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