamingSnakeCase.apply_to_field(original), screaming);
-        assert_eq!(KebabCase.apply_to_field(original), kebab);
-        assert_eq!(ScreamingKebabCase.apply_to_field(original), screaming_kebab);
-    }
-}
diff --git a/vendor/serde_derive/src/internals/check.rs b/vendor/serde_derive/src/internals/check.rs
deleted file mode 100644
index 52b0f37..0000000
--- a/vendor/serde_derive/src/internals/check.rs
+++ /dev/null
@@ -1,477 +0,0 @@
-use crate::internals::ast::{Container, Data, Field, Style};
-use crate::internals::attr::{Default, Identifier, TagType};
-use crate::internals::{ungroup, Ctxt, Derive};
-use syn::{Member, Type};
-
-// Cross-cutting checks that require looking at more than a single attrs object.
-// Simpler checks should happen when parsing and building the attrs.
-pub fn check(cx: &Ctxt, cont: &mut Container, derive: Derive) {
-    check_default_on_tuple(cx, cont);
-    check_remote_generic(cx, cont);
-    check_getter(cx, cont);
-    check_flatten(cx, cont);
-    check_identifier(cx, cont);
-    check_variant_skip_attrs(cx, cont);
-    check_internal_tag_field_name_conflict(cx, cont);
-    check_adjacent_tag_conflict(cx, cont);
-    check_transparent(cx, cont, derive);
-    check_from_and_try_from(cx, cont);
-}
-
-// If some field of a tuple struct is marked #[serde(default)] then all fields
-// after it must also be marked with that attribute, or the struct must have a
-// container-level serde(default) attribute. A field's default value is only
-// used for tuple fields if the sequence is exhausted at that point; that means
-// all subsequent fields will fail to deserialize if they don't have their own
-// default.
-fn check_default_on_tuple(cx: &Ctxt, cont: &Container) {
-    if let Default::None = cont.attrs.default() {
-        if let Data::Struct(Style::Tuple, fields) = &cont.data {
-            let mut first_default_index = None;
-            for (i, field) in fields.iter().enumerate() {
-                // Skipped fields automatically get the #[serde(default)]
-                // attribute. We are interested only on non-skipped fields here.
-                if field.attrs.skip_deserializing() {
-                    continue;
-                }
-                if let Default::None = field.attrs.default() {
-                    if let Some(first) = first_default_index {
-                        cx.error_spanned_by(
-                            field.ty,
-                            format!("field must have #[serde(default)] because previous field {} has #[serde(default)]", first),
-                        );
-                    }
-                    continue;
-                }
-                if first_default_index.is_none() {
-                    first_default_index = Some(i);
-                }
-            }
-        }
-    }
-}
-
-// Remote derive definition type must have either all of the generics of the
-// remote type:
-//
-//     #[serde(remote = "Generic")]
-//     struct Generic<T> {…}
-//
-// or none of them, i.e. defining impls for one concrete instantiation of the
-// remote type only:
-//
-//     #[serde(remote = "Generic<T>")]
-//     struct ConcreteDef {…}
-//
-fn check_remote_generic(cx: &Ctxt, cont: &Container) {
-    if let Some(remote) = cont.attrs.remote() {
-        let local_has_generic = !cont.generics.params.is_empty();
-        let remote_has_generic = !remote.segments.last().unwrap().arguments.is_none();
-        if local_has_generic && remote_has_generic {
-            cx.error_spanned_by(remote, "remove generic parameters from this path");
-        }
-    }
-}
-
-// Getters are only allowed inside structs (not enums) with the `remote`
-// attribute.
-fn check_getter(cx: &Ctxt, cont: &Container) {
-    match cont.data {
-        Data::Enum(_) => {
-            if cont.data.has_getter() {
-                cx.error_spanned_by(
-                    cont.original,
-                    "#[serde(getter = \"...\")] is not allowed in an enum",
-                );
-            }
-        }
-        Data::Struct(_, _) => {
-            if cont.data.has_getter() && cont.attrs.remote().is_none() {
-                cx.error_spanned_by(
-                    cont.original,
-                    "#[serde(getter = \"...\")] can only be used in structs that have #[serde(remote = \"...\")]",
-                );
-            }
-        }
-    }
-}
-
-// Flattening has some restrictions we can test.
-fn check_flatten(cx: &Ctxt, cont: &Container) {
-    match &cont.data {
-        Data::Enum(variants) => {
-            for variant in variants {
-                for field in &variant.fields {
-                    check_flatten_field(cx, variant.style, field);
-                }
-            }
-        }
-        Data::Struct(style, fields) => {
-            for field in fields {
-                check_flatten_field(cx, *style, field);
-            }
-        }
-    }
-}
-
-fn check_flatten_field(cx: &Ctxt, style: Style, field: &Field) {
-    if !field.attrs.flatten() {
-        return;
-    }
-    match style {
-        Style::Tuple => {
-            cx.error_spanned_by(
-                field.original,
-                "#[serde(flatten)] cannot be used on tuple structs",
-            );
-        }
-        Style::Newtype => {
-            cx.error_spanned_by(
-                field.original,
-                "#[serde(flatten)] cannot be used on newtype structs",
-            );
-        }
-        _ => {}
-    }
-}
-
-// The `other` attribute must be used at most once and it must be the last
-// variant of an enum.
-//
-// Inside a `variant_identifier` all variants must be unit variants. Inside a
-// `field_identifier` all but possibly one variant must be unit variants. The
-// last variant may be a newtype variant which is an implicit "other" case.
-fn check_identifier(cx: &Ctxt, cont: &Container) {
-    let variants = match &cont.data {
-        Data::Enum(variants) => variants,
-        Data::Struct(_, _) => return,
-    };
-
-    for (i, variant) in variants.iter().enumerate() {
-        match (
-            variant.style,
-            cont.attrs.identifier(),
-            variant.attrs.other(),
-            cont.attrs.tag(),
-        ) {
-            // The `other` attribute may not be used in a variant_identifier.
-            (_, Identifier::Variant, true, _) => {
-                cx.error_spanned_by(
-                    variant.original,
-                    "#[serde(other)] may not be used on a variant identifier",
-                );
-            }
-
-            // Variant with `other` attribute cannot appear in untagged enum
-            (_, Identifier::No, true, &TagType::None) => {
-                cx.error_spanned_by(
-                    variant.original,
-                    "#[serde(other)] cannot appear on untagged enum",
-                );
-            }
-
-            // Variant with `other` attribute must be the last one.
-            (Style::Unit, Identifier::Field, true, _) | (Style::Unit, Identifier::No, true, _) => {
-                if i < variants.len() - 1 {
-                    cx.error_spanned_by(
-                        variant.original,
-                        "#[serde(other)] must be on the last variant",
-                    );
-                }
-            }
-
-            // Variant with `other` attribute must be a unit variant.
-            (_, Identifier::Field, true, _) | (_, Identifier::No, true, _) => {
-                cx.error_spanned_by(
-                    variant.original,
-                    "#[serde(other)] must be on a unit variant",
-                );
-            }
-
-            // Any sort of variant is allowed if this is not an identifier.
-            (_, Identifier::No, false, _) => {}
-
-            // Unit variant without `other` attribute is always fine.
-            (Style::Unit, _, false, _) => {}
-
-            // The last field is allowed to be a newtype catch-all.
-            (Style::Newtype, Identifier::Field, false, _) => {
-                if i < variants.len() - 1 {
-                    cx.error_spanned_by(
-                        variant.original,
-                        format!("`{}` must be the last variant", variant.ident),
-                    );
-                }
-            }
-
-            (_, Identifier::Field, false, _) => {
-                cx.error_spanned_by(
-                    variant.original,
-                    "#[serde(field_identifier)] may only contain unit variants",
-                );
-            }
-
-            (_, Identifier::Variant, false, _) => {
-                cx.error_spanned_by(
-                    variant.original,
-                    "#[serde(variant_identifier)] may only contain unit variants",
-                );
-            }
-        }
-    }
-}
-
-// Skip-(de)serializing attributes are not allowed on variants marked
-// (de)serialize_with.
-fn check_variant_skip_attrs(cx: &Ctxt, cont: &Container) {
-    let variants = match &cont.data {
-        Data::Enum(variants) => variants,
-        Data::Struct(_, _) => return,
-    };
-
-    for variant in variants {
-        if variant.attrs.serialize_with().is_some() {
-            if variant.attrs.skip_serializing() {
-                cx.error_spanned_by(
-                    variant.original,
-                    format!(
-                        "variant `{}` cannot have both #[serde(serialize_with)] and #[serde(skip_serializing)]",
-                        variant.ident
-                    ),
-                );
-            }
-
-            for field in &variant.fields {
-                let member = member_message(&field.member);
-
-                if field.attrs.skip_serializing() {
-                    cx.error_spanned_by(
-                        variant.original,
-                        format!(
-                            "variant `{}` cannot have both #[serde(serialize_with)] and a field {} marked with #[serde(skip_serializing)]",
-                            variant.ident, member
-                        ),
-                    );
-                }
-
-                if field.attrs.skip_serializing_if().is_some() {
-                    cx.error_spanned_by(
-                        variant.original,
-                        format!(
-                            "variant `{}` cannot have both #[serde(serialize_with)] and a field {} marked with #[serde(skip_serializing_if)]",
-                            variant.ident, member
-                        ),
-                    );
-                }
-            }
-        }
-
-        if variant.attrs.deserialize_with().is_some() {
-            if variant.attrs.skip_deserializing() {
-                cx.error_spanned_by(
-                    variant.original,
-                    format!(
-                        "variant `{}` cannot have both #[serde(deserialize_with)] and #[serde(skip_deserializing)]",
-                        variant.ident
-                    ),
-                );
-            }
-
-            for field in &variant.fields {
-                if field.attrs.skip_deserializing() {
-                    let member = member_message(&field.member);
-
-                    cx.error_spanned_by(
-                        variant.original,
-                        format!(
-                            "variant `{}` cannot have both #[serde(deserialize_with)] and a field {} marked with #[serde(skip_deserializing)]",
-                            variant.ident, member
-                        ),
-                    );
-                }
-            }
-        }
-    }
-}
-
-// The tag of an internally-tagged struct variant must not be the same as either
-// one of its fields, as this would result in duplicate keys in the serialized
-// output and/or ambiguity in the to-be-deserialized input.
-fn check_internal_tag_field_name_conflict(cx: &Ctxt, cont: &Container) {
-    let variants = match &cont.data {
-        Data::Enum(variants) => variants,
-        Data::Struct(_, _) => return,
-    };
-
-    let tag = match cont.attrs.tag() {
-        TagType::Internal { tag } => tag.as_str(),
-        TagType::External | TagType::Adjacent { .. } | TagType::None => return,
-    };
-
-    let diagnose_conflict = || {
-        cx.error_spanned_by(
-            cont.original,
-            format!("variant field name `{}` conflicts with internal tag", tag),
-        );
-    };
-
-    for variant in variants {
-        match variant.style {
-            Style::Struct => {
-                if variant.attrs.untagged() {
-                    continue;
-                }
-                for field in &variant.fields {
-                    let check_ser =
-                        !(field.attrs.skip_serializing() || variant.attrs.skip_serializing());
-                    let check_de =
-                        !(field.attrs.skip_deserializing() || variant.attrs.skip_deserializing());
-                    let name = field.attrs.name();
-                    let ser_name = name.serialize_name();
-
-                    if check_ser && ser_name == tag {
-                        diagnose_conflict();
-                        return;
-                    }
-
-                    for de_name in field.attrs.aliases() {
-                        if check_de && de_name == tag {
-                            diagnose_conflict();
-                            return;
-                        }
-                    }
-                }
-            }
-            Style::Unit | Style::Newtype | Style::Tuple => {}
-        }
-    }
-}
-
-// In the case of adjacently-tagged enums, the type and the contents tag must
-// differ, for the same reason.
