Function lookahead2

lib/assets/javascripts/JSXTransformer.js:4067–4094

()

    }

    function lookahead2() {
        var adv, pos, line, start, result;

        // If we are collecting the tokens, don't grab the next one yet.
        /* istanbul ignore next */
        adv = (typeof extra.advance === 'function') ? extra.advance : advance;

        pos = index;
        line = lineNumber;
        start = lineStart;

        // Scan for the next immediate token.
        /* istanbul ignore if */
        if (lookahead === null) {
            lookahead = adv();
        }
        index = lookahead.range[1];
        lineNumber = lookahead.lineNumber;
        lineStart = lookahead.lineStart;

        // Grab the token right after.
        result = adv();
        index = pos;
        lineNumber = line;
        lineStart = start;

        return result;
    }

    function rewind(token) {
        index = token.range[0];