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// Generated by CoffeeScript 1.12.4
var Pattern, Unescaper, Utils;

Utils = require('./Utils');

Pattern = require('./Pattern');

Unescaper = (function() {
  function Unescaper() {}

  Unescaper.PATTERN_ESCAPED_CHARACTER = new Pattern('\\\\([0abt\tnvfre "\\/\\\\N_LP]|x[0-9a-fA-F]{2}|u[0-9a-fA-F]{4}|U[0-9a-fA-F]{8})');

  Unescaper.unescapeSingleQuotedString = function(value) {
    return value.replace(/\'\'/g, '\'');
  };

  Unescaper.unescapeDoubleQuotedString = function(value) {
    if (this._unescapeCallback == null) {
      this._unescapeCallback = (function(_this) {
        return function(str) {
          return _this.unescapeCharacter(str);
        };
      })(this);
    }
    return this.PATTERN_ESCAPED_CHARACTER.replace(value, this._unescapeCallback);
  };

  Unescaper.unescapeCharacter = function(value) {
    var ch;
    ch = String.fromCharCode;
    switch (value.charAt(1)) {
      case '0':
        return ch(0);
      case 'a':
        return ch(7);
      case 'b':
        return ch(8);
      case 't':
        return "\t";
      case "\t":
        return "\t";
      case 'n':
        return "\n";
      case 'v':
        return ch(11);
      case 'f':
        return ch(12);
      case 'r':
        return ch(13);
      case 'e':
        return ch(27);
      case ' ':
        return ' ';
      case '"':
        return '"';
      case '/':
        return '/';
      case '\\':
        return '\\';
      case 'N':
        return ch(0x0085);
      case '_':
        return ch(0x00A0);
      case 'L':
        return ch(0x2028);
      case 'P':
        return ch(0x2029);
      case 'x':
        return Utils.utf8chr(Utils.hexDec(value.substr(2, 2)));
      case 'u':
        return Utils.utf8chr(Utils.hexDec(value.substr(2, 4)));
      case 'U':
        return Utils.utf8chr(Utils.hexDec(value.substr(2, 8)));
      default:
        return '';
    }
  };

  return Unescaper;

})();

module.exports = Unescaper;