Symbol's polyfill test

Symbol_test.js

applyPolyfills();var $S_polyfill$0 = Symbol["__polyfill__"];var $S_SET$0, $S_GET$0, $isSymbol$0;if($S_polyfill$0){$S_SET$0 = $S_polyfill$0["__setObjectSetter__"];$S_GET$0 = $S_polyfill$0["__setObjectGetter__"];$isSymbol$0 = $S_polyfill$0["__isSymbol__"];$S_polyfill$0 = true;}else {$S_polyfill$0 = false}
var private1 = Symbol();var $S$0 = $S_polyfill$0 && typeof private1 === 'object' && $isSymbol$0(private1);
var private2 = Symbol();var $S$1 = $S_polyfill$0 && typeof private2 === 'object' && $isSymbol$0(private2);
var publicProp1 = 'public_prop1';
var publicProp2 = (function(){return 'public_prop1'})();var $S$2 = $S_polyfill$0 && typeof publicProp2 === 'object' && $isSymbol$0(publicProp2);

function createSymbolOrObject(createSymbol){ return createSymbol ? Symbol() : {} };

{// simple
	var obj = {}, obj1 = {};
	($S$0 ? $S_SET$0(obj) : obj)[private1] = 'private property 1';
	var resultTrue = ($S$0 ? $S_GET$0(obj) : obj)[(private1)] == 'private property 1';
	var resultfalse = ($S$0 ? $S_GET$0(obj1) : obj1)[private1] == void 0;

	console.log(resultTrue, resultfalse);
$S_polyfill$0 && $S_GET$0(void 0);}

{// compound 1
	var obj1$0 = {}, obj2 = {};

	var result = (
		(obj2[publicProp1] = 0)
			, (($S$0 ? $S_SET$0(obj1$0) : obj1$0)[private1] = 0)
			, (obj1$0[private1] = 1)
			, (($S$0 ? $S_SET$0(obj2) : obj2)[private1] = 9)
			, (($S$1 ? $S_SET$0(obj1$0) : obj1$0)[private2] = 2)
			, (($S$1 ? $S_SET$0(obj2) : obj2)[private2] = 8)
			, (obj1$0[publicProp1] = 0)
			, (obj1$0[publicProp1] = 10)
		&& (
			obj2[publicProp1]
				+ ($S$0 ? $S_GET$0(obj1$0) : obj1$0)[private1]
				+ ($S$0 ? $S_GET$0(obj2) : obj2)[private1]
				+ ($S$1 ? $S_GET$0(obj1$0) : obj1$0)[private2]
				+ ($S$1 ? $S_GET$0(obj2) : obj2)[private2]
				+ obj1$0[publicProp1]
			)
	)

	console.log(result === 30);
$S_polyfill$0 && $S_GET$0(void 0);}

{// compound 2
	var obj1$1 = {}, obj2$0 = {};

	obj2$0[publicProp1] = 1;
	($S$0 || $S$1 ? $S_SET$0(obj2$0) : obj2$0)[private1] = 2;
	obj2$0[private2] = 3;

	($S$2 ? $S_SET$0(obj1$1) : obj1$1)[publicProp2] = 1;
	($S$0 ? $S_SET$0(obj2$0) : obj2$0)[private1] = 2;
	($S$1 ? $S_SET$0(obj1$1) : obj1$1)[private2] = 3;

	var result$0 = obj1$1[private2] + ($S$0 ? $S_GET$0(obj2$0) : obj2$0)[private1] + obj2$0[publicProp1] + ($S$0 ? $S_GET$0(obj2$0) : obj2$0)[private1] + ($S$1 ? $S_GET$0(obj2$0) : obj2$0)[private2] + obj1$1[publicProp2];

	console.log(result$0 === 12);
$S_polyfill$0 && $S_GET$0(void 0);}

{// compound 3
	var obj1$2 = {}, obj2$1 = {}, obj3 = {};

	obj1$2[publicProp1] = 'public';
	$S_SET$0(obj2$1)[private1] = obj1$2;
	$S_SET$0(obj3)[private2] = obj2$1;

	console.log($S_GET$0($S_GET$0(obj3[private2])[private1])[publicProp1] === 'public');
}

{// Object#methods
	var obj$0 = {};

	($S$0 || $S$1 ? $S_SET$0(obj$0) : obj$0)[private1] = 1;
	obj$0[private2] = 2;
	obj$0[publicProp1] = 7;

	console.log( Object.keys(obj$0).join("|") === "public_prop1" );
	console.log( Object.getOwnPropertyNames(obj$0).join("|") === "public_prop1" );
	console.log( !Object.getPropertyNames || Object.getPropertyNames(obj$0).join("|") === "public_prop1" );

	var symbols = Object.getOwnPropertySymbols(obj$0);
	console.log(symbols.length === 2, symbols[0] === private1, symbols[1] === private2);
	console.log(obj$0[private1] == 1, obj$0[private2] == 2);
}