-fn check_adjacent_tag_conflict(cx: &Ctxt, cont: &Container) {
-    let (type_tag, content_tag) = match cont.attrs.tag() {
-        TagType::Adjacent { tag, content } => (tag, content),
-        TagType::Internal { .. } | TagType::External | TagType::None => return,
-    };
-
-    if type_tag == content_tag {
-        cx.error_spanned_by(
-            cont.original,
-            format!(
-                "enum tags `{}` for type and content conflict with each other",
-                type_tag
-            ),
-        );
-    }
-}
-
-// Enums and unit structs cannot be transparent.
-fn check_transparent(cx: &Ctxt, cont: &mut Container, derive: Derive) {
-    if !cont.attrs.transparent() {
-        return;
-    }
-
-    if cont.attrs.type_from().is_some() {
-        cx.error_spanned_by(
-            cont.original,
-            "#[serde(transparent)] is not allowed with #[serde(from = \"...\")]",
-        );
-    }
-
-    if cont.attrs.type_try_from().is_some() {
-        cx.error_spanned_by(
-            cont.original,
-            "#[serde(transparent)] is not allowed with #[serde(try_from = \"...\")]",
-        );
-    }
-
-    if cont.attrs.type_into().is_some() {
-        cx.error_spanned_by(
-            cont.original,
-            "#[serde(transparent)] is not allowed with #[serde(into = \"...\")]",
-        );
-    }
-
-    let fields = match &mut cont.data {
-        Data::Enum(_) => {
-            cx.error_spanned_by(
-                cont.original,
-                "#[serde(transparent)] is not allowed on an enum",
-            );
-            return;
-        }
-        Data::Struct(Style::Unit, _) => {
-            cx.error_spanned_by(
-                cont.original,
-                "#[serde(transparent)] is not allowed on a unit struct",
-            );
-            return;
-        }
-        Data::Struct(_, fields) => fields,
-    };
-
-    let mut transparent_field = None;
-
-    for field in fields {
-        if allow_transparent(field, derive) {
-            if transparent_field.is_some() {
-                cx.error_spanned_by(
-                    cont.original,
-                    "#[serde(transparent)] requires struct to have at most one transparent field",
-                );
-                return;
-            }
-            transparent_field = Some(field);
-        }
-    }
-
-    match transparent_field {
-        Some(transparent_field) => transparent_field.attrs.mark_transparent(),
-        None => match derive {
-            Derive::Serialize => {
-                cx.error_spanned_by(
-                    cont.original,
-                    "#[serde(transparent)] requires at least one field that is not skipped",
-                );
-            }
-            Derive::Deserialize => {
-                cx.error_spanned_by(
-                    cont.original,
-                    "#[serde(transparent)] requires at least one field that is neither skipped nor has a default",
-                );
-            }
-        },
-    }
-}
-
-fn member_message(member: &Member) -> String {
-    match member {
-        Member::Named(ident) => format!("`{}`", ident),
-        Member::Unnamed(i) => format!("#{}", i.index),
-    }
-}
-
-fn allow_transparent(field: &Field, derive: Derive) -> bool {
-    if let Type::Path(ty) = ungroup(field.ty) {
-        if let Some(seg) = ty.path.segments.last() {
-            if seg.ident == "PhantomData" {
-                return false;
-            }
-        }
-    }
-
-    match derive {
-        Derive::Serialize => !field.attrs.skip_serializing(),
-        Derive::Deserialize => !field.attrs.skip_deserializing() && field.attrs.default().is_none(),
-    }
-}
-
-fn check_from_and_try_from(cx: &Ctxt, cont: &mut Container) {
-    if cont.attrs.type_from().is_some() && cont.attrs.type_try_from().is_some() {
-        cx.error_spanned_by(
-            cont.original,
-            "#[serde(from = \"...\")] and #[serde(try_from = \"...\")] conflict with each other",
-        );
-    }
-}
diff --git a/vendor/serde_derive/src/internals/ctxt.rs b/vendor/serde_derive/src/internals/ctxt.rs
deleted file mode 100644
index a47bfa4..0000000
--- a/vendor/serde_derive/src/internals/ctxt.rs
+++ /dev/null
@@ -1,68 +0,0 @@
-use quote::ToTokens;
-use std::cell::RefCell;
-use std::fmt::Display;
-use std::thread;
-
-/// A type to collect errors together and format them.
-///
-/// Dropping this object will cause a panic. It must be consumed using `check`.
-///
-/// References can be shared since this type uses run-time exclusive mut checking.
-#[derive(Default)]
-pub struct Ctxt {
-    // The contents will be set to `None` during checking. This is so that checking can be
-    // enforced.
-    errors: RefCell<Option<Vec<syn::Error>>>,
-}
-
-impl Ctxt {
-    /// Create a new context object.
-    ///
-    /// This object contains no errors, but will still trigger a panic if it is not `check`ed.
-    pub fn new() -> Self {
-        Ctxt {
-            errors: RefCell::new(Some(Vec::new())),
-        }
-    }
-
-    /// Add an error to the context object with a tokenenizable object.
-    ///
-    /// The object is used for spanning in error messages.
-    pub fn error_spanned_by<A: ToTokens, T: Display>(&self, obj: A, msg: T) {
-        self.errors
-            .borrow_mut()
-            .as_mut()
-            .unwrap()
-            // Curb monomorphization from generating too many identical methods.
-            .push(syn::Error::new_spanned(obj.into_token_stream(), msg));
-    }
-
-    /// Add one of Syn's parse errors.
-    pub fn syn_error(&self, err: syn::Error) {
-        self.errors.borrow_mut().as_mut().unwrap().push(err);
-    }
-
-    /// Consume this object, producing a formatted error string if there are errors.
-    pub fn check(self) -> syn::Result<()> {
-        let mut errors = self.errors.borrow_mut().take().unwrap().into_iter();
-
-        let mut combined = match errors.next() {
-            Some(first) => first,
-            None => return Ok(()),
-        };
-
-        for rest in errors {
-            combined.combine(rest);
-        }
-
-        Err(combined)
-    }
-}
-
-impl Drop for Ctxt {
-    fn drop(&mut self) {
-        if !thread::panicking() && self.errors.borrow().is_some() {
-            panic!("forgot to check for errors");
-        }
-    }
-}
diff --git a/vendor/serde_derive/src/internals/mod.rs b/vendor/serde_derive/src/internals/mod.rs
deleted file mode 100644
index f98ef08..0000000
--- a/vendor/serde_derive/src/internals/mod.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-pub mod ast;
-pub mod attr;
-
-mod case;
-mod check;
-mod ctxt;
-mod receiver;
-mod respan;
-mod symbol;
-
-use syn::Type;
-
-pub use self::ctxt::Ctxt;
-pub use self::receiver::replace_receiver;
-
-#[derive(Copy, Clone)]
-pub enum Derive {
-    Serialize,
-    Deserialize,
-}
-
-pub fn ungroup(mut ty: &Type) -> &Type {
-    while let Type::Group(group) = ty {
-        ty = &group.elem;
-    }
-    ty
-}
diff --git a/vendor/serde_derive/src/internals/receiver.rs b/vendor/serde_derive/src/internals/receiver.rs
deleted file mode 100644
index fa2a77d..0000000
--- a/vendor/serde_derive/src/internals/receiver.rs
+++ /dev/null
@@ -1,292 +0,0 @@
-use crate::internals::respan::respan;
-use proc_macro2::Span;
-use quote::ToTokens;
-use std::mem;
-use syn::punctuated::Punctuated;
-use syn::{
-    parse_quote, Data, DeriveInput, Expr, ExprPath, GenericArgument, GenericParam, Generics, Macro,
-    Path, PathArguments, QSelf, ReturnType, Token, Type, TypeParamBound, TypePath, WherePredicate,
-};
-
-pub fn replace_receiver(input: &mut DeriveInput) {
-    let self_ty = {
-        let ident = &input.ident;
-        let ty_generics = input.generics.split_for_impl().1;
-        parse_quote!(#ident #ty_generics)
-    };
-    let mut visitor = ReplaceReceiver(&self_ty);
-    visitor.visit_generics_mut(&mut input.generics);
-    visitor.visit_data_mut(&mut input.data);
-}
-
-struct ReplaceReceiver<'a>(&'a TypePath);
-
-impl ReplaceReceiver<'_> {
-    fn self_ty(&self, span: Span) -> TypePath {
-        let tokens = self.0.to_token_stream();
-        let respanned = respan(tokens, span);
-        syn::parse2(respanned).unwrap()
-    }
-
-    fn self_to_qself(&self, qself: &mut Option<QSelf>, path: &mut Path) {
-        if path.leading_colon.is_some() || path.segments[0].ident != "Self" {
-            return;
-        }
-
-        if path.segments.len() == 1 {
-            self.self_to_expr_path(path);
-            return;
-        }
-
-        let span = path.segments[0].ident.span();
-        *qself = Some(QSelf {
-            lt_token: Token![<](span),
-            ty: Box::new(Type::Path(self.self_ty(span))),
-            position: 0,
-            as_token: None,
-            gt_token: Token![>](span),
-        });
-
-        path.leading_colon = Some(**path.segments.pairs().next().unwrap().punct().unwrap());
-
-        let segments = mem::replace(&mut path.segments, Punctuated::new());
-        path.segments = segments.into_pairs().skip(1).collect();
-    }
-
-    fn self_to_expr_path(&self, path: &mut Path) {
-        let self_ty = self.self_ty(path.segments[0].ident.span());
-        let variant = mem::replace(path, self_ty.path);
-        for segment in &mut path.segments {
-            if let PathArguments::AngleBracketed(bracketed) = &mut segment.arguments {
-                if bracketed.colon2_token.is_none() && !bracketed.args.is_empty() {
-                    bracketed.colon2_token = Some(<Token![::]>::default());
-                }
-            }
-        }
-        if variant.segments.len() > 1 {
-            path.segments.push_punct(<Token![::]>::default());
-            path.segments.extend(variant.segments.into_pairs().skip(1));
-        }
-    }
-}
-
-impl ReplaceReceiver<'_> {
-    // `Self` -> `Receiver`
-    fn visit_type_mut(&mut self, ty: &mut Type) {
-        let span = if let Type::Path(node) = ty {
-            if node.qself.is_none() && node.path.is_ident("Self") {
-                node.path.segments[0].ident.span()
-            } else {
-                self.visit_type_path_mut(node);
-                return;
-            }
-        } else {
-            self.visit_type_mut_impl(ty);
-            return;
-        };
-        *ty = self.self_ty(span).into();
-    }
-
-    // `Self::Assoc` -> `<Receiver>::Assoc`
-    fn visit_type_path_mut(&mut self, ty: &mut TypePath) {
-        if ty.qself.is_none() {
-            self.self_to_qself(&mut ty.qself, &mut ty.path);
-        }
-        self.visit_type_path_mut_impl(ty);
-    }
-
-    // `Self::method` -> `<Receiver>::method`
-    fn visit_expr_path_mut(&mut self, expr: &mut ExprPath) {
-        if expr.qself.is_none() {
-            self.self_to_qself(&mut expr.qself, &mut expr.path);
-        }
-        self.visit_expr_path_mut_impl(expr);
-    }
-
-    // Everything below is simply traversing the syntax tree.
