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#[macro_use]
mod macros;
use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
use quote::quote;
use std::iter::FromIterator;
use syn::Type;
#[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_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 `$ty<T>`
let tokens = TokenStream::from_iter(vec![
TokenTree::Group(Group::new(Delimiter::None, quote! { ty })),
TokenTree::Punct(Punct::new('<', Spacing::Alone)),
TokenTree::Ident(Ident::new("T", Span::call_site())),
TokenTree::Punct(Punct::new('>', Spacing::Alone)),
]);
snapshot!(tokens as Type, @r###"
Type::Path {
path: Path {
segments: [
PathSegment {
ident: "ty",
arguments: PathArguments::AngleBracketed {
args: [
Type(Type::Path {
path: Path {
segments: [
PathSegment {
ident: "T",
arguments: None,
},
],
},
}),
],
},
},
],
},
}
"###);
// mimics the token stream corresponding to `$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: [
Type(Type::Path {
path: Path {
segments: [
PathSegment {
ident: "T",
arguments: None,
},
],
},
}),
],
},
},
],
},
}
"###);
}
#[test]
fn test_group_angle_brackets() {
// mimics the token stream corresponding to `Option<$ty>`
let tokens = TokenStream::from_iter(vec![
TokenTree::Ident(Ident::new("Option", Span::call_site())),
TokenTree::Punct(Punct::new('<', Spacing::Alone)),
TokenTree::Group(Group::new(Delimiter::None, quote! { Vec<u8> })),
TokenTree::Punct(Punct::new('>', Spacing::Alone)),
]);
snapshot!(tokens as Type, @r###"
Type::Path {
path: Path {
segments: [
PathSegment {
ident: "Option",
arguments: PathArguments::AngleBracketed {
args: [
Type(Type::Group {
elem: Type::Path {
path: Path {
segments: [
PathSegment {
ident: "Vec",
arguments: PathArguments::AngleBracketed {
args: [
Type(Type::Path {
path: Path {
segments: [
PathSegment {
ident: "u8",
arguments: None,
},
],
},
}),
],
},
},
],
},
},
}),
],
},
},
],
},
}
"###);
}
#[test]
fn test_group_colons() {
// mimics the token stream corresponding to `$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: [
Type(Type::Path {
path: Path {
segments: [
PathSegment {
ident: "u8",
arguments: None,
},
],
},
}),
],
},
},
PathSegment {
ident: "Item",
arguments: None,
},
],
},
}
"###);
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",
arguments: None,
},
],
},
},
},
position: 0,
}),
path: Path {
leading_colon: Some,
segments: [
PathSegment {
ident: "Element",
arguments: None,
},
],
},
}
"###);
}