{var $D$0;// simple typeof
	var obj$1 = {}, _boolean = true, num = 123, typeOfPrivate1 = ($S$0 ? 'symbol' : typeof private1);
	console.log(($S$0 ? 'symbol' : typeof private1) == 'symbol', typeof publicProp1 != 'symbol', typeOfPrivate1 == 'symbol');
	console.log(typeof obj$1 == 'object', ($S$0 ? 'symbol' : typeof private1) != 'object');
	console.log(typeof publicProp1 == 'string', typeof private1 != 'string');
	console.log(typeof _boolean == 'boolean', typeof private1 != 'boolean');
	console.log(typeof num == 'number', typeof private1 != 'number');

	var unknown = createSymbolOrObject(true);var $S$2 = $S_polyfill$0 && typeof unknown === 'object' && $isSymbol$0(unknown);
	console.log(($S$2 ? 'symbol' : typeof unknown) == 'symbol', (($D$0 = typeof (unknown = createSymbolOrObject())), ($S$2 = $S_polyfill$0 && typeof unknown === 'object' && $isSymbol$0(unknown)) ? 'symbol' : $D$0) == 'object', typeof unknown != 'string', typeof unknown !== 'number', typeof unknown !== 'boolean');

	var savePrivate1 = private1;
	((private1 = (function(){ return 'not_a_symbol' })()),($S$0 = $S_polyfill$0 && typeof private1 === 'object' && $isSymbol$0(private1)),private1);
	console.log(($S$0 ? 'symbol' : typeof private1) == 'string', ($S$0 ? 'symbol' : typeof private1) != 'object', typeof private1 !== 'number', typeof private1 !== 'boolean');
	private1 = savePrivate1;
}

function applyPolyfills() {
	;(function symbolPolyfill() {
		var symbolSupport = false
			, obj = {}
			, global = (new Function("return this"))()
			, globalSymbol
		;

		try {// native Symbol support test
			globalSymbol = global["Symbol"];
			if( typeof globalSymbol === 'function' ) {
				var symbol = global["Symbol"]();
				if( typeof symbol === 'symbol' ) {
					var random = Math.random();
					obj[symbol] = random;
					symbol = Object["getOwnPropertySymbols"](obj)[0];
					symbolSupport = obj[symbol] === random;
				}
			}
		}
		catch(e){}

		if( !symbolSupport ) {
			var currentSymbolParentObject = void 0
				, currentSymbolAssigmentIsGetter = false
				, symbolsUniqueNamePart = "SYMBOL" + (Math.random() * 1e9 | 0)
				, globalSymbolCounter = 0
				, RE_isSymbolName = new RegExp("__\\$" + symbolsUniqueNamePart + "_\\d+\\$__")
		        , globalSybmolsMap = {}
				, $getOwnPropertyNames = Object.getOwnPropertyNames
			;

			var SymbolConstructor = function SymbolConstructor(name) {
		        var symbolName = "__$" + symbolsUniqueNamePart + "_" + ++globalSymbolCounter + "$__";

		        globalSybmolsMap[symbolName] = this;

				Object.freeze(Object.defineProperties(this, {
					"name": {"value": name}
					, "__$symbol$__": {"value": symbolName}
				}));
			};
			SymbolConstructor.prototype = Object.create(null, {
				"toString": {"value": function(){
					if( !currentSymbolParentObject ) {
						throw new TypeError("Conversion from symbol to string")
					}
					var stringProp = this["__$symbol$__"];

					if( !currentSymbolAssigmentIsGetter && !(stringProp in currentSymbolParentObject) ) {
						Object.defineProperty(currentSymbolParentObject, stringProp, {"value": void 0, "configurable": true, "writable": true});
					}

					return stringProp;
				}}
				, "constructor": {"value": SymbolConstructor, "configurable": true, "writable": true}
			});

			globalSymbol = global["Symbol"] = function notAConstructor(name) {
				if (this instanceof notAConstructor) throw new Error("Symbol is not a constructor");

				return new SymbolConstructor(name);
			};
			globalSymbol["__polyfill__"] = {
				__isSymbol__: function(obj){ return obj && obj instanceof SymbolConstructor }
				, __setObjectSetter__: function(parentObj){
					currentSymbolParentObject = parentObj;
					currentSymbolAssigmentIsGetter = false;
					return parentObj;
				}
				, __setObjectGetter__: function(parentObj){
					currentSymbolParentObject = parentObj;
					currentSymbolAssigmentIsGetter = true;
					return parentObj;
				}
			};

			Object["getOwnPropertySymbols"] = function(obj) {
				var result = [];
				var names = $getOwnPropertyNames(obj);

				for ( var i = 0, len = names.length ; i < len ; i++ ) {
					var name = names[i];
					if ( RE_isSymbolName.test(name) ) {
						result.push(globalSybmolsMap[name]);
					}
				}

				return result;
			};

			Object.getOwnPropertyNames = function(obj) {
				var result = $getOwnPropertyNames(obj);

				for ( var i = 0, len = result.length ; i < len ; i++ ) {
					var name = result[i];
					if ( RE_isSymbolName.test(name) ) {
						result.splice(i, 1);
						len--;
						i--;
					}
				}

				return result;
			}
		}

		if( !globalSymbol["iterator"] )globalSymbol["iterator"] = globalSymbol("@@iterator");
		if( !globalSymbol["create"] )globalSymbol["create"] = globalSymbol("@@create");
		// TODO:: other pre-created symbol's
	})();
}