| David Tolnay | e082403 | 2017-12-27 15:25:56 -0500 | [diff] [blame] | 1 | use proc_macro2::{TokenNode, TokenTree}; |
| 2 | use cursor::Cursor; |
| David Tolnay | 203557a | 2017-12-27 23:59:33 -0500 | [diff] [blame^] | 3 | use parse_error; |
| 4 | use synom::PResult; |
| David Tolnay | e082403 | 2017-12-27 15:25:56 -0500 | [diff] [blame] | 5 | |
| 6 | #[cfg(feature = "full")] |
| 7 | use proc_macro2::Delimiter; |
| 8 | |
| 9 | pub fn delimited(input: Cursor) -> PResult<TokenTree> { |
| 10 | match input.token_tree() { |
| 11 | Some(( |
| 12 | rest, |
| 13 | token @ TokenTree { |
| 14 | kind: TokenNode::Group(..), |
| 15 | .. |
| 16 | }, |
| 17 | )) => Ok((rest, token)), |
| 18 | _ => parse_error(), |
| 19 | } |
| 20 | } |
| 21 | |
| 22 | #[cfg(feature = "full")] |
| 23 | pub fn braced(input: Cursor) -> PResult<TokenTree> { |
| 24 | match input.token_tree() { |
| 25 | Some(( |
| 26 | rest, |
| 27 | token @ TokenTree { |
| 28 | kind: TokenNode::Group(Delimiter::Brace, ..), |
| 29 | .. |
| 30 | }, |
| 31 | )) => Ok((rest, token)), |
| 32 | _ => parse_error(), |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | #[cfg(feature = "full")] |
| 37 | pub fn parenthesized(input: Cursor) -> PResult<TokenTree> { |
| 38 | match input.token_tree() { |
| 39 | Some(( |
| 40 | rest, |
| 41 | token @ TokenTree { |
| 42 | kind: TokenNode::Group(Delimiter::Parenthesis, ..), |
| 43 | .. |
| 44 | }, |
| 45 | )) => Ok((rest, token)), |
| 46 | _ => parse_error(), |
| 47 | } |
| 48 | } |