Method lookahead

source/python.js:11469–11475

()

                return this.next_tokens[0];
            }
            lookahead() {
                if (!this.next_tokens[1].kind) {
                    this.position += this.cur().text().length;
                    this.lex(this.next_tokens[1]);
                }
                return this.next_tokens[1];
            }
            next() {
                const [cur] = this.next_tokens;
                [, this.next_tokens[0], this.next_tokens[1], this.next_tokens[2]] = this.next_tokens;