-
-    fn visit_type_mut_impl(&mut self, ty: &mut Type) {
-        match ty {
-            #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
-            Type::Array(ty) => {
-                self.visit_type_mut(&mut ty.elem);
-                self.visit_expr_mut(&mut ty.len);
-            }
-            Type::BareFn(ty) => {
-                for arg in &mut ty.inputs {
-                    self.visit_type_mut(&mut arg.ty);
-                }
-                self.visit_return_type_mut(&mut ty.output);
-            }
-            Type::Group(ty) => self.visit_type_mut(&mut ty.elem),
-            Type::ImplTrait(ty) => {
-                for bound in &mut ty.bounds {
-                    self.visit_type_param_bound_mut(bound);
-                }
-            }
-            Type::Macro(ty) => self.visit_macro_mut(&mut ty.mac),
-            Type::Paren(ty) => self.visit_type_mut(&mut ty.elem),
-            Type::Path(ty) => {
-                if let Some(qself) = &mut ty.qself {
-                    self.visit_type_mut(&mut qself.ty);
-                }
-                self.visit_path_mut(&mut ty.path);
-            }
-            Type::Ptr(ty) => self.visit_type_mut(&mut ty.elem),
-            Type::Reference(ty) => self.visit_type_mut(&mut ty.elem),
-            Type::Slice(ty) => self.visit_type_mut(&mut ty.elem),
-            Type::TraitObject(ty) => {
-                for bound in &mut ty.bounds {
-                    self.visit_type_param_bound_mut(bound);
-                }
-            }
-            Type::Tuple(ty) => {
-                for elem in &mut ty.elems {
-                    self.visit_type_mut(elem);
-                }
-            }
-
-            Type::Infer(_) | Type::Never(_) | Type::Verbatim(_) => {}
-
-            _ => {}
-        }
-    }
-
-    fn visit_type_path_mut_impl(&mut self, ty: &mut TypePath) {
-        if let Some(qself) = &mut ty.qself {
-            self.visit_type_mut(&mut qself.ty);
-        }
-        self.visit_path_mut(&mut ty.path);
-    }
-
-    fn visit_expr_path_mut_impl(&mut self, expr: &mut ExprPath) {
-        if let Some(qself) = &mut expr.qself {
-            self.visit_type_mut(&mut qself.ty);
-        }
-        self.visit_path_mut(&mut expr.path);
-    }
-
-    fn visit_path_mut(&mut self, path: &mut Path) {
-        for segment in &mut path.segments {
-            self.visit_path_arguments_mut(&mut segment.arguments);
-        }
-    }
-
-    fn visit_path_arguments_mut(&mut self, arguments: &mut PathArguments) {
-        match arguments {
-            PathArguments::None => {}
-            PathArguments::AngleBracketed(arguments) => {
-                for arg in &mut arguments.args {
-                    match arg {
-                        #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
-                        GenericArgument::Type(arg) => self.visit_type_mut(arg),
-                        GenericArgument::AssocType(arg) => self.visit_type_mut(&mut arg.ty),
-                        GenericArgument::Lifetime(_)
-                        | GenericArgument::Const(_)
-                        | GenericArgument::AssocConst(_)
-                        | GenericArgument::Constraint(_) => {}
-                        _ => {}
-                    }
-                }
-            }
-            PathArguments::Parenthesized(arguments) => {
-                for argument in &mut arguments.inputs {
-                    self.visit_type_mut(argument);
-                }
-                self.visit_return_type_mut(&mut arguments.output);
-            }
-        }
-    }
-
-    fn visit_return_type_mut(&mut self, return_type: &mut ReturnType) {
-        match return_type {
-            ReturnType::Default => {}
-            ReturnType::Type(_, output) => self.visit_type_mut(output),
-        }
-    }
-
-    fn visit_type_param_bound_mut(&mut self, bound: &mut TypeParamBound) {
-        match bound {
-            #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
-            TypeParamBound::Trait(bound) => self.visit_path_mut(&mut bound.path),
-            TypeParamBound::Lifetime(_) | TypeParamBound::Verbatim(_) => {}
-            _ => {}
-        }
-    }
-
-    fn visit_generics_mut(&mut self, generics: &mut Generics) {
-        for param in &mut generics.params {
-            match param {
-                GenericParam::Type(param) => {
-                    for bound in &mut param.bounds {
-                        self.visit_type_param_bound_mut(bound);
-                    }
-                }
-                GenericParam::Lifetime(_) | GenericParam::Const(_) => {}
-            }
-        }
-        if let Some(where_clause) = &mut generics.where_clause {
-            for predicate in &mut where_clause.predicates {
-                match predicate {
-                    #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
-                    WherePredicate::Type(predicate) => {
-                        self.visit_type_mut(&mut predicate.bounded_ty);
-                        for bound in &mut predicate.bounds {
-                            self.visit_type_param_bound_mut(bound);
-                        }
-                    }
-                    WherePredicate::Lifetime(_) => {}
-                    _ => {}
-                }
-            }
-        }
-    }
-
-    fn visit_data_mut(&mut self, data: &mut Data) {
-        match data {
-            Data::Struct(data) => {
-                for field in &mut data.fields {
-                    self.visit_type_mut(&mut field.ty);
-                }
-            }
-            Data::Enum(data) => {
-                for variant in &mut data.variants {
-                    for field in &mut variant.fields {
-                        self.visit_type_mut(&mut field.ty);
-                    }
-                }
-            }
-            Data::Union(_) => {}
-        }
-    }
-
-    fn visit_expr_mut(&mut self, expr: &mut Expr) {
-        match expr {
-            Expr::Binary(expr) => {
-                self.visit_expr_mut(&mut expr.left);
-                self.visit_expr_mut(&mut expr.right);
-            }
-            Expr::Call(expr) => {
-                self.visit_expr_mut(&mut expr.func);
-                for arg in &mut expr.args {
-                    self.visit_expr_mut(arg);
-                }
-            }
-            Expr::Cast(expr) => {
-                self.visit_expr_mut(&mut expr.expr);
-                self.visit_type_mut(&mut expr.ty);
-            }
-            Expr::Field(expr) => self.visit_expr_mut(&mut expr.base),
-            Expr::Index(expr) => {
-                self.visit_expr_mut(&mut expr.expr);
-                self.visit_expr_mut(&mut expr.index);
-            }
-            Expr::Paren(expr) => self.visit_expr_mut(&mut expr.expr),
-            Expr::Path(expr) => self.visit_expr_path_mut(expr),
-            Expr::Unary(expr) => self.visit_expr_mut(&mut expr.expr),
-            _ => {}
-        }
-    }
-
-    fn visit_macro_mut(&mut self, _mac: &mut Macro) {}
-}
diff --git a/vendor/serde_derive/src/internals/respan.rs b/vendor/serde_derive/src/internals/respan.rs
deleted file mode 100644
index dcec701..0000000
--- a/vendor/serde_derive/src/internals/respan.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-use proc_macro2::{Group, Span, TokenStream, TokenTree};
-
-pub(crate) fn respan(stream: TokenStream, span: Span) -> TokenStream {
-    stream
-        .into_iter()
-        .map(|token| respan_token(token, span))
-        .collect()
-}
-
-fn respan_token(mut token: TokenTree, span: Span) -> TokenTree {
-    if let TokenTree::Group(g) = &mut token {
-        *g = Group::new(g.delimiter(), respan(g.stream(), span));
-    }
-    token.set_span(span);
-    token
-}
diff --git a/vendor/serde_derive/src/internals/symbol.rs b/vendor/serde_derive/src/internals/symbol.rs
deleted file mode 100644
index 572391a..0000000
--- a/vendor/serde_derive/src/internals/symbol.rs
+++ /dev/null
@@ -1,71 +0,0 @@
-use std::fmt::{self, Display};
-use syn::{Ident, Path};
-
-#[derive(Copy, Clone)]
-pub struct Symbol(&'static str);
-
-pub const ALIAS: Symbol = Symbol("alias");
-pub const BORROW: Symbol = Symbol("borrow");
-pub const BOUND: Symbol = Symbol("bound");
-pub const CONTENT: Symbol = Symbol("content");
-pub const CRATE: Symbol = Symbol("crate");
-pub const DEFAULT: Symbol = Symbol("default");
-pub const DENY_UNKNOWN_FIELDS: Symbol = Symbol("deny_unknown_fields");
-pub const DESERIALIZE: Symbol = Symbol("deserialize");
-pub const DESERIALIZE_WITH: Symbol = Symbol("deserialize_with");
-pub const EXPECTING: Symbol = Symbol("expecting");
-pub const FIELD_IDENTIFIER: Symbol = Symbol("field_identifier");
-pub const FLATTEN: Symbol = Symbol("flatten");
-pub const FROM: Symbol = Symbol("from");
-pub const GETTER: Symbol = Symbol("getter");
-pub const INTO: Symbol = Symbol("into");
-pub const NON_EXHAUSTIVE: Symbol = Symbol("non_exhaustive");
-pub const OTHER: Symbol = Symbol("other");
-pub const REMOTE: Symbol = Symbol("remote");
-pub const RENAME: Symbol = Symbol("rename");
-pub const RENAME_ALL: Symbol = Symbol("rename_all");
-pub const RENAME_ALL_FIELDS: Symbol = Symbol("rename_all_fields");
-pub const REPR: Symbol = Symbol("repr");
-pub const SERDE: Symbol = Symbol("serde");
-pub const SERIALIZE: Symbol = Symbol("serialize");
-pub const SERIALIZE_WITH: Symbol = Symbol("serialize_with");
-pub const SKIP: Symbol = Symbol("skip");
-pub const SKIP_DESERIALIZING: Symbol = Symbol("skip_deserializing");
-pub const SKIP_SERIALIZING: Symbol = Symbol("skip_serializing");
-pub const SKIP_SERIALIZING_IF: Symbol = Symbol("skip_serializing_if");
-pub const TAG: Symbol = Symbol("tag");
-pub const TRANSPARENT: Symbol = Symbol("transparent");
-pub const TRY_FROM: Symbol = Symbol("try_from");
-pub const UNTAGGED: Symbol = Symbol("untagged");
-pub const VARIANT_IDENTIFIER: Symbol = Symbol("variant_identifier");
-pub const WITH: Symbol = Symbol("with");
-
-impl PartialEq<Symbol> for Ident {
-    fn eq(&self, word: &Symbol) -> bool {
-        self == word.0
-    }
-}
-
-impl<'a> PartialEq<Symbol> for &'a Ident {
-    fn eq(&self, word: &Symbol) -> bool {
-        *self == word.0
-    }
-}
-
-impl PartialEq<Symbol> for Path {
-    fn eq(&self, word: &Symbol) -> bool {
-        self.is_ident(word.0)
-    }
-}
-
-impl<'a> PartialEq<Symbol> for &'a Path {
-    fn eq(&self, word: &Symbol) -> bool {
-        self.is_ident(word.0)
-    }
-}
-
-impl Display for Symbol {
-    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-        formatter.write_str(self.0)
-    }
-}
diff --git a/vendor/serde_derive/src/lib.rs b/vendor/serde_derive/src/lib.rs
deleted file mode 100644
index 8c4a6ca..0000000
--- a/vendor/serde_derive/src/lib.rs
+++ /dev/null
@@ -1,101 +0,0 @@
-//! This crate provides Serde's two derive macros.
