Macro syn::parenthesized [−][src]
Parse a set of parentheses and expose their content to subsequent parsers.
Example
use syn::{parenthesized, token, Ident, Result, Token, Type}; use syn::parse::{Parse, ParseStream}; use syn::punctuated::Punctuated; // Parse a simplified tuple struct syntax like: // // struct S(A, B); struct TupleStruct { struct_token: Token![struct], ident: Ident, paren_token: token::Paren, fields: Punctuated<Type, Token![,]>, semi_token: Token![;], } impl Parse for TupleStruct { fn parse(input: ParseStream) -> Result<Self> { let content; Ok(TupleStruct { struct_token: input.parse()?, ident: input.parse()?, paren_token: parenthesized!(content in input), fields: content.parse_terminated(Type::parse)?, semi_token: input.parse()?, }) } }