Merge pull request #16631 from Microsoft/fix13721

Emit class annotation comment on downlevel classes

Author: DanielRosenwasser

src/compiler/transformers/es2015.ts

@@ -840,7 +840,7 @@ namespace ts {
             outer.end = skipTrivia(currentText, node.pos);
             setEmitFlags(outer, EmitFlags.NoComments);
 
-            return createParen(
+            const result = createParen(
                 createCall(
                     outer,
                     /*typeArguments*/ undefined,
@@ -849,6 +849,8 @@ namespace ts {
                         : []
                 )
             );
+            addSyntheticLeadingComment(result, SyntaxKind.MultiLineCommentTrivia, "* @class ");
+            return result;
         }
 
         /**

tests/baselines/reference/2dArrays.js

@@ -16,17 +16,17 @@ class Board {
 }
 
 //// [2dArrays.js]
-var Cell = (function () {
+var Cell = /** @class */ (function () {
     function Cell() {
     }
     return Cell;
 }());
-var Ship = (function () {
+var Ship = /** @class */ (function () {
     function Ship() {
     }
     return Ship;
 }());
-var Board = (function () {
+var Board = /** @class */ (function () {
     function Board() {
     }
     Board.prototype.allShipsSunk = function () {

tests/baselines/reference/AmbientModuleAndNonAmbientClassWithSameNameAndCommonRoot.js

@@ -25,7 +25,7 @@ var p = new A.Point(0, 0); // unexpected error here, bug 840000
 //// [classPoint.js]
 var A;
 (function (A) {
-    var Point = (function () {
+    var Point = /** @class */ (function () {
         function Point(x, y) {
             this.x = x;
             this.y = y;

tests/baselines/reference/ClassAndModuleThatMergeWithModuleMemberThatUsesClassTypeParameter.js

@@ -51,42 +51,42 @@ module clodule4 {
 
 //// [ClassAndModuleThatMergeWithModuleMemberThatUsesClassTypeParameter.js]
 // all expected to be errors
-var clodule1 = (function () {
+var clodule1 = /** @class */ (function () {
     function clodule1() {
     }
     return clodule1;
 }());
 (function (clodule1) {
     function f(x) { }
 })(clodule1 || (clodule1 = {}));
-var clodule2 = (function () {
+var clodule2 = /** @class */ (function () {
     function clodule2() {
     }
     return clodule2;
 }());
 (function (clodule2) {
     var x;
-    var D = (function () {
+    var D = /** @class */ (function () {
         function D() {
         }
         return D;
     }());
 })(clodule2 || (clodule2 = {}));
-var clodule3 = (function () {
+var clodule3 = /** @class */ (function () {
     function clodule3() {
     }
     return clodule3;
 }());
 (function (clodule3) {
     clodule3.y = { id: T };
 })(clodule3 || (clodule3 = {}));
-var clodule4 = (function () {
+var clodule4 = /** @class */ (function () {
     function clodule4() {
     }
     return clodule4;
 }());
 (function (clodule4) {
-    var D = (function () {
+    var D = /** @class */ (function () {
         function D() {
         }
         return D;

tests/baselines/reference/ClassAndModuleThatMergeWithModulesExportedGenericFunctionAndGenericClassStaticFunctionOfTheSameName.js

@@ -16,7 +16,7 @@ module clodule {
 
 
 //// [ClassAndModuleThatMergeWithModulesExportedGenericFunctionAndGenericClassStaticFunctionOfTheSameName.js]
-var clodule = (function () {
+var clodule = /** @class */ (function () {
     function clodule() {
     }
     clodule.fn = function (id) { };

tests/baselines/reference/ClassAndModuleThatMergeWithModulesExportedGenericFunctionAndNonGenericClassStaticFunctionOfTheSameName.js

@@ -16,7 +16,7 @@ module clodule {
 
 
 //// [ClassAndModuleThatMergeWithModulesExportedGenericFunctionAndNonGenericClassStaticFunctionOfTheSameName.js]
-var clodule = (function () {
+var clodule = /** @class */ (function () {
     function clodule() {
     }
     clodule.fn = function (id) { };

tests/baselines/reference/ClassAndModuleThatMergeWithModulesExportedStaticFunctionUsingClassPrivateStatics.js

@@ -16,7 +16,7 @@ module clodule {
 
 
 //// [ClassAndModuleThatMergeWithModulesExportedStaticFunctionUsingClassPrivateStatics.js]
-var clodule = (function () {
+var clodule = /** @class */ (function () {
     function clodule() {
     }
     clodule.sfn = function (id) { return 42; };

tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.js

@@ -23,7 +23,7 @@ module A {
 }
 
 //// [ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.js]
-var Point = (function () {
+var Point = /** @class */ (function () {
     function Point(x, y) {
         this.x = x;
         this.y = y;
@@ -37,7 +37,7 @@ var Point = (function () {
 })(Point || (Point = {}));
 var A;
 (function (A) {
-    var Point = (function () {
+    var Point = /** @class */ (function () {
         function Point(x, y) {
             this.x = x;
             this.y = y;

tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.js

@@ -23,7 +23,7 @@ module A {
 }
 
 //// [ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.js]
-var Point = (function () {
+var Point = /** @class */ (function () {
     function Point(x, y) {
         this.x = x;
         this.y = y;
@@ -36,7 +36,7 @@ var Point = (function () {
 })(Point || (Point = {}));
 var A;
 (function (A) {
-    var Point = (function () {
+    var Point = /** @class */ (function () {
         function Point(x, y) {
             this.x = x;
             this.y = y;

tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.js

@@ -23,7 +23,7 @@ module A {
 }
 
 //// [ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.js]
-var Point = (function () {
+var Point = /** @class */ (function () {
     function Point(x, y) {
         this.x = x;
         this.y = y;
@@ -36,7 +36,7 @@ var Point = (function () {
 })(Point || (Point = {}));
 var A;
 (function (A) {
-    var Point = (function () {
+    var Point = /** @class */ (function () {
         function Point(x, y) {
             this.x = x;
             this.y = y;