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-rw-r--r--vendor/syn/tests/test_ty.rs397
1 files changed, 397 insertions, 0 deletions
diff --git a/vendor/syn/tests/test_ty.rs b/vendor/syn/tests/test_ty.rs
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+#![allow(clippy::uninlined_format_args)]
+
+#[macro_use]
+mod macros;
+
+use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
+use quote::{quote, ToTokens as _};
+use syn::punctuated::Punctuated;
+use syn::{parse_quote, token, Token, Type, TypeTuple};
+
+#[test]
+fn test_mut_self() {
+ syn::parse_str::<Type>("fn(mut self)").unwrap();
+ syn::parse_str::<Type>("fn(mut self,)").unwrap();
+ syn::parse_str::<Type>("fn(mut self: ())").unwrap();
+ syn::parse_str::<Type>("fn(mut self: ...)").unwrap_err();
+ syn::parse_str::<Type>("fn(mut self: mut self)").unwrap_err();
+ syn::parse_str::<Type>("fn(mut self::T)").unwrap_err();
+}
+
+#[test]
+fn test_macro_variable_type() {
+ // mimics the token stream corresponding to `$ty<T>`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { ty })),
+ TokenTree::Punct(Punct::new('<', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("T", Span::call_site())),
+ TokenTree::Punct(Punct::new('>', Spacing::Alone)),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "ty",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ GenericArgument::Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ }
+ "###);
+
+ // mimics the token stream corresponding to `$ty::<T>`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { ty })),
+ TokenTree::Punct(Punct::new(':', Spacing::Joint)),
+ TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+ TokenTree::Punct(Punct::new('<', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("T", Span::call_site())),
+ TokenTree::Punct(Punct::new('>', Spacing::Alone)),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "ty",
+ arguments: PathArguments::AngleBracketed {
+ colon2_token: Some,
+ args: [
+ GenericArgument::Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_group_angle_brackets() {
+ // mimics the token stream corresponding to `Option<$ty>`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Ident(Ident::new("Option", Span::call_site())),
+ TokenTree::Punct(Punct::new('<', Spacing::Alone)),
+ TokenTree::Group(Group::new(Delimiter::None, quote! { Vec<u8> })),
+ TokenTree::Punct(Punct::new('>', Spacing::Alone)),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Option",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ GenericArgument::Type(Type::Group {
+ elem: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Vec",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ GenericArgument::Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "u8",
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ },
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_group_colons() {
+ // mimics the token stream corresponding to `$ty::Item`
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { Vec<u8> })),
+ TokenTree::Punct(Punct::new(':', Spacing::Joint)),
+ TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("Item", Span::call_site())),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Vec",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ GenericArgument::Type(Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "u8",
+ },
+ ],
+ },
+ }),
+ ],
+ },
+ },
+ Token![::],
+ PathSegment {
+ ident: "Item",
+ },
+ ],
+ },
+ }
+ "###);
+
+ let tokens = TokenStream::from_iter(vec![
+ TokenTree::Group(Group::new(Delimiter::None, quote! { [T] })),
+ TokenTree::Punct(Punct::new(':', Spacing::Joint)),
+ TokenTree::Punct(Punct::new(':', Spacing::Alone)),
+ TokenTree::Ident(Ident::new("Element", Span::call_site())),
+ ]);
+
+ snapshot!(tokens as Type, @r###"
+ Type::Path {
+ qself: Some(QSelf {
+ ty: Type::Slice {
+ elem: Type::Path {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "T",
+ },
+ ],
+ },
+ },
+ },
+ position: 0,
+ }),
+ path: Path {
+ leading_colon: Some,
+ segments: [
+ PathSegment {
+ ident: "Element",
+ },
+ ],
+ },
+ }
+ "###);
+}
+
+#[test]
+fn test_trait_object() {
+ let tokens = quote!(dyn for<'a> Trait<'a> + 'static);
+ snapshot!(tokens as Type, @r###"
+ Type::TraitObject {
+ dyn_token: Some,
+ bounds: [
+ TypeParamBound::Trait(TraitBound {
+ lifetimes: Some(BoundLifetimes {
+ lifetimes: [
+ GenericParam::Lifetime(LifetimeParam {
+ lifetime: Lifetime {
+ ident: "a",
+ },
+ }),
+ ],
+ }),
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ arguments: PathArguments::AngleBracketed {
+ args: [
+ GenericArgument::Lifetime(Lifetime {
+ ident: "a",
+ }),
+ ],
+ },
+ },
+ ],
+ },
+ }),
+ Token![+],
+ TypeParamBound::Lifetime {
+ ident: "static",
+ },
+ ],
+ }
+ "###);
+
+ let tokens = quote!(dyn 'a + Trait);
+ snapshot!(tokens as Type, @r###"
+ Type::TraitObject {
+ dyn_token: Some,
+ bounds: [
+ TypeParamBound::Lifetime {
+ ident: "a",
+ },
+ Token![+],
+ TypeParamBound::Trait(TraitBound {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ },
+ ],
+ },
+ }),
+ ],
+ }
+ "###);
+
+ // None of the following are valid Rust types.
