Haibo Huang | 4fbebf9 | 2020-05-26 17:08:50 -0700 | [diff] [blame^] | 1 | #[macro_use] |
| 2 | mod macros; |
| 3 | |
| 4 | use proc_macro2::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree}; |
| 5 | use quote::quote; |
| 6 | use std::iter::FromIterator; |
| 7 | use syn::{Expr, Type}; |
| 8 | |
| 9 | #[test] |
| 10 | fn parse_interpolated_leading_component() { |
| 11 | // mimics the token stream corresponding to `$mod::rest` |
| 12 | let tokens = TokenStream::from_iter(vec![ |
| 13 | TokenTree::Group(Group::new(Delimiter::None, quote! { first })), |
| 14 | TokenTree::Punct(Punct::new(':', Spacing::Joint)), |
| 15 | TokenTree::Punct(Punct::new(':', Spacing::Alone)), |
| 16 | TokenTree::Ident(Ident::new("rest", Span::call_site())), |
| 17 | ]); |
| 18 | |
| 19 | snapshot!(tokens.clone() as Expr, @r###" |
| 20 | Expr::Path { |
| 21 | path: Path { |
| 22 | segments: [ |
| 23 | PathSegment { |
| 24 | ident: "first", |
| 25 | arguments: None, |
| 26 | }, |
| 27 | PathSegment { |
| 28 | ident: "rest", |
| 29 | arguments: None, |
| 30 | }, |
| 31 | ], |
| 32 | }, |
| 33 | } |
| 34 | "###); |
| 35 | |
| 36 | snapshot!(tokens as Type, @r###" |
| 37 | Type::Path { |
| 38 | path: Path { |
| 39 | segments: [ |
| 40 | PathSegment { |
| 41 | ident: "first", |
| 42 | arguments: None, |
| 43 | }, |
| 44 | PathSegment { |
| 45 | ident: "rest", |
| 46 | arguments: None, |
| 47 | }, |
| 48 | ], |
| 49 | }, |
| 50 | } |
| 51 | "###); |
| 52 | } |