-//!
-//! ```edition2021
-//! # use serde_derive::{Deserialize, Serialize};
-//! #
-//! #[derive(Serialize, Deserialize)]
-//! # struct S;
-//! #
-//! # fn main() {}
-//! ```
-//!
-//! Please refer to [https://serde.rs/derive.html] for how to set this up.
-//!
-//! [https://serde.rs/derive.html]: https://serde.rs/derive.html
-
-#![doc(html_root_url = "https://docs.rs/serde_derive/1.0.195")]
-// Ignored clippy lints
-#![allow(
-    // clippy false positive: https://github.com/rust-lang/rust-clippy/issues/7054
-    clippy::branches_sharing_code,
-    clippy::cognitive_complexity,
-    // clippy bug: https://github.com/rust-lang/rust-clippy/issues/7575
-    clippy::collapsible_match,
-    clippy::derive_partial_eq_without_eq,
-    clippy::enum_variant_names,
-    // clippy bug: https://github.com/rust-lang/rust-clippy/issues/6797
-    clippy::manual_map,
-    clippy::match_like_matches_macro,
-    clippy::needless_pass_by_value,
-    clippy::too_many_arguments,
-    clippy::trivially_copy_pass_by_ref,
-    clippy::used_underscore_binding,
-    clippy::wildcard_in_or_patterns,
-    // clippy bug: https://github.com/rust-lang/rust-clippy/issues/5704
-    clippy::unnested_or_patterns,
-)]
-// Ignored clippy_pedantic lints
-#![allow(
-    clippy::cast_possible_truncation,
-    clippy::checked_conversions,
-    clippy::doc_markdown,
-    clippy::enum_glob_use,
-    clippy::indexing_slicing,
-    clippy::items_after_statements,
-    clippy::let_underscore_untyped,
-    clippy::manual_assert,
-    clippy::map_err_ignore,
-    clippy::match_same_arms,
-    // clippy bug: https://github.com/rust-lang/rust-clippy/issues/6984
-    clippy::match_wildcard_for_single_variants,
-    clippy::module_name_repetitions,
-    clippy::must_use_candidate,
-    clippy::similar_names,
-    clippy::single_match_else,
-    clippy::struct_excessive_bools,
-    clippy::too_many_lines,
-    clippy::unseparated_literal_suffix,
-    clippy::unused_self,
-    clippy::use_self,
-    clippy::wildcard_imports
-)]
-#![cfg_attr(all(test, exhaustive), feature(non_exhaustive_omitted_patterns_lint))]
-
-extern crate proc_macro2;
-extern crate quote;
-extern crate syn;
-
-extern crate proc_macro;
-
-mod internals;
-
-use proc_macro::TokenStream;
-use syn::parse_macro_input;
-use syn::DeriveInput;
-
-#[macro_use]
-mod bound;
-#[macro_use]
-mod fragment;
-
-mod de;
-mod dummy;
-mod pretend;
-mod ser;
-mod this;
-
-#[proc_macro_derive(Serialize, attributes(serde))]
-pub fn derive_serialize(input: TokenStream) -> TokenStream {
-    let mut input = parse_macro_input!(input as DeriveInput);
-    ser::expand_derive_serialize(&mut input)
-        .unwrap_or_else(syn::Error::into_compile_error)
-        .into()
-}
-
-#[proc_macro_derive(Deserialize, attributes(serde))]
-pub fn derive_deserialize(input: TokenStream) -> TokenStream {
-    let mut input = parse_macro_input!(input as DeriveInput);
-    de::expand_derive_deserialize(&mut input)
-        .unwrap_or_else(syn::Error::into_compile_error)
-        .into()
-}
diff --git a/vendor/serde_derive/src/pretend.rs b/vendor/serde_derive/src/pretend.rs
deleted file mode 100644
index 2c9e779..0000000
--- a/vendor/serde_derive/src/pretend.rs
+++ /dev/null
@@ -1,185 +0,0 @@
-use crate::internals::ast::{Container, Data, Field, Style, Variant};
-use proc_macro2::TokenStream;
-use quote::{format_ident, quote};
-
-// Suppress dead_code warnings that would otherwise appear when using a remote
-// derive. Other than this pretend code, a struct annotated with remote derive
-// never has its fields referenced and an enum annotated with remote derive
-// never has its variants constructed.
-//
-//     warning: field is never used: `i`
-//      --> src/main.rs:4:20
-//       |
-//     4 | struct StructDef { i: i32 }
-//       |                    ^^^^^^
-//
-//     warning: variant is never constructed: `V`
-//      --> src/main.rs:8:16
-//       |
-//     8 | enum EnumDef { V }
-//       |                ^
-//
-pub fn pretend_used(cont: &Container, is_packed: bool) -> TokenStream {
-    let pretend_fields = pretend_fields_used(cont, is_packed);
-    let pretend_variants = pretend_variants_used(cont);
-
-    quote! {
-        #pretend_fields
-        #pretend_variants
-    }
-}
-
-// For structs with named fields, expands to:
-//
-//     match None::<&T> {
-//         Some(T { a: __v0, b: __v1 }) => {}
-//         _ => {}
-//     }
-//
-// For packed structs on sufficiently new rustc, expands to:
-//
-//     match None::<&T> {
-//         Some(__v @ T { a: _, b: _ }) => {
-//             let _ = addr_of!(__v.a);
-//             let _ = addr_of!(__v.b);
-//         }
-//         _ => {}
-//     }
-//
-// For packed structs on older rustc, we assume Sized and !Drop, and expand to:
-//
-//     match None::<T> {
-//         Some(T { a: __v0, b: __v1 }) => {}
-//         _ => {}
-//     }
-//
-// For enums, expands to the following but only including struct variants:
-//
-//     match None::<&T> {
-//         Some(T::A { a: __v0 }) => {}
-//         Some(T::B { b: __v0 }) => {}
-//         _ => {}
-//     }
-//
-fn pretend_fields_used(cont: &Container, is_packed: bool) -> TokenStream {
-    match &cont.data {
-        Data::Enum(variants) => pretend_fields_used_enum(cont, variants),
-        Data::Struct(Style::Struct | Style::Tuple | Style::Newtype, fields) => {
-            if is_packed {
-                pretend_fields_used_struct_packed(cont, fields)
-            } else {
-                pretend_fields_used_struct(cont, fields)
-            }
-        }
-        Data::Struct(Style::Unit, _) => quote!(),
-    }
-}
-
-fn pretend_fields_used_struct(cont: &Container, fields: &[Field]) -> TokenStream {
-    let type_ident = &cont.ident;
-    let (_, ty_generics, _) = cont.generics.split_for_impl();
-
-    let members = fields.iter().map(|field| &field.member);
-    let placeholders = (0usize..).map(|i| format_ident!("__v{}", i));
-
-    quote! {
-        match _serde::__private::None::<&#type_ident #ty_generics> {
-            _serde::__private::Some(#type_ident { #(#members: #placeholders),* }) => {}
-            _ => {}
-        }
-    }
-}
-
-fn pretend_fields_used_struct_packed(cont: &Container, fields: &[Field]) -> TokenStream {
-    let type_ident = &cont.ident;
-    let (_, ty_generics, _) = cont.generics.split_for_impl();
-
-    let members = fields.iter().map(|field| &field.member).collect::<Vec<_>>();
-
-    quote! {
-        match _serde::__private::None::<&#type_ident #ty_generics> {
-            _serde::__private::Some(__v @ #type_ident { #(#members: _),* }) => {
-                #(
-                    let _ = _serde::__private::ptr::addr_of!(__v.#members);
-                )*
-            }
-            _ => {}
-        }
-    }
-}
-
-fn pretend_fields_used_enum(cont: &Container, variants: &[Variant]) -> TokenStream {
-    let type_ident = &cont.ident;
-    let (_, ty_generics, _) = cont.generics.split_for_impl();
-
-    let patterns = variants
-        .iter()
-        .filter_map(|variant| match variant.style {
-            Style::Struct | Style::Tuple | Style::Newtype => {
-                let variant_ident = &variant.ident;
-                let members = variant.fields.iter().map(|field| &field.member);
-                let placeholders = (0usize..).map(|i| format_ident!("__v{}", i));
-                Some(quote!(#type_ident::#variant_ident { #(#members: #placeholders),* }))
-            }
-            Style::Unit => None,
-        })
-        .collect::<Vec<_>>();
-
-    quote! {
-        match _serde::__private::None::<&#type_ident #ty_generics> {
-            #(
-                _serde::__private::Some(#patterns) => {}
-            )*
-            _ => {}
-        }
-    }
-}
-
-// Expands to one of these per enum variant:
-//
-//     match None {
-//         Some((__v0, __v1,)) => {
-//             let _ = E::V { a: __v0, b: __v1 };
-//         }
-//         _ => {}
-//     }
-//
-fn pretend_variants_used(cont: &Container) -> TokenStream {
-    let variants = match &cont.data {
-        Data::Enum(variants) => variants,
-        Data::Struct(_, _) => {
-            return quote!();
-        }
-    };
-
-    let type_ident = &cont.ident;
-    let (_, ty_generics, _) = cont.generics.split_for_impl();
-    let turbofish = ty_generics.as_turbofish();
-
-    let cases = variants.iter().map(|variant| {
-        let variant_ident = &variant.ident;
-        let placeholders = &(0..variant.fields.len())
-            .map(|i| format_ident!("__v{}", i))
-            .collect::<Vec<_>>();
-
-        let pat = match variant.style {
-            Style::Struct => {
-                let members = variant.fields.iter().map(|field| &field.member);
-                quote!({ #(#members: #placeholders),* })
-            }
-            Style::Tuple | Style::Newtype => quote!(( #(#placeholders),* )),
-            Style::Unit => quote!(),
-        };
-
-        quote! {
-            match _serde::__private::None {
-                _serde::__private::Some((#(#placeholders,)*)) => {
-                    let _ = #type_ident::#variant_ident #turbofish #pat;
-                }
-                _ => {}
-            }
-        }
-    });
-
-    quote!(#(#cases)*)
-}
diff --git a/vendor/serde_derive/src/ser.rs b/vendor/serde_derive/src/ser.rs
deleted file mode 100644
index 3be51ee..0000000
--- a/vendor/serde_derive/src/ser.rs
+++ /dev/null
@@ -1,1359 +0,0 @@
-use crate::fragment::{Fragment, Match, Stmts};
-use crate::internals::ast::{Container, Data, Field, Style, Variant};
-use crate::internals::{attr, replace_receiver, Ctxt, Derive};
-use crate::{bound, dummy, pretend, this};
-use proc_macro2::{Span, TokenStream};
-use quote::{quote, quote_spanned};
-use syn::spanned::Spanned;
-use syn::{parse_quote, Ident, Index, Member};
-
-pub fn expand_derive_serialize(input: &mut syn::DeriveInput) -> syn::Result<TokenStream> {
-    replace_receiver(input);
-
-    let ctxt = Ctxt::new();
-    let cont = match Container::from_ast(&ctxt, input, Derive::Serialize) {
-        Some(cont) => cont,
-        None => return Err(ctxt.check().unwrap_err()),
-    };
-    precondition(&ctxt, &cont);
-    ctxt.check()?;
-
-    let ident = &cont.ident;
-    let params = Parameters::new(&cont);
-    let (impl_generics, ty_generics, where_clause) = params.generics.split_for_impl();
-    let body = Stmts(serialize_body(&cont, &params));
-    let serde = cont.attrs.serde_path();
-
-    let impl_block = if let Some(remote) = cont.attrs.remote() {
-        let vis = &input.vis;
-        let used = pretend::pretend_used(&cont, params.is_packed);
-        quote! {
-            impl #impl_generics #ident #ty_generics #where_clause {
-                #vis fn serialize<__S>(__self: &#remote #ty_generics, __serializer: __S) -> #serde::__private::Result<__S::Ok, __S::Error>
-                where
-                    __S: #serde::Serializer,
-                {
-                    #used
-                    #body
-                }
-            }
-        }
-    } else {
-        quote! {
-            #[automatically_derived]
-            impl #impl_generics #serde::Serialize for #ident #ty_generics #where_clause {
-                fn serialize<__S>(&self, __serializer: __S) -> #serde::__private::Result<__S::Ok, __S::Error>
-                where
-                    __S: #serde::Serializer,
-                {
-                    #body
-                }
-            }
-        }
-    };
-
-    Ok(dummy::wrap_in_const(
-        cont.attrs.custom_serde_path(),
-        impl_block,
-    ))
-}
-
-fn precondition(cx: &Ctxt, cont: &Container) {
-    match cont.attrs.identifier() {
-        attr::Identifier::No => {}
-        attr::Identifier::Field => {
-            cx.error_spanned_by(cont.original, "field identifiers cannot be serialized");
-        }
-        attr::Identifier::Variant => {
-            cx.error_spanned_by(cont.original, "variant identifiers cannot be serialized");
-        }
-    }
-}
-
-struct Parameters {
-    /// Variable holding the value being serialized. Either `self` for local
-    /// types or `__self` for remote types.
