Method match_token

cranelift/reader/src/parser.rs:534–540

Match and consume a token without payload.

(&mut self, want: Token<'a>, err_msg: &str)

    // Match and consume a token without payload.
    fn match_token(&mut self, want: Token<'a>, err_msg: &str) -> ParseResult<Token<'a>> {
        if self.token() == Some(want) {
            Ok(self.consume())
        } else {
            err!(self.loc, err_msg)
        }
    }

    // If the next token is a `want`, consume it, otherwise do nothing.
    fn optional(&mut self, want: Token<'a>) -> bool {