+ syn::parse_str::<Type>("for<'a> dyn Trait<'a>").unwrap_err();
+ syn::parse_str::<Type>("dyn for<'a> 'a + Trait").unwrap_err();
+}
+
+#[test]
+fn test_trailing_plus() {
+ #[rustfmt::skip]
+ let tokens = quote!(impl Trait +);
+ snapshot!(tokens as Type, @r###"
+ Type::ImplTrait {
+ bounds: [
+ TypeParamBound::Trait(TraitBound {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ },
+ ],
+ },
+ }),
+ Token![+],
+ ],
+ }
+ "###);
+
+ #[rustfmt::skip]
+ let tokens = quote!(dyn Trait +);
+ snapshot!(tokens as Type, @r###"
+ Type::TraitObject {
+ dyn_token: Some,
+ bounds: [
+ TypeParamBound::Trait(TraitBound {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ },
+ ],
+ },
+ }),
+ Token![+],
+ ],
+ }
+ "###);
+
+ #[rustfmt::skip]
+ let tokens = quote!(Trait +);
+ snapshot!(tokens as Type, @r###"
+ Type::TraitObject {
+ bounds: [
+ TypeParamBound::Trait(TraitBound {
+ path: Path {
+ segments: [
+ PathSegment {
+ ident: "Trait",
+ },
+ ],
+ },
+ }),
+ Token![+],
+ ],
+ }
+ "###);
+}
+
+#[test]
+fn test_tuple_comma() {
+ let mut expr = TypeTuple {
+ paren_token: token::Paren::default(),
+ elems: Punctuated::new(),
+ };
+ snapshot!(expr.to_token_stream() as Type, @"Type::Tuple");
+
+ expr.elems.push_value(parse_quote!(_));
+ // Must not parse to Type::Paren
+ snapshot!(expr.to_token_stream() as Type, @r###"
+ Type::Tuple {
+ elems: [
+ Type::Infer,
+ Token![,],
+ ],
+ }
+ "###);
+
+ expr.elems.push_punct(<Token![,]>::default());
+ snapshot!(expr.to_token_stream() as Type, @r###"
+ Type::Tuple {
+ elems: [
+ Type::Infer,
+ Token![,],
+ ],
+ }
+ "###);
+
+ expr.elems.push_value(parse_quote!(_));
+ snapshot!(expr.to_token_stream() as Type, @r###"
+ Type::Tuple {
+ elems: [
+ Type::Infer,
+ Token![,],
+ Type::Infer,
+ ],
+ }
+ "###);
+
+ expr.elems.push_punct(<Token![,]>::default());
+ snapshot!(expr.to_token_stream() as Type, @r###"
+ Type::Tuple {
+ elems: [
+ Type::Infer,
+ Token![,],
+ Type::Infer,
+ Token![,],
+ ],
+ }
+ "###);
+}
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