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-rw-r--r--vendor/syn/tests/test_derive_input.rs781
1 files changed, 781 insertions, 0 deletions
diff --git a/vendor/syn/tests/test_derive_input.rs b/vendor/syn/tests/test_derive_input.rs
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+++ b/vendor/syn/tests/test_derive_input.rs
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+#![allow(
+ clippy::assertions_on_result_states,
+ clippy::manual_let_else,
+ clippy::too_many_lines,
+ clippy::uninlined_format_args
+)]
+
+#[macro_use]
+mod macros;
+
+use quote::quote;
+use syn::{Data, DeriveInput};
+
+#[test]
+fn test_unit() {
+ let input = quote! {
+ struct Unit;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Inherited,
+ ident: "Unit",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_struct() {
+ let input = quote! {
+ #[derive(Debug, Clone)]
+ pub struct Item {
+ pub ident: Ident,
+ pub attrs: Vec<Attribute>
+ }
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ attrs: [
+ Attribute {
+ style: AttrStyle::Outer,
+ meta: Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "derive",
+ },
+ ],
+ },
+ delimiter: MacroDelimiter::Paren,
+ tokens: TokenStream(`Debug , Clone`),
+ },
+ },
+ ],
+ vis: Visibility::Public,
+ ident: "Item",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Named {
+ named: [
+ Field {
+ vis: Visibility::Public,
+ ident: Some("ident"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Ident",
+ },
+ ],
+ },
+ },
+ },
+ Token![,],
+ Field {
+ vis: Visibility::Public,
+ ident: Some("attrs"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Vec",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ GenericArgument::Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Attribute",
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ }
+ "###);
+
+ snapshot!(&input.attrs[0].meta, @r###"
+ Meta::List {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "derive",
+ },
+ ],
+ },
+ delimiter: MacroDelimiter::Paren,
+ tokens: TokenStream(`Debug , Clone`),
+ }
+ "###);
+}
+
+#[test]
+fn test_union() {
+ let input = quote! {
+ union MaybeUninit<T> {
+ uninit: (),
+ value: T
+ }
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Inherited,
+ ident: "MaybeUninit",
+ generics: Generics {
+ lt_token: Some,
+ params: [
+ GenericParam::Type(TypeParam {
+ ident: "T",
+ }),
+ ],
+ gt_token: Some,
+ },
+ data: Data::Union {
+ fields: FieldsNamed {
+ named: [
+ Field {
+ vis: Visibility::Inherited,
+ ident: Some("uninit"),
+ colon_token: Some,
+ ty: Type::Tuple,
+ },
+ Token![,],
+ Field {
+ vis: Visibility::Inherited,
+ ident: Some("value"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ }
+ "###);
+}
+
+#[test]
+#[cfg(feature = "full")]
+fn test_enum() {
+ let input = quote! {
+ /// See the std::result module documentation for details.
+ #[must_use]
+ pub enum Result<T, E> {
+ Ok(T),
+ Err(E),
+ Surprise = 0isize,
+
+ // Smuggling data into a proc_macro_derive,
+ // in the style of https://github.com/dtolnay/proc-macro-hack
+ ProcMacroHack = (0, "data").0
+ }
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ attrs: [
+ Attribute {
+ style: AttrStyle::Outer,
+ meta: Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "doc",
+ },
+ ],
+ },
+ value: Expr::Lit {
+ lit: " See the std::result module documentation for details.",
+ },
+ },
+ },
+ Attribute {
+ style: AttrStyle::Outer,
+ meta: Meta::Path {
+ segments: [
+ PathSegment {
+ ident: "must_use",
+ },
+ ],
+ },
+ },
+ ],
+ vis: Visibility::Public,
+ ident: "Result",
+ generics: Generics {
+ lt_token: Some,
+ params: [
+ GenericParam::Type(TypeParam {
+ ident: "T",
+ }),
+ Token![,],
+ GenericParam::Type(TypeParam {
+ ident: "E",
+ }),
+ ],
+ gt_token: Some,
+ },
+ data: Data::Enum {
+ variants: [
+ Variant {
+ ident: "Ok",
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Visibility::Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ Token![,],
+ Variant {
+ ident: "Err",
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Visibility::Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "E",
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ },
+ Token![,],
+ Variant {
+ ident: "Surprise",
+ fields: Fields::Unit,
+ discriminant: Some(Expr::Lit {
+ lit: 0isize,
+ }),
+ },
+ Token![,],
+ Variant {
+ ident: "ProcMacroHack",
+ fields: Fields::Unit,
+ discriminant: Some(Expr::Field {
+ base: Expr::Tuple {
+ elems: [
+ Expr::Lit {
+ lit: 0,
+ },
+ Token![,],
+ Expr::Lit {
+ lit: "data",
+ },
+ ],
+ },
+ member: Member::Unnamed(Index {
+ index: 0,
+ }),
+ }),
+ },
+ ],
+ },
+ }
+ "###);
+
+ let meta_items: Vec<_> = input.attrs.into_iter().map(|attr| attr.meta).collect();
+
+ snapshot!(meta_items, @r###"
+ [
+ Meta::NameValue {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "doc",
+ },
+ ],
+ },
+ value: Expr::Lit {
+ lit: " See the std::result module documentation for details.",
+ },
+ },
+ Meta::Path {
+ segments: [
+ PathSegment {
+ ident: "must_use",
+ },
+ ],
+ },
+ ]
+ "###);
+}
+
+#[test]
+fn test_attr_with_non_mod_style_path() {
+ let input = quote! {