-    self_var: Ident,
-
-    /// Path to the type the impl is for. Either a single `Ident` for local
-    /// types (does not include generic parameters) or `some::remote::Path` for
-    /// remote types.
-    this_type: syn::Path,
-
-    /// Same as `this_type` but using `::<T>` for generic parameters for use in
-    /// expression position.
-    this_value: syn::Path,
-
-    /// Generics including any explicit and inferred bounds for the impl.
-    generics: syn::Generics,
-
-    /// Type has a `serde(remote = "...")` attribute.
-    is_remote: bool,
-
-    /// Type has a repr(packed) attribute.
-    is_packed: bool,
-}
-
-impl Parameters {
-    fn new(cont: &Container) -> Self {
-        let is_remote = cont.attrs.remote().is_some();
-        let self_var = if is_remote {
-            Ident::new("__self", Span::call_site())
-        } else {
-            Ident::new("self", Span::call_site())
-        };
-
-        let this_type = this::this_type(cont);
-        let this_value = this::this_value(cont);
-        let is_packed = cont.attrs.is_packed();
-        let generics = build_generics(cont);
-
-        Parameters {
-            self_var,
-            this_type,
-            this_value,
-            generics,
-            is_remote,
-            is_packed,
-        }
-    }
-
-    /// Type name to use in error messages and `&'static str` arguments to
-    /// various Serializer methods.
-    fn type_name(&self) -> String {
-        self.this_type.segments.last().unwrap().ident.to_string()
-    }
-}
-
-// All the generics in the input, plus a bound `T: Serialize` for each generic
-// field type that will be serialized by us.
-fn build_generics(cont: &Container) -> syn::Generics {
-    let generics = bound::without_defaults(cont.generics);
-
-    let generics =
-        bound::with_where_predicates_from_fields(cont, &generics, attr::Field::ser_bound);
-
-    let generics =
-        bound::with_where_predicates_from_variants(cont, &generics, attr::Variant::ser_bound);
-
-    match cont.attrs.ser_bound() {
-        Some(predicates) => bound::with_where_predicates(&generics, predicates),
-        None => bound::with_bound(
-            cont,
-            &generics,
-            needs_serialize_bound,
-            &parse_quote!(_serde::Serialize),
-        ),
-    }
-}
-
-// Fields with a `skip_serializing` or `serialize_with` attribute, or which
-// belong to a variant with a 'skip_serializing` or `serialize_with` attribute,
-// are not serialized by us so we do not generate a bound. Fields with a `bound`
-// attribute specify their own bound so we do not generate one. All other fields
-// may need a `T: Serialize` bound where T is the type of the field.
-fn needs_serialize_bound(field: &attr::Field, variant: Option<&attr::Variant>) -> bool {
-    !field.skip_serializing()
-        && field.serialize_with().is_none()
-        && field.ser_bound().is_none()
-        && variant.map_or(true, |variant| {
-            !variant.skip_serializing()
-                && variant.serialize_with().is_none()
-                && variant.ser_bound().is_none()
-        })
-}
-
-fn serialize_body(cont: &Container, params: &Parameters) -> Fragment {
-    if cont.attrs.transparent() {
-        serialize_transparent(cont, params)
-    } else if let Some(type_into) = cont.attrs.type_into() {
-        serialize_into(params, type_into)
-    } else {
-        match &cont.data {
-            Data::Enum(variants) => serialize_enum(params, variants, &cont.attrs),
-            Data::Struct(Style::Struct, fields) => serialize_struct(params, fields, &cont.attrs),
-            Data::Struct(Style::Tuple, fields) => {
-                serialize_tuple_struct(params, fields, &cont.attrs)
-            }
-            Data::Struct(Style::Newtype, fields) => {
-                serialize_newtype_struct(params, &fields[0], &cont.attrs)
-            }
-            Data::Struct(Style::Unit, _) => serialize_unit_struct(&cont.attrs),
-        }
-    }
-}
-
-fn serialize_transparent(cont: &Container, params: &Parameters) -> Fragment {
-    let fields = match &cont.data {
-        Data::Struct(_, fields) => fields,
-        Data::Enum(_) => unreachable!(),
-    };
-
-    let self_var = &params.self_var;
-    let transparent_field = fields.iter().find(|f| f.attrs.transparent()).unwrap();
-    let member = &transparent_field.member;
-
-    let path = match transparent_field.attrs.serialize_with() {
-        Some(path) => quote!(#path),
-        None => {
-            let span = transparent_field.original.span();
-            quote_spanned!(span=> _serde::Serialize::serialize)
-        }
-    };
-
-    quote_block! {
-        #path(&#self_var.#member, __serializer)
-    }
-}
-
-fn serialize_into(params: &Parameters, type_into: &syn::Type) -> Fragment {
-    let self_var = &params.self_var;
-    quote_block! {
-        _serde::Serialize::serialize(
-            &_serde::__private::Into::<#type_into>::into(_serde::__private::Clone::clone(#self_var)),
-            __serializer)
-    }
-}
-
-fn serialize_unit_struct(cattrs: &attr::Container) -> Fragment {
-    let type_name = cattrs.name().serialize_name();
-
-    quote_expr! {
-        _serde::Serializer::serialize_unit_struct(__serializer, #type_name)
-    }
-}
-
-fn serialize_newtype_struct(
-    params: &Parameters,
-    field: &Field,
-    cattrs: &attr::Container,
-) -> Fragment {
-    let type_name = cattrs.name().serialize_name();
-
-    let mut field_expr = get_member(
-        params,
-        field,
-        &Member::Unnamed(Index {
-            index: 0,
-            span: Span::call_site(),
-        }),
-    );
-    if let Some(path) = field.attrs.serialize_with() {
-        field_expr = wrap_serialize_field_with(params, field.ty, path, &field_expr);
-    }
-
-    let span = field.original.span();
-    let func = quote_spanned!(span=> _serde::Serializer::serialize_newtype_struct);
-    quote_expr! {
-        #func(__serializer, #type_name, #field_expr)
-    }
-}
-
-fn serialize_tuple_struct(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-) -> Fragment {
-    let serialize_stmts =
-        serialize_tuple_struct_visitor(fields, params, false, &TupleTrait::SerializeTupleStruct);
-
-    let type_name = cattrs.name().serialize_name();
-
-    let mut serialized_fields = fields
-        .iter()
-        .enumerate()
-        .filter(|(_, field)| !field.attrs.skip_serializing())
-        .peekable();
-
-    let let_mut = mut_if(serialized_fields.peek().is_some());
-
-    let len = serialized_fields
-        .map(|(i, field)| match field.attrs.skip_serializing_if() {
-            None => quote!(1),
-            Some(path) => {
-                let index = syn::Index {
-                    index: i as u32,
-                    span: Span::call_site(),
-                };
-                let field_expr = get_member(params, field, &Member::Unnamed(index));
-                quote!(if #path(#field_expr) { 0 } else { 1 })
-            }
-        })
-        .fold(quote!(0), |sum, expr| quote!(#sum + #expr));
-
-    quote_block! {
-        let #let_mut __serde_state = _serde::Serializer::serialize_tuple_struct(__serializer, #type_name, #len)?;
-        #(#serialize_stmts)*
-        _serde::ser::SerializeTupleStruct::end(__serde_state)
-    }
-}
-
-fn serialize_struct(params: &Parameters, fields: &[Field], cattrs: &attr::Container) -> Fragment {
-    assert!(fields.len() as u64 <= u64::from(u32::max_value()));
-
-    if cattrs.has_flatten() {
-        serialize_struct_as_map(params, fields, cattrs)
-    } else {
-        serialize_struct_as_struct(params, fields, cattrs)
-    }
-}
-
-fn serialize_struct_tag_field(cattrs: &attr::Container, struct_trait: &StructTrait) -> TokenStream {
-    match cattrs.tag() {
-        attr::TagType::Internal { tag } => {
-            let type_name = cattrs.name().serialize_name();
-            let func = struct_trait.serialize_field(Span::call_site());
-            quote! {
-                #func(&mut __serde_state, #tag, #type_name)?;
-            }
-        }
-        _ => quote! {},
-    }
-}
-
-fn serialize_struct_as_struct(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-) -> Fragment {
-    let serialize_fields =
-        serialize_struct_visitor(fields, params, false, &StructTrait::SerializeStruct);
-
-    let type_name = cattrs.name().serialize_name();
-
-    let tag_field = serialize_struct_tag_field(cattrs, &StructTrait::SerializeStruct);
-    let tag_field_exists = !tag_field.is_empty();
-
-    let mut serialized_fields = fields
-        .iter()
-        .filter(|&field| !field.attrs.skip_serializing())
-        .peekable();
-
-    let let_mut = mut_if(serialized_fields.peek().is_some() || tag_field_exists);
-
-    let len = serialized_fields
-        .map(|field| match field.attrs.skip_serializing_if() {
-            None => quote!(1),
-            Some(path) => {
-                let field_expr = get_member(params, field, &field.member);
-                quote!(if #path(#field_expr) { 0 } else { 1 })
-            }
-        })
-        .fold(
-            quote!(#tag_field_exists as usize),
-            |sum, expr| quote!(#sum + #expr),
-        );
-
-    quote_block! {
-        let #let_mut __serde_state = _serde::Serializer::serialize_struct(__serializer, #type_name, #len)?;
-        #tag_field
-        #(#serialize_fields)*
-        _serde::ser::SerializeStruct::end(__serde_state)
-    }
-}
-
-fn serialize_struct_as_map(
-    params: &Parameters,
-    fields: &[Field],
-    cattrs: &attr::Container,
-) -> Fragment {
-    let serialize_fields =
-        serialize_struct_visitor(fields, params, false, &StructTrait::SerializeMap);
-
-    let tag_field = serialize_struct_tag_field(cattrs, &StructTrait::SerializeMap);
-    let tag_field_exists = !tag_field.is_empty();
-
-    let mut serialized_fields = fields
-        .iter()
-        .filter(|&field| !field.attrs.skip_serializing())
-        .peekable();
-
-    let let_mut = mut_if(serialized_fields.peek().is_some() || tag_field_exists);
-
-    let len = if cattrs.has_flatten() {
-        quote!(_serde::__private::None)
-    } else {
-        let len = serialized_fields
-            .map(|field| match field.attrs.skip_serializing_if() {
-                None => quote!(1),
-                Some(path) => {
-                    let field_expr = get_member(params, field, &field.member);
-                    quote!(if #path(#field_expr) { 0 } else { 1 })
-                }
-            })
-            .fold(
-                quote!(#tag_field_exists as usize),
-                |sum, expr| quote!(#sum + #expr),
-            );
-        quote!(_serde::__private::Some(#len))
-    };
-
-    quote_block! {
-        let #let_mut __serde_state = _serde::Serializer::serialize_map(__serializer, #len)?;
-        #tag_field
-        #(#serialize_fields)*
-        _serde::ser::SerializeMap::end(__serde_state)
-    }
-}
-
-fn serialize_enum(params: &Parameters, variants: &[Variant], cattrs: &attr::Container) -> Fragment {
-    assert!(variants.len() as u64 <= u64::from(u32::max_value()));
-
-    let self_var = &params.self_var;
-
-    let mut arms: Vec<_> = variants
-        .iter()
-        .enumerate()
-        .map(|(variant_index, variant)| {
-            serialize_variant(params, variant, variant_index as u32, cattrs)
-        })
-        .collect();
-
-    if cattrs.remote().is_some() && cattrs.non_exhaustive() {
-        arms.push(quote! {
-            ref unrecognized => _serde::__private::Err(_serde::ser::Error::custom(_serde::__private::ser::CannotSerializeVariant(unrecognized))),
-        });
-    }
-
