Adding chapter 12 code

Author: stimms

Chapter 12/traceur1.js

@@ -0,0 +1,15 @@
+classBaseStructure{
+constructor(){
+console.log("Structure built");
+}
+}
+
+classCastleextendsBaseStructure{
+constructor(name){
+this.name=name;
+super();
+}
+Build(){
+console.log("Castle built: "+this.name);
+}
+}

Chapter 12/traceur1.out.js

@@ -0,0 +1,15 @@
+varBaseStructure=functionBaseStructure(){
+"use strict";
+console.log("Structure built");
+};
+($traceurRuntime.createClass)(BaseStructure,{},{});
+varCastle=functionCastle(name){
+"use strict";
+this.name=name;
+$traceurRuntime.superCall(this,$Castle.prototype,"constructor",[]);
+};
+var$Castle=Castle;
+($traceurRuntime.createClass)(Castle,{Build: function(){
+"use strict";
+console.log("Castle built: "+this.name);
+}},{},BaseStructure);

Chapter 12/traceur2.js

@@ -0,0 +1,6 @@
+functionCreateFeast(meat,drink="wine"){
+console.log("The meat is: "+meat);
+console.log("The drink is: "+drink);
+}
+CreateFeast("Boar","Beer");
+CreateFeast("Venison");

Chapter 12/traceur2.out.js

@@ -0,0 +1,7 @@
+functionCreateFeast(meat){
+vardrink=arguments[1]!==(void0) ? arguments[1] : "wine";
+console.log("The meat is: "+meat);
+console.log("The drink is: "+drink);
+}
+CreateFeast("Boar","Beer");
+CreateFeast("Venison");

Chapter 12/traceur3.js

@@ -0,0 +1,3 @@
+vararmy1Size=5000;
+vararmy2Size=3578;
+console.log(`The surviving army will be ${army1Size>army2Size ? "Army 1": "Army 2"}`);

Chapter 12/traceur3.out.js

@@ -0,0 +1,3 @@
+vararmy1Size=5000;
+vararmy2Size=3578;
+console.log(("The surviving army will be "+(army1Size>army2Size ? "Army 1" : "Army 2")));

Chapter 12/traceur4.js

@@ -0,0 +1,8 @@
+if(true)
+{
+varoutside=9;
+letinside=7;
+}
+
+console.log(outside);
+console.log(inside);

Chapter 12/traceur4.out.js

@@ -0,0 +1,7 @@
+varinside$__0;
+if(true){
+varoutside=9;
+inside$__0=7;
+}
+console.log(outside);
+console.log(inside);

Chapter 12/traceur5.js

@@ -0,0 +1,22 @@
+functiontimeout(ms){
+returnnewPromise((resolve)=>{
+setTimeout(resolve,ms);
+});
+}
+
+asyncfunctionasyncValue(value){
+awaittimeout(1500);
+returnvalue;
+}
+
+(asyncfunction(){
+console.log("Starting.");
+varvaluePromise=asyncValue(42).catch(console.error.bind(console));
+console.log("Task is running in the background.");
+console.log("Awaiting the promise.");
+varvalue=awaitvaluePromise;
+console.log("Promise resolved.");
+assert.equal(42,value);
+console.log(value);
+done();
+})();

Chapter 12/traceur5.out.js

@@ -0,0 +1,56 @@
+functiontimeout(ms){
+returnnewPromise((function(resolve){
+setTimeout(resolve,ms);
+}));
+}
+functionasyncValue(value){
+return$traceurRuntime.asyncWrap(function($ctx){
+while(true)
+switch($ctx.state){
+case0:
+Promise.resolve(timeout(1500)).then($ctx.createCallback(3),$ctx.errback);
+return;
+case3:
+$ctx.returnValue=value;
+$ctx.state=5;
+break;
+case5:
+$ctx.state=-2;
+break;
+default:
+return$ctx.end();
+}
+},this);
+}
+(function(){
+varvaluePromise,
+value;
+return$traceurRuntime.asyncWrap(function($ctx){
+while(true)
+switch($ctx.state){
+case0:
+console.log("Starting.");
+valuePromise=asyncValue(42).catch(console.error.bind(console));
+console.log("Task is running in the background.");
+console.log("Awaiting the promise.");
+$ctx.state=5;
+break;
+case5:
+Promise.resolve(valuePromise).then($ctx.createCallback(2),$ctx.errback);
+return;
+case2:
+value=$ctx.value;
+$ctx.state=3;
+break;
+case3:
+console.log("Promise resolved.");
+assert.equal(42,value);
+console.log(value);
+done();
+$ctx.state=-2;
+break;
+default:
+return$ctx.end();
+}
+},this);
+})();