Fix bug: Ignore @enum tag in TS (#27076)

Author: Andy

src/compiler/binder.ts

@@ -2666,7 +2666,7 @@ namespace ts {
             }
 
             if (!isBindingPattern(node.name)) {
-                const isEnum = !!getJSDocEnumTag(node);
+                const isEnum = isInJSFile(node) && !!getJSDocEnumTag(node);
                 const enumFlags = (isEnum ? SymbolFlags.RegularEnum : SymbolFlags.None);
                 const enumExcludes = (isEnum ? SymbolFlags.RegularEnumExcludes : SymbolFlags.None);
                 if (isBlockOrCatchScoped(node)) {

tests/baselines/reference/jsdocInTypeScript.errors.txt

@@ -67,4 +67,8 @@ tests/cases/compiler/jsdocInTypeScript.ts(42,12): error TS2503: Cannot find name
      * @type {{foo: (function(string, string): string)}}
      */
     const obj = { foo: (a, b) => a + b };
+    
+    /** @enum {string} */
+    var E = {};
+    E[""];
 

tests/baselines/reference/jsdocInTypeScript.js

@@ -47,6 +47,10 @@ import M = N; // Error: @typedef does not create namespaces in TypeScript code.
  * @type {{foo: (function(string, string): string)}}
  */
 const obj = { foo: (a, b) => a + b };
+
+/** @enum {string} */
+var E = {};
+E[""];
 
 
 //// [jsdocInTypeScript.js]
@@ -79,3 +83,6 @@ var M = N; // Error: @typedef does not create namespaces in TypeScript code.
  * @type {{foo: (function(string, string): string)}}
  */
 var obj = { foo: function (a, b) { return a + b; } };
+/** @enum {string} */
+var E = {};
+E[""];

tests/baselines/reference/jsdocInTypeScript.symbols

@@ -83,3 +83,10 @@ const obj = { foo: (a, b) => a + b };
 >a : Symbol(a, Decl(jsdocInTypeScript.ts, 47, 20))
 >b : Symbol(b, Decl(jsdocInTypeScript.ts, 47, 22))
 
+/** @enum {string} */
+var E = {};
+>E : Symbol(E, Decl(jsdocInTypeScript.ts, 50, 3))
+
+E[""];
+>E : Symbol(E, Decl(jsdocInTypeScript.ts, 50, 3))
+

tests/baselines/reference/jsdocInTypeScript.types

@@ -93,3 +93,13 @@ const obj = { foo: (a, b) => a + b };
 >a : any
 >b : any
 
+/** @enum {string} */
+var E = {};
+>E : {}
+>{} : {}
+
+E[""];
+>E[""] : any
+>E : {}
+>"" : ""
+

tests/cases/compiler/jsdocInTypeScript.ts

@@ -46,3 +46,7 @@ import M = N; // Error: @typedef does not create namespaces in TypeScript code.
  * @type {{foo: (function(string, string): string)}}
  */
 const obj = { foo: (a, b) => a + b };
+
+/** @enum {string} */
+var E = {};
+E[""];