Function read_while

lib/parse-js.js:357–364

(pred)

    };

    function read_while(pred) {
        var ret = "", ch = peek(), i = 0;
        while (ch && pred(ch, i++)) {
            ret += next();
            ch = peek();
        }
        return ret;
    };

    function parse_error(err) {
        js_error(err, S.tokline, S.tokcol, S.tokpos);