when/lib/state.js

/** @license MIT License (c) copyright 2010-2014 original author or authors */
/** @author Brian Cavalier */
/** @author John Hann */

(function(define) { 'use strict';
define(function() {

	return {
		pending: toPendingState,
		fulfilled: toFulfilledState,
		rejected: toRejectedState,
		inspect: inspect
	};

	function toPendingState() {
		return { state: 'pending' };
	}

	function toRejectedState(e) {
		return { state: 'rejected', reason: e };
	}

	function toFulfilledState(x) {
		return { state: 'fulfilled', value: x };
	}

	function inspect(handler) {
		var state = handler.state();
		return state === 0 ? toPendingState()
			 : state > 0   ? toFulfilledState(handler.value)
			               : toRejectedState(handler.value);
	}

});
}(typeof define === 'function' && define.amd ? define : function(factory) { module.exports = factory(); }));