+ #[inert <T>]
+ struct S;
+ };
+
+ syn::parse2::<DeriveInput>(input).unwrap_err();
+}
+
+#[test]
+fn test_attr_with_mod_style_path_with_self() {
+ let input = quote! {
+ #[foo::self]
+ struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ attrs: [
+ Attribute {
+ style: AttrStyle::Outer,
+ meta: Meta::Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ },
+ Token![::],
+ PathSegment {
+ ident: "self",
+ },
+ ],
+ },
+ },
+ ],
+ vis: Visibility::Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ snapshot!(&input.attrs[0].meta, @r###"
+ Meta::Path {
+ segments: [
+ PathSegment {
+ ident: "foo",
+ },
+ Token![::],
+ PathSegment {
+ ident: "self",
+ },
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_pub_restricted() {
+ // Taken from tests/rust/src/test/ui/resolve/auxiliary/privacy-struct-ctor.rs
+ let input = quote! {
+ pub(in m) struct Z(pub(in m::n) u8);
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Restricted {
+ in_token: Some,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "m",
+ },
+ ],
+ },
+ },
+ ident: "Z",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Visibility::Restricted {
+ in_token: Some,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "m",
+ },
+ Token![::],
+ PathSegment {
+ ident: "n",
+ },
+ ],
+ },
+ },
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "u8",
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_pub_restricted_crate() {
+ let input = quote! {
+ pub(crate) struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Restricted {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "crate",
+ },
+ ],
+ },
+ },
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_pub_restricted_super() {
+ let input = quote! {
+ pub(super) struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Restricted {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "super",
+ },
+ ],
+ },
+ },
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_pub_restricted_in_super() {
+ let input = quote! {
+ pub(in super) struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Restricted {
+ in_token: Some,
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "super",
+ },
+ ],
+ },
+ },
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_fields_on_unit_struct() {
+ let input = quote! {
+ struct S;
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unit,
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ let data = match input.data {
+ Data::Struct(data) => data,
+ _ => panic!("expected a struct"),
+ };
+
+ assert_eq!(0, data.fields.iter().count());
+}
+
+#[test]
+fn test_fields_on_named_struct() {
+ let input = quote! {
+ struct S {
+ foo: i32,
+ pub bar: String,
+ }
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Named {
+ named: [
+ Field {
+ vis: Visibility::Inherited,
+ ident: Some("foo"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ },
+ ],
+ },
+ },
+ },
+ Token![,],
+ Field {
+ vis: Visibility::Public,
+ ident: Some("bar"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "String",
+ },
+ ],
+ },
+ },
+ },
+ Token![,],
+ ],
+ },
+ },
+ }
+ "###);
+
+ let data = match input.data {
+ Data::Struct(data) => data,
+ _ => panic!("expected a struct"),
+ };
+
+ snapshot!(data.fields.into_iter().collect::<Vec<_>>(), @r###"
+ [
+ Field {
+ vis: Visibility::Inherited,
+ ident: Some("foo"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ },
+ ],
+ },
+ },
+ },
+ Field {
+ vis: Visibility::Public,
+ ident: Some("bar"),
+ colon_token: Some,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "String",
+ },
+ ],
+ },
+ },
+ },
+ ]
+ "###);
+}
+
+#[test]
+fn test_fields_on_tuple_struct() {
+ let input = quote! {
+ struct S(i32, pub String);
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Visibility::Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ },
+ ],
+ },
+ },
+ },
+ Token![,],
+ Field {
+ vis: Visibility::Public,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "String",
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ semi_token: Some,
+ },
+ }
+ "###);
+
+ let data = match input.data {
+ Data::Struct(data) => data,
+ _ => panic!("expected a struct"),
+ };
+
+ snapshot!(data.fields.iter().collect::<Vec<_>>(), @r###"
+ [
+ Field {
+ vis: Visibility::Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "i32",
+ },
+ ],
+ },
+ },
+ },
+ Field {
+ vis: Visibility::Public,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "String",
+ },
+ ],
+ },
+ },
+ },
+ ]
+ "###);
+}
+
+#[test]
+fn test_ambiguous_crate() {
+ let input = quote! {
+ // The field type is `(crate::X)` not `crate (::X)`.
+ struct S(crate::X);
+ };
+
+ snapshot!(input as DeriveInput, @r###"
+ DeriveInput {
+ vis: Visibility::Inherited,
+ ident: "S",
+ generics: Generics,
+ data: Data::Struct {
+ fields: Fields::Unnamed {
+ unnamed: [
+ Field {
+ vis: Visibility::Inherited,
+ ty: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "crate",
+ },
+ Token![::],
+ PathSegment {
+ ident: "X",
+ },
+ ],
+ },
+ },
+ },
+ ],
+ },
+ semi_token: Some,
+ },
+ }
+ "###);
+}
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