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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/serde_derive/src/pretend.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/serde_derive/src/pretend.rs')
-rw-r--r--vendor/serde_derive/src/pretend.rs185
1 files changed, 0 insertions, 185 deletions
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)*)
-}