react-bootstrap/amd/transpiled/react-es6/lib/emptyFunction.js

Bootstrap 3 components build with React

define(
  ["./copyProperties","exports"],
  function(__dependency1__, __exports__) {
    "use strict";
    /**
     * Copyright 2013 Facebook, Inc.
     *
     * Licensed under the Apache License, Version 2.0 (the "License");
     * you may not use this file except in compliance with the License.
     * You may obtain a copy of the License at
     *
     * http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing, software
     * distributed under the License is distributed on an "AS IS" BASIS,
     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     * See the License for the specific language governing permissions and
     * limitations under the License.
     *
     * @providesModule emptyFunction
     */

    var copyProperties = __dependency1__["default"];

    function makeEmptyFunction (arg) {
      return function () {
        return arg;
      };
    }

    /**
     * This function accepts and discards inputs; it has no side effects. This is
     * primarily useful idiomatically for overridable function endpoints which
     * always need to be callable, since JS lacks a null-call idiom ala Cocoa.
     */
    function emptyFunction () {}

    copyProperties(emptyFunction, {
      thatReturns: makeEmptyFunction,
      thatReturnsFalse: makeEmptyFunction(false),
      thatReturnsTrue: makeEmptyFunction(true),
      thatReturnsNull: makeEmptyFunction(null),
      thatReturnsThis: function() { return this; },
      thatReturnsArgument: function(arg) { return arg; }
    });

    __exports__["default"] = emptyFunction;
  });