var global = require('../internals/global');
var DESCRIPTORS = require('../internals/descriptors');
var UNSUPPORTED_DOT_ALL = require('../internals/regexp-unsupported-dot-all');
var classof = require('../internals/classof-raw');
var defineProperty = require('../internals/object-define-property').f;
var getInternalState = require('../internals/internal-state').get;

var RegExpPrototype = RegExp.prototype;
var TypeError = global.TypeError;

// `RegExp.prototype.dotAll` getter
// https://tc39.es/ecma262/#sec-get-regexp.prototype.dotall
if (DESCRIPTORS && UNSUPPORTED_DOT_ALL) {
  defineProperty(RegExpPrototype, 'dotAll', {
    configurable: true,
    get: function () {
      if (this === RegExpPrototype) return undefined;
      // We can't use InternalStateModule.getterFor because
      // we don't add metadata for regexps created by a literal.
      if (classof(this) === 'RegExp') {
        return !!getInternalState(this).dotAll;
      }
      throw TypeError('Incompatible receiver, RegExp required');
    }
  });
}