-    quote_expr! {
-        match *#self_var {
-            #(#arms)*
-        }
-    }
-}
-
-fn serialize_variant(
-    params: &Parameters,
-    variant: &Variant,
-    variant_index: u32,
-    cattrs: &attr::Container,
-) -> TokenStream {
-    let this_value = &params.this_value;
-    let variant_ident = &variant.ident;
-
-    if variant.attrs.skip_serializing() {
-        let skipped_msg = format!(
-            "the enum variant {}::{} cannot be serialized",
-            params.type_name(),
-            variant_ident
-        );
-        let skipped_err = quote! {
-            _serde::__private::Err(_serde::ser::Error::custom(#skipped_msg))
-        };
-        let fields_pat = match variant.style {
-            Style::Unit => quote!(),
-            Style::Newtype | Style::Tuple => quote!((..)),
-            Style::Struct => quote!({ .. }),
-        };
-        quote! {
-            #this_value::#variant_ident #fields_pat => #skipped_err,
-        }
-    } else {
-        // variant wasn't skipped
-        let case = match variant.style {
-            Style::Unit => {
-                quote! {
-                    #this_value::#variant_ident
-                }
-            }
-            Style::Newtype => {
-                quote! {
-                    #this_value::#variant_ident(ref __field0)
-                }
-            }
-            Style::Tuple => {
-                let field_names = (0..variant.fields.len())
-                    .map(|i| Ident::new(&format!("__field{}", i), Span::call_site()));
-                quote! {
-                    #this_value::#variant_ident(#(ref #field_names),*)
-                }
-            }
-            Style::Struct => {
-                let members = variant.fields.iter().map(|f| &f.member);
-                quote! {
-                    #this_value::#variant_ident { #(ref #members),* }
-                }
-            }
-        };
-
-        let body = Match(match (cattrs.tag(), variant.attrs.untagged()) {
-            (attr::TagType::External, false) => {
-                serialize_externally_tagged_variant(params, variant, variant_index, cattrs)
-            }
-            (attr::TagType::Internal { tag }, false) => {
-                serialize_internally_tagged_variant(params, variant, cattrs, tag)
-            }
-            (attr::TagType::Adjacent { tag, content }, false) => {
-                serialize_adjacently_tagged_variant(
-                    params,
-                    variant,
-                    cattrs,
-                    variant_index,
-                    tag,
-                    content,
-                )
-            }
-            (attr::TagType::None, _) | (_, true) => {
-                serialize_untagged_variant(params, variant, cattrs)
-            }
-        });
-
-        quote! {
-            #case => #body
-        }
-    }
-}
-
-fn serialize_externally_tagged_variant(
-    params: &Parameters,
-    variant: &Variant,
-    variant_index: u32,
-    cattrs: &attr::Container,
-) -> Fragment {
-    let type_name = cattrs.name().serialize_name();
-    let variant_name = variant.attrs.name().serialize_name();
-
-    if let Some(path) = variant.attrs.serialize_with() {
-        let ser = wrap_serialize_variant_with(params, path, variant);
-        return quote_expr! {
-            _serde::Serializer::serialize_newtype_variant(
-                __serializer,
-                #type_name,
-                #variant_index,
-                #variant_name,
-                #ser,
-            )
-        };
-    }
-
-    match effective_style(variant) {
-        Style::Unit => {
-            quote_expr! {
-                _serde::Serializer::serialize_unit_variant(
-                    __serializer,
-                    #type_name,
-                    #variant_index,
-                    #variant_name,
-                )
-            }
-        }
-        Style::Newtype => {
-            let field = &variant.fields[0];
-            let mut field_expr = quote!(__field0);
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_field_with(params, field.ty, path, &field_expr);
-            }
-
-            let span = field.original.span();
-            let func = quote_spanned!(span=> _serde::Serializer::serialize_newtype_variant);
-            quote_expr! {
-                #func(
-                    __serializer,
-                    #type_name,
-                    #variant_index,
-                    #variant_name,
-                    #field_expr,
-                )
-            }
-        }
-        Style::Tuple => serialize_tuple_variant(
-            TupleVariant::ExternallyTagged {
-                type_name,
-                variant_index,
-                variant_name,
-            },
-            params,
-            &variant.fields,
-        ),
-        Style::Struct => serialize_struct_variant(
-            StructVariant::ExternallyTagged {
-                variant_index,
-                variant_name,
-            },
-            params,
-            &variant.fields,
-            type_name,
-        ),
-    }
-}
-
-fn serialize_internally_tagged_variant(
-    params: &Parameters,
-    variant: &Variant,
-    cattrs: &attr::Container,
-    tag: &str,
-) -> Fragment {
-    let type_name = cattrs.name().serialize_name();
-    let variant_name = variant.attrs.name().serialize_name();
-
-    let enum_ident_str = params.type_name();
-    let variant_ident_str = variant.ident.to_string();
-
-    if let Some(path) = variant.attrs.serialize_with() {
-        let ser = wrap_serialize_variant_with(params, path, variant);
-        return quote_expr! {
-            _serde::__private::ser::serialize_tagged_newtype(
-                __serializer,
-                #enum_ident_str,
-                #variant_ident_str,
-                #tag,
-                #variant_name,
-                #ser,
-            )
-        };
-    }
-
-    match effective_style(variant) {
-        Style::Unit => {
-            quote_block! {
-                let mut __struct = _serde::Serializer::serialize_struct(
-                    __serializer, #type_name, 1)?;
-                _serde::ser::SerializeStruct::serialize_field(
-                    &mut __struct, #tag, #variant_name)?;
-                _serde::ser::SerializeStruct::end(__struct)
-            }
-        }
-        Style::Newtype => {
-            let field = &variant.fields[0];
-            let mut field_expr = quote!(__field0);
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_field_with(params, field.ty, path, &field_expr);
-            }
-
-            let span = field.original.span();
-            let func = quote_spanned!(span=> _serde::__private::ser::serialize_tagged_newtype);
-            quote_expr! {
-                #func(
-                    __serializer,
-                    #enum_ident_str,
-                    #variant_ident_str,
-                    #tag,
-                    #variant_name,
-                    #field_expr,
-                )
-            }
-        }
-        Style::Struct => serialize_struct_variant(
-            StructVariant::InternallyTagged { tag, variant_name },
-            params,
-            &variant.fields,
-            type_name,
-        ),
-        Style::Tuple => unreachable!("checked in serde_derive_internals"),
-    }
-}
-
-fn serialize_adjacently_tagged_variant(
-    params: &Parameters,
-    variant: &Variant,
-    cattrs: &attr::Container,
-    variant_index: u32,
-    tag: &str,
-    content: &str,
-) -> Fragment {
-    let this_type = &params.this_type;
-    let type_name = cattrs.name().serialize_name();
-    let variant_name = variant.attrs.name().serialize_name();
-    let serialize_variant = quote! {
-        &_serde::__private::ser::AdjacentlyTaggedEnumVariant {
-            enum_name: #type_name,
-            variant_index: #variant_index,
-            variant_name: #variant_name,
-        }
-    };
-
-    let inner = Stmts(if let Some(path) = variant.attrs.serialize_with() {
-        let ser = wrap_serialize_variant_with(params, path, variant);
-        quote_expr! {
-            _serde::Serialize::serialize(#ser, __serializer)
-        }
-    } else {
-        match effective_style(variant) {
-            Style::Unit => {
-                return quote_block! {
-                    let mut __struct = _serde::Serializer::serialize_struct(
-                        __serializer, #type_name, 1)?;
-                    _serde::ser::SerializeStruct::serialize_field(
-                        &mut __struct, #tag, #serialize_variant)?;
-                    _serde::ser::SerializeStruct::end(__struct)
-                };
-            }
-            Style::Newtype => {
-                let field = &variant.fields[0];
-                let mut field_expr = quote!(__field0);
-                if let Some(path) = field.attrs.serialize_with() {
-                    field_expr = wrap_serialize_field_with(params, field.ty, path, &field_expr);
-                }
-
-                let span = field.original.span();
-                let func = quote_spanned!(span=> _serde::ser::SerializeStruct::serialize_field);
-                return quote_block! {
-                    let mut __struct = _serde::Serializer::serialize_struct(
-                        __serializer, #type_name, 2)?;
-                    _serde::ser::SerializeStruct::serialize_field(
-                        &mut __struct, #tag, #serialize_variant)?;
-                    #func(
-                        &mut __struct, #content, #field_expr)?;
-                    _serde::ser::SerializeStruct::end(__struct)
-                };
-            }
-            Style::Tuple => {
-                serialize_tuple_variant(TupleVariant::Untagged, params, &variant.fields)
-            }
-            Style::Struct => serialize_struct_variant(
-                StructVariant::Untagged,
-                params,
-                &variant.fields,
-                variant_name,
-            ),
-        }
-    });
-
-    let fields_ty = variant.fields.iter().map(|f| &f.ty);
-    let fields_ident: &[_] = &match variant.style {
-        Style::Unit => {
-            if variant.attrs.serialize_with().is_some() {
-                vec![]
-            } else {
-                unreachable!()
-            }
-        }
-        Style::Newtype => vec![Member::Named(Ident::new("__field0", Span::call_site()))],
-        Style::Tuple => (0..variant.fields.len())
-            .map(|i| Member::Named(Ident::new(&format!("__field{}", i), Span::call_site())))
-            .collect(),
-        Style::Struct => variant.fields.iter().map(|f| f.member.clone()).collect(),
-    };
-
-    let (_, ty_generics, where_clause) = params.generics.split_for_impl();
-
-    let wrapper_generics = if fields_ident.is_empty() {
-        params.generics.clone()
-    } else {
-        bound::with_lifetime_bound(&params.generics, "'__a")
-    };
-    let (wrapper_impl_generics, wrapper_ty_generics, _) = wrapper_generics.split_for_impl();
-
-    quote_block! {
-        #[doc(hidden)]
-        struct __AdjacentlyTagged #wrapper_generics #where_clause {
-            data: (#(&'__a #fields_ty,)*),
-            phantom: _serde::__private::PhantomData<#this_type #ty_generics>,
-        }
-
-        impl #wrapper_impl_generics _serde::Serialize for __AdjacentlyTagged #wrapper_ty_generics #where_clause {
-            fn serialize<__S>(&self, __serializer: __S) -> _serde::__private::Result<__S::Ok, __S::Error>
-            where
-                __S: _serde::Serializer,
-            {
-                // Elements that have skip_serializing will be unused.
