lr-core/subclassable/map.js

Line Rider core library

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _assignPrototype = require('./assignPrototype.js');

var _assignPrototype2 = _interopRequireDefault(_assignPrototype);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

class SubclassableMap {
  constructor(...args) {
    this.__map__ = new Map(...args);
  }
  get size() {
    return this.__map__.size;
  }
}
(0, _assignPrototype2.default)(Map, SubclassableMap, '__map__');

const MAP_SUBCLASSABLE = (() => {
  var key = {};
  class M extends Map {}
  try {
    var map = new M();
    map.set(key, 123);
  } catch (e) {
    return false;
  }

  return map instanceof M && map.has(key) && map.get(key) === 123;
})();

exports.default = MAP_SUBCLASSABLE ? Map : SubclassableMap;