babel-core/lib/babel/transformation/transformers/playground/memoization-operator.js

Turn ES6 code into readable vanilla ES5 with source maps

"use strict";

var _interopRequire = function (obj) { return obj && obj.__esModule ? obj["default"] : obj; };

var build = _interopRequire(require("../../helpers/build-conditional-assignment-operator-transformer"));

var t = _interopRequire(require("../../../types"));

var playground = exports.playground = true;

build(exports, {
  is: (function (_is) {
    var _isWrapper = function is(_x) {
      return _is.apply(this, arguments);
    };

    _isWrapper.toString = function () {
      return _is.toString();
    };

    return _isWrapper;
  })(function (node) {
    var is = t.isAssignmentExpression(node, { operator: "?=" });
    if (is) t.assertMemberExpression(node.left);
    return is;
  }),

  build: function build(node, file) {
    return t.unaryExpression("!", t.callExpression(t.memberExpression(file.addHelper("has-own"), t.identifier("call")), [node.object, node.property]), true);
  }
});
exports.__esModule = true;