-                #[allow(unused_variables)]
-                let (#(#fields_ident,)*) = self.data;
-                #inner
-            }
-        }
-
-        let mut __struct = _serde::Serializer::serialize_struct(
-            __serializer, #type_name, 2)?;
-        _serde::ser::SerializeStruct::serialize_field(
-            &mut __struct, #tag, #serialize_variant)?;
-        _serde::ser::SerializeStruct::serialize_field(
-            &mut __struct, #content, &__AdjacentlyTagged {
-                data: (#(#fields_ident,)*),
-                phantom: _serde::__private::PhantomData::<#this_type #ty_generics>,
-            })?;
-        _serde::ser::SerializeStruct::end(__struct)
-    }
-}
-
-fn serialize_untagged_variant(
-    params: &Parameters,
-    variant: &Variant,
-    cattrs: &attr::Container,
-) -> Fragment {
-    if let Some(path) = variant.attrs.serialize_with() {
-        let ser = wrap_serialize_variant_with(params, path, variant);
-        return quote_expr! {
-            _serde::Serialize::serialize(#ser, __serializer)
-        };
-    }
-
-    match effective_style(variant) {
-        Style::Unit => {
-            quote_expr! {
-                _serde::Serializer::serialize_unit(__serializer)
-            }
-        }
-        Style::Newtype => {
-            let field = &variant.fields[0];
-            let mut field_expr = quote!(__field0);
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_field_with(params, field.ty, path, &field_expr);
-            }
-
-            let span = field.original.span();
-            let func = quote_spanned!(span=> _serde::Serialize::serialize);
-            quote_expr! {
-                #func(#field_expr, __serializer)
-            }
-        }
-        Style::Tuple => serialize_tuple_variant(TupleVariant::Untagged, params, &variant.fields),
-        Style::Struct => {
-            let type_name = cattrs.name().serialize_name();
-            serialize_struct_variant(StructVariant::Untagged, params, &variant.fields, type_name)
-        }
-    }
-}
-
-enum TupleVariant<'a> {
-    ExternallyTagged {
-        type_name: &'a str,
-        variant_index: u32,
-        variant_name: &'a str,
-    },
-    Untagged,
-}
-
-fn serialize_tuple_variant(
-    context: TupleVariant,
-    params: &Parameters,
-    fields: &[Field],
-) -> Fragment {
-    let tuple_trait = match context {
-        TupleVariant::ExternallyTagged { .. } => TupleTrait::SerializeTupleVariant,
-        TupleVariant::Untagged => TupleTrait::SerializeTuple,
-    };
-
-    let serialize_stmts = serialize_tuple_struct_visitor(fields, params, true, &tuple_trait);
-
-    let mut serialized_fields = fields
-        .iter()
-        .enumerate()
-        .filter(|(_, field)| !field.attrs.skip_serializing())
-        .peekable();
-
-    let let_mut = mut_if(serialized_fields.peek().is_some());
-
-    let len = serialized_fields
-        .map(|(i, field)| match field.attrs.skip_serializing_if() {
-            None => quote!(1),
-            Some(path) => {
-                let field_expr = Ident::new(&format!("__field{}", i), Span::call_site());
-                quote!(if #path(#field_expr) { 0 } else { 1 })
-            }
-        })
-        .fold(quote!(0), |sum, expr| quote!(#sum + #expr));
-
-    match context {
-        TupleVariant::ExternallyTagged {
-            type_name,
-            variant_index,
-            variant_name,
-        } => {
-            quote_block! {
-                let #let_mut __serde_state = _serde::Serializer::serialize_tuple_variant(
-                    __serializer,
-                    #type_name,
-                    #variant_index,
-                    #variant_name,
-                    #len)?;
-                #(#serialize_stmts)*
-                _serde::ser::SerializeTupleVariant::end(__serde_state)
-            }
-        }
-        TupleVariant::Untagged => {
-            quote_block! {
-                let #let_mut __serde_state = _serde::Serializer::serialize_tuple(
-                    __serializer,
-                    #len)?;
-                #(#serialize_stmts)*
-                _serde::ser::SerializeTuple::end(__serde_state)
-            }
-        }
-    }
-}
-
-enum StructVariant<'a> {
-    ExternallyTagged {
-        variant_index: u32,
-        variant_name: &'a str,
-    },
-    InternallyTagged {
-        tag: &'a str,
-        variant_name: &'a str,
-    },
-    Untagged,
-}
-
-fn serialize_struct_variant(
-    context: StructVariant,
-    params: &Parameters,
-    fields: &[Field],
-    name: &str,
-) -> Fragment {
-    if fields.iter().any(|field| field.attrs.flatten()) {
-        return serialize_struct_variant_with_flatten(context, params, fields, name);
-    }
-
-    let struct_trait = match context {
-        StructVariant::ExternallyTagged { .. } => StructTrait::SerializeStructVariant,
-        StructVariant::InternallyTagged { .. } | StructVariant::Untagged => {
-            StructTrait::SerializeStruct
-        }
-    };
-
-    let serialize_fields = serialize_struct_visitor(fields, params, true, &struct_trait);
-
-    let mut serialized_fields = fields
-        .iter()
-        .filter(|&field| !field.attrs.skip_serializing())
-        .peekable();
-
-    let let_mut = mut_if(serialized_fields.peek().is_some());
-
-    let len = serialized_fields
-        .map(|field| {
-            let member = &field.member;
-
-            match field.attrs.skip_serializing_if() {
-                Some(path) => quote!(if #path(#member) { 0 } else { 1 }),
-                None => quote!(1),
-            }
-        })
-        .fold(quote!(0), |sum, expr| quote!(#sum + #expr));
-
-    match context {
-        StructVariant::ExternallyTagged {
-            variant_index,
-            variant_name,
-        } => {
-            quote_block! {
-                let #let_mut __serde_state = _serde::Serializer::serialize_struct_variant(
-                    __serializer,
-                    #name,
-                    #variant_index,
-                    #variant_name,
-                    #len,
-                )?;
-                #(#serialize_fields)*
-                _serde::ser::SerializeStructVariant::end(__serde_state)
-            }
-        }
-        StructVariant::InternallyTagged { tag, variant_name } => {
-            quote_block! {
-                let mut __serde_state = _serde::Serializer::serialize_struct(
-                    __serializer,
-                    #name,
-                    #len + 1,
-                )?;
-                _serde::ser::SerializeStruct::serialize_field(
-                    &mut __serde_state,
-                    #tag,
-                    #variant_name,
-                )?;
-                #(#serialize_fields)*
-                _serde::ser::SerializeStruct::end(__serde_state)
-            }
-        }
-        StructVariant::Untagged => {
-            quote_block! {
-                let #let_mut __serde_state = _serde::Serializer::serialize_struct(
-                    __serializer,
-                    #name,
-                    #len,
-                )?;
-                #(#serialize_fields)*
-                _serde::ser::SerializeStruct::end(__serde_state)
-            }
-        }
-    }
-}
-
-fn serialize_struct_variant_with_flatten(
-    context: StructVariant,
-    params: &Parameters,
-    fields: &[Field],
-    name: &str,
-) -> Fragment {
-    let struct_trait = StructTrait::SerializeMap;
-    let serialize_fields = serialize_struct_visitor(fields, params, true, &struct_trait);
-
-    let mut serialized_fields = fields
-        .iter()
-        .filter(|&field| !field.attrs.skip_serializing())
-        .peekable();
-
-    let let_mut = mut_if(serialized_fields.peek().is_some());
-
-    match context {
-        StructVariant::ExternallyTagged {
-            variant_index,
-            variant_name,
-        } => {
-            let this_type = &params.this_type;
-            let fields_ty = fields.iter().map(|f| &f.ty);
-            let members = &fields.iter().map(|f| &f.member).collect::<Vec<_>>();
-
-            let (_, ty_generics, where_clause) = params.generics.split_for_impl();
-            let wrapper_generics = bound::with_lifetime_bound(&params.generics, "'__a");
-            let (wrapper_impl_generics, wrapper_ty_generics, _) = wrapper_generics.split_for_impl();
-
-            quote_block! {
-                #[doc(hidden)]
-                struct __EnumFlatten #wrapper_generics #where_clause {
-                    data: (#(&'__a #fields_ty,)*),
-                    phantom: _serde::__private::PhantomData<#this_type #ty_generics>,
-                }
-
-                impl #wrapper_impl_generics _serde::Serialize for __EnumFlatten #wrapper_ty_generics #where_clause {
-                    fn serialize<__S>(&self, __serializer: __S) -> _serde::__private::Result<__S::Ok, __S::Error>
-                    where
-                        __S: _serde::Serializer,
-                    {
-                        let (#(#members,)*) = self.data;
-                        let #let_mut __serde_state = _serde::Serializer::serialize_map(
-                            __serializer,
-                            _serde::__private::None)?;
-                        #(#serialize_fields)*
-                        _serde::ser::SerializeMap::end(__serde_state)
-                    }
-                }
-
-                _serde::Serializer::serialize_newtype_variant(
-                    __serializer,
-                    #name,
-                    #variant_index,
-                    #variant_name,
-                    &__EnumFlatten {
-                        data: (#(#members,)*),
-                        phantom: _serde::__private::PhantomData::<#this_type #ty_generics>,
-                    })
-            }
-        }
-        StructVariant::InternallyTagged { tag, variant_name } => {
-            quote_block! {
-                let #let_mut __serde_state = _serde::Serializer::serialize_map(
-                    __serializer,
-                    _serde::__private::None)?;
-                _serde::ser::SerializeMap::serialize_entry(
-                    &mut __serde_state,
-                    #tag,
-                    #variant_name,
-                )?;
-                #(#serialize_fields)*
-                _serde::ser::SerializeMap::end(__serde_state)
-            }
-        }
-        StructVariant::Untagged => {
-            quote_block! {
-                let #let_mut __serde_state = _serde::Serializer::serialize_map(
-                    __serializer,
-                    _serde::__private::None)?;
-                #(#serialize_fields)*
-                _serde::ser::SerializeMap::end(__serde_state)
-            }
-        }
-    }
-}
-
-fn serialize_tuple_struct_visitor(
