Function read_while

front-end/UglifyJS/parse-js.js:327–334

(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);