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/home/yanggyein/yanggyein/yang_home/node_modules/es5-ext/promise/lazy.js
"use strict"; var isFunction = require("../function/is-function"); module.exports = function (executor) { var Constructor; if (isFunction(this)) { Constructor = this; } else if (typeof Promise === "function") { Constructor = Promise; } else { throw new TypeError("Could not resolve Promise constuctor"); } var lazyThen; var promise = new Constructor(function (resolve, reject) { lazyThen = function (onSuccess, onFailure) { if (!hasOwnProperty.call(this, "then")) { // Sanity check throw new Error("Unexpected (inherited) lazy then invocation"); } try { executor(resolve, reject); } catch (reason) { reject(reason); } delete this.then; return this.then(onSuccess, onFailure); }; }); return Object.defineProperty(promise, "then", { configurable: true, writable: true, value: lazyThen }); };