-    fields: &[Field],
-    params: &Parameters,
-    is_enum: bool,
-    tuple_trait: &TupleTrait,
-) -> Vec<TokenStream> {
-    fields
-        .iter()
-        .enumerate()
-        .filter(|(_, field)| !field.attrs.skip_serializing())
-        .map(|(i, field)| {
-            let mut field_expr = if is_enum {
-                let id = Ident::new(&format!("__field{}", i), Span::call_site());
-                quote!(#id)
-            } else {
-                get_member(
-                    params,
-                    field,
-                    &Member::Unnamed(Index {
-                        index: i as u32,
-                        span: Span::call_site(),
-                    }),
-                )
-            };
-
-            let skip = field
-                .attrs
-                .skip_serializing_if()
-                .map(|path| quote!(#path(#field_expr)));
-
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_field_with(params, field.ty, path, &field_expr);
-            }
-
-            let span = field.original.span();
-            let func = tuple_trait.serialize_element(span);
-            let ser = quote! {
-                #func(&mut __serde_state, #field_expr)?;
-            };
-
-            match skip {
-                None => ser,
-                Some(skip) => quote!(if !#skip { #ser }),
-            }
-        })
-        .collect()
-}
-
-fn serialize_struct_visitor(
-    fields: &[Field],
-    params: &Parameters,
-    is_enum: bool,
-    struct_trait: &StructTrait,
-) -> Vec<TokenStream> {
-    fields
-        .iter()
-        .filter(|&field| !field.attrs.skip_serializing())
-        .map(|field| {
-            let member = &field.member;
-
-            let mut field_expr = if is_enum {
-                quote!(#member)
-            } else {
-                get_member(params, field, member)
-            };
-
-            let key_expr = field.attrs.name().serialize_name();
-
-            let skip = field
-                .attrs
-                .skip_serializing_if()
-                .map(|path| quote!(#path(#field_expr)));
-
-            if let Some(path) = field.attrs.serialize_with() {
-                field_expr = wrap_serialize_field_with(params, field.ty, path, &field_expr);
-            }
-
-            let span = field.original.span();
-            let ser = if field.attrs.flatten() {
-                let func = quote_spanned!(span=> _serde::Serialize::serialize);
-                quote! {
-                    #func(&#field_expr, _serde::__private::ser::FlatMapSerializer(&mut __serde_state))?;
-                }
-            } else {
-                let func = struct_trait.serialize_field(span);
-                quote! {
-                    #func(&mut __serde_state, #key_expr, #field_expr)?;
-                }
-            };
-
-            match skip {
-                None => ser,
-                Some(skip) => {
-                    if let Some(skip_func) = struct_trait.skip_field(span) {
-                        quote! {
-                            if !#skip {
-                                #ser
-                            } else {
-                                #skip_func(&mut __serde_state, #key_expr)?;
-                            }
-                        }
-                    } else {
-                        quote! {
-                            if !#skip {
-                                #ser
-                            }
-                        }
-                    }
-                }
-            }
-        })
-        .collect()
-}
-
-fn wrap_serialize_field_with(
-    params: &Parameters,
-    field_ty: &syn::Type,
-    serialize_with: &syn::ExprPath,
-    field_expr: &TokenStream,
-) -> TokenStream {
-    wrap_serialize_with(params, serialize_with, &[field_ty], &[quote!(#field_expr)])
-}
-
-fn wrap_serialize_variant_with(
-    params: &Parameters,
-    serialize_with: &syn::ExprPath,
-    variant: &Variant,
-) -> TokenStream {
-    let field_tys: Vec<_> = variant.fields.iter().map(|field| field.ty).collect();
-    let field_exprs: Vec<_> = variant
-        .fields
-        .iter()
-        .map(|field| {
-            let id = match &field.member {
-                Member::Named(ident) => ident.clone(),
-                Member::Unnamed(member) => {
-                    Ident::new(&format!("__field{}", member.index), Span::call_site())
-                }
-            };
-            quote!(#id)
-        })
-        .collect();
-    wrap_serialize_with(
-        params,
-        serialize_with,
-        field_tys.as_slice(),
-        field_exprs.as_slice(),
-    )
-}
-
-fn wrap_serialize_with(
-    params: &Parameters,
-    serialize_with: &syn::ExprPath,
-    field_tys: &[&syn::Type],
-    field_exprs: &[TokenStream],
-) -> TokenStream {
-    let this_type = &params.this_type;
-    let (_, ty_generics, where_clause) = params.generics.split_for_impl();
-
-    let wrapper_generics = if field_exprs.is_empty() {
-        params.generics.clone()
-    } else {
-        bound::with_lifetime_bound(&params.generics, "'__a")
-    };
-    let (wrapper_impl_generics, wrapper_ty_generics, _) = wrapper_generics.split_for_impl();
-
-    let field_access = (0..field_exprs.len()).map(|n| {
-        Member::Unnamed(Index {
-            index: n as u32,
-            span: Span::call_site(),
-        })
-    });
-
-    quote!({
-        #[doc(hidden)]
-        struct __SerializeWith #wrapper_impl_generics #where_clause {
-            values: (#(&'__a #field_tys, )*),
-            phantom: _serde::__private::PhantomData<#this_type #ty_generics>,
-        }
-
-        impl #wrapper_impl_generics _serde::Serialize for __SerializeWith #wrapper_ty_generics #where_clause {
-            fn serialize<__S>(&self, __s: __S) -> _serde::__private::Result<__S::Ok, __S::Error>
-            where
-                __S: _serde::Serializer,
-            {
-                #serialize_with(#(self.values.#field_access, )* __s)
-            }
-        }
-
-        &__SerializeWith {
-            values: (#(#field_exprs, )*),
-            phantom: _serde::__private::PhantomData::<#this_type #ty_generics>,
-        }
-    })
-}
-
-// Serialization of an empty struct results in code like:
-//
-//     let mut __serde_state = serializer.serialize_struct("S", 0)?;
-//     _serde::ser::SerializeStruct::end(__serde_state)
-//
-// where we want to omit the `mut` to avoid a warning.
-fn mut_if(is_mut: bool) -> Option<TokenStream> {
-    if is_mut {
-        Some(quote!(mut))
-    } else {
-        None
-    }
-}
-
-fn get_member(params: &Parameters, field: &Field, member: &Member) -> TokenStream {
-    let self_var = &params.self_var;
-    match (params.is_remote, field.attrs.getter()) {
-        (false, None) => {
-            if params.is_packed {
-                quote!(&{#self_var.#member})
-            } else {
-                quote!(&#self_var.#member)
-            }
-        }
-        (true, None) => {
-            let inner = if params.is_packed {
-                quote!(&{#self_var.#member})
-            } else {
-                quote!(&#self_var.#member)
-            };
-            let ty = field.ty;
-            quote!(_serde::__private::ser::constrain::<#ty>(#inner))
-        }
-        (true, Some(getter)) => {
-            let ty = field.ty;
-            quote!(_serde::__private::ser::constrain::<#ty>(&#getter(#self_var)))
-        }
-        (false, Some(_)) => {
-            unreachable!("getter is only allowed for remote impls");
-        }
-    }
-}
-
-fn effective_style(variant: &Variant) -> Style {
-    match variant.style {
-        Style::Newtype if variant.fields[0].attrs.skip_serializing() => Style::Unit,
-        other => other,
-    }
-}
-
-enum StructTrait {
-    SerializeMap,
-    SerializeStruct,
-    SerializeStructVariant,
-}
-
-impl StructTrait {
-    fn serialize_field(&self, span: Span) -> TokenStream {
-        match *self {
-            StructTrait::SerializeMap => {
-                quote_spanned!(span=> _serde::ser::SerializeMap::serialize_entry)
-            }
-            StructTrait::SerializeStruct => {
-                quote_spanned!(span=> _serde::ser::SerializeStruct::serialize_field)
-            }
-            StructTrait::SerializeStructVariant => {
-                quote_spanned!(span=> _serde::ser::SerializeStructVariant::serialize_field)
-            }
-        }
-    }
-
-    fn skip_field(&self, span: Span) -> Option<TokenStream> {
-        match *self {
-            StructTrait::SerializeMap => None,
-            StructTrait::SerializeStruct => {
-                Some(quote_spanned!(span=> _serde::ser::SerializeStruct::skip_field))
-            }
-            StructTrait::SerializeStructVariant => {
-                Some(quote_spanned!(span=> _serde::ser::SerializeStructVariant::skip_field))
-            }
-        }
-    }
-}
-
-enum TupleTrait {
-    SerializeTuple,
-    SerializeTupleStruct,
-    SerializeTupleVariant,
-}
-
-impl TupleTrait {
-    fn serialize_element(&self, span: Span) -> TokenStream {
-        match *self {
-            TupleTrait::SerializeTuple => {
-                quote_spanned!(span=> _serde::ser::SerializeTuple::serialize_element)
-            }
-            TupleTrait::SerializeTupleStruct => {
-                quote_spanned!(span=> _serde::ser::SerializeTupleStruct::serialize_field)
-            }
-            TupleTrait::SerializeTupleVariant => {
-                quote_spanned!(span=> _serde::ser::SerializeTupleVariant::serialize_field)
-            }
-        }
-    }
-}
diff --git a/vendor/serde_derive/src/this.rs b/vendor/serde_derive/src/this.rs
deleted file mode 100644
index 941cea4..0000000
--- a/vendor/serde_derive/src/this.rs
+++ /dev/null
@@ -1,32 +0,0 @@
-use crate::internals::ast::Container;
-use syn::{Path, PathArguments, Token};
-
-pub fn this_type(cont: &Container) -> Path {
-    if let Some(remote) = cont.attrs.remote() {
-        let mut this = remote.clone();
-        for segment in &mut this.segments {
-            if let PathArguments::AngleBracketed(arguments) = &mut segment.arguments {
-                arguments.colon2_token = None;
-            }
-        }
-        this
-    } else {
-        Path::from(cont.ident.clone())
-    }
-}
-
-pub fn this_value(cont: &Container) -> Path {
-    if let Some(remote) = cont.attrs.remote() {
-        let mut this = remote.clone();
-        for segment in &mut this.segments {
-            if let PathArguments::AngleBracketed(arguments) = &mut segment.arguments {
-                if arguments.colon2_token.is_none() {
-                    arguments.colon2_token = Some(Token![::](arguments.lt_token.span));
-                }
-            }
-        }
-        this
-    } else {
-        Path::from(cont.ident.clone())
-    }
-}