Emit leading comments for '}' of the constructor block

Fixes #503

Author: sheetalkamat

src/compiler/emitter.ts

@@ -1652,8 +1652,11 @@ module ts {
                         if (superCall) statements = statements.slice(1);
                         emitLines(statements);
                     }
-                    decreaseIndent();
                     writeLine();
+                    if (ctor) {
+                        emitLeadingCommentsOfPosition((<Block>ctor.body).statements.end);
+                    }
+                    decreaseIndent();
                     emitToken(SyntaxKind.CloseBraceToken, ctor ? (<Block>ctor.body).statements.end : node.members.end);
                     scopeEmitEnd();
                     emitEnd(<Node>ctor || node);

tests/baselines/reference/callOverloads1.js

@@ -20,6 +20,7 @@ Foo();
 //// [callOverloads1.js]
 var Foo = (function () {
     function Foo(x) {
+        // WScript.Echo("Constructor function has executed");
     }
     Foo.prototype.bar1 = function () {
     };

tests/baselines/reference/callOverloads2.js

@@ -28,6 +28,7 @@ Foo();
 //// [callOverloads2.js]
 var Foo = (function () {
     function Foo(x) {
+        // WScript.Echo("Constructor function has executed");
     }
     Foo.prototype.bar1 = function () {
     };

tests/baselines/reference/callOverloads3.js

@@ -21,6 +21,7 @@ Foo("s");
 //// [callOverloads3.js]
 var Foo = (function () {
     function Foo(x) {
+        // WScript.Echo("Constructor function has executed");
     }
     Foo.prototype.bar1 = function () {
     };

tests/baselines/reference/callOverloads4.js

@@ -21,6 +21,7 @@ Foo("s");
 //// [callOverloads4.js]
 var Foo = (function () {
     function Foo(x) {
+        // WScript.Echo("Constructor function has executed");
     }
     Foo.prototype.bar1 = function () {
     };

tests/baselines/reference/callOverloads5.js

@@ -22,6 +22,7 @@ Foo("s");
 //// [callOverloads5.js]
 var Foo = (function () {
     function Foo(x) {
+        // WScript.Echo("Constructor function has executed");
     }
     Foo.prototype.bar1 = function (a) {
     };

tests/baselines/reference/commentsClass.js

@@ -63,6 +63,14 @@ class c8 {
 }
 var i8 = new c8();
 var i8_c = c8;
+
+class c9 {
+    constructor() {
+        /// This is some detached comment
+
+        // should emit this leading comment of } too
+    }
+}
 
 
 //// [commentsClass.js]
@@ -123,11 +131,20 @@ var c8 = (function () {
     /** constructor comment
     */
     function c8() {
+        /** constructor comment2
+        */
     }
     return c8;
 })();
 var i8 = new c8();
 var i8_c = c8;
+var c9 = (function () {
+    function c9() {
+        /// This is some detached comment
+        // should emit this leading comment of } too
+    }
+    return c9;
+})();
 
 
 //// [commentsClass.d.ts]
@@ -178,3 +195,6 @@ declare class c8 {
 }
 declare var i8: c8;
 declare var i8_c: typeof c8;
+declare class c9 {
+    constructor();
+}

tests/baselines/reference/commentsClass.types

@@ -130,3 +130,13 @@ var i8_c = c8;
 >i8_c : typeof c8
 >c8 : typeof c8
 
+class c9 {
+>c9 : c9
+
+    constructor() {
+        /// This is some detached comment
+
+        // should emit this leading comment of } too
+    }
+}
+

tests/cases/compiler/commentsClass.ts

@@ -65,3 +65,11 @@ class c8 {
 }
 var i8 = new c8();
 var i8_c = c8;
+
+class c9 {
+    constructor() {
+        /// This is some detached comment
+
+        // should emit this leading comment of } too
+    }
+}