68 lines
1.9 KiB
Rust
68 lines
1.9 KiB
Rust
#[macro_use]
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mod macros;
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use proc_macro2::{Delimiter, Group, TokenStream, TokenTree};
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use quote::quote;
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use std::iter::FromIterator;
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use syn::{Item, Pat, Stmt};
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#[test]
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fn test_pat_ident() {
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match syn::parse2(quote!(self)).unwrap() {
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Pat::Ident(_) => (),
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value => panic!("expected PatIdent, got {:?}", value),
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}
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}
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#[test]
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fn test_pat_path() {
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match syn::parse2(quote!(self::CONST)).unwrap() {
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Pat::Path(_) => (),
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value => panic!("expected PatPath, got {:?}", value),
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}
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}
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#[test]
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fn test_leading_vert() {
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// https://github.com/rust-lang/rust/blob/1.43.0/src/test/ui/or-patterns/remove-leading-vert.rs
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syn::parse_str::<Item>("fn f() {}").unwrap();
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syn::parse_str::<Item>("fn fun1(| A: E) {}").unwrap_err();
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syn::parse_str::<Item>("fn fun2(|| A: E) {}").unwrap_err();
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syn::parse_str::<Stmt>("let | () = ();").unwrap();
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syn::parse_str::<Stmt>("let (| A): E;").unwrap();
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syn::parse_str::<Stmt>("let (|| A): (E);").unwrap_err();
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syn::parse_str::<Stmt>("let (| A,): (E,);").unwrap();
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syn::parse_str::<Stmt>("let [| A]: [E; 1];").unwrap();
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syn::parse_str::<Stmt>("let [|| A]: [E; 1];").unwrap_err();
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syn::parse_str::<Stmt>("let TS(| A): TS;").unwrap();
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syn::parse_str::<Stmt>("let TS(|| A): TS;").unwrap_err();
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syn::parse_str::<Stmt>("let NS { f: | A }: NS;").unwrap();
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syn::parse_str::<Stmt>("let NS { f: || A }: NS;").unwrap_err();
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}
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#[test]
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fn test_group() {
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let group = Group::new(Delimiter::None, quote!(Some(_)));
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let tokens = TokenStream::from_iter(vec![TokenTree::Group(group)]);
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snapshot!(tokens as Pat, @r###"
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Pat::TupleStruct {
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path: Path {
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segments: [
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PathSegment {
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ident: "Some",
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arguments: None,
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},
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],
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},
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pat: PatTuple {
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elems: [
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Pat::Wild,
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],
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},
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}
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"###);
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}
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