exports = function(str) {
    str = ('__' + str + '__').split('');
    var mode = {
        singleQuote: false,
        doubleQuote: false,
        regex: false,
        blockComment: false,
        lineComment: false,
        condComp: false
    };
    for (var i = 0, l = str.length; i < l; i++) {
        if (mode.regex) {
            if (str[i] === '/' && str[i - 1] !== '\\') mode.regex = false;
            continue;
        }
        if (mode.singleQuote) {
            if (str[i] === "'" && str[i - 1] !== '\\') mode.singleQuote = false;
            continue;
        }
        if (mode.doubleQuote) {
            if (str[i] === '"' && str[i - 1] !== '\\') mode.doubleQuote = false;
            continue;
        }
        if (mode.blockComment) {
            if (str[i] === '*' && str[i + 1] === '/') {
                str[i + 1] = '';
                mode.blockComment = false;
            }
            str[i] = '';
            continue;
        }
        if (mode.lineComment) {
            if (str[i + 1] === '\n') mode.lineComment = false;
            str[i] = '';
            continue;
        }
        mode.doubleQuote = str[i] === '"';
        mode.singleQuote = str[i] === "'";
        if (str[i] === '/') {
            if (str[i + 1] === '*') {
                str[i] = '';
                mode.blockComment = true;
                continue;
            }
            if (str[i + 1] === '/') {
                str[i] = '';
                mode.lineComment = true;
                continue;
            }
            mode.regex = true;
        }
    }
    return str.join('').slice(2, -2);
};

module.exports = exports;