Method parse_grouped_expr

src/parser.rs:412–418

(&mut self)

    }

    fn parse_grouped_expr(&mut self) -> Option<Expr> {
        let exp = self.parse_expr(Precedence::Lowest);
        if !self.expect_peek(Token::RightParen) {
            return None;
        }
        exp
    }

    fn parse_if_expr(&mut self) -> Option<Expr> {
        if !self.expect_peek(Token::LeftParen) {