fix(55650): show quick info in JSDoc @implements tag

src/compiler/utilities.ts

@@ -282,6 +282,7 @@ import {
     isJSDoc,
     isJSDocAugmentsTag,
     isJSDocFunctionType,
+    isJSDocImplementsTag,
     isJSDocLinkLike,
     isJSDocMemberName,
     isJSDocNameReference,
@@ -2452,7 +2453,7 @@ export function isPartOfTypeNode(node: Node): boolean {
         case SyntaxKind.VoidKeyword:
             return node.parent.kind !== SyntaxKind.VoidExpression;
         case SyntaxKind.ExpressionWithTypeArguments:
-            return isHeritageClause(node.parent) && !isExpressionWithTypeArgumentsInClassExtendsClause(node);
+            return isPartOfTypeExpressionWithTypeArguments(node);
         case SyntaxKind.TypeParameter:
             return node.parent.kind === SyntaxKind.MappedType || node.parent.kind === SyntaxKind.InferType;
 
@@ -2491,7 +2492,7 @@ export function isPartOfTypeNode(node: Node): boolean {
             }
             switch (parent.kind) {
                 case SyntaxKind.ExpressionWithTypeArguments:
-                    return isHeritageClause(parent.parent) && !isExpressionWithTypeArgumentsInClassExtendsClause(parent);
+                    return isPartOfTypeExpressionWithTypeArguments(parent);
                 case SyntaxKind.TypeParameter:
                     return node === (parent as TypeParameterDeclaration).constraint;
                 case SyntaxKind.JSDocTemplateTag:
@@ -2527,6 +2528,12 @@ export function isPartOfTypeNode(node: Node): boolean {
     return false;
 }
 
+function isPartOfTypeExpressionWithTypeArguments(node: Node) {
+    return isJSDocImplementsTag(node.parent)
+        || isJSDocAugmentsTag(node.parent)
+        || isHeritageClause(node.parent) && !isExpressionWithTypeArgumentsInClassExtendsClause(node);
+}
+
 /** @internal */
 export function isChildOfNodeWithKind(node: Node, kind: SyntaxKind): boolean {
     while (node) {

tests/baselines/reference/quickInfoJsDocTags15.baseline

@@ -0,0 +1,106 @@
+// === QuickInfo ===
+=== /b.js ===
+// import * as _a from "./a.js";
+// /**
+//  * @implements {_a.Foo}
+//                    ^^^
+// | ----------------------------------------------------------------------
+// | type Foo = {
+// |     getName: _a.Bar;
+// | }
+// | ----------------------------------------------------------------------
+//  */
+// class Foo { }
+
+[
+  {
+    "marker": {
+      "fileName": "/b.js",
+      "position": 56,
+      "name": "2"
+    },
+    "item": {
+      "kind": "type",
+      "kindModifiers": "",
+      "textSpan": {
+        "start": 53,
+        "length": 3
+      },
+      "displayParts": [
+        {
+          "text": "type",
+          "kind": "keyword"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "Foo",
+          "kind": "aliasName"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "=",
+          "kind": "operator"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "{",
+          "kind": "punctuation"
+        },
+        {
+          "text": "\n",
+          "kind": "lineBreak"
+        },
+        {
+          "text": "    ",
+          "kind": "space"
+        },
+        {
+          "text": "getName",
+          "kind": "propertyName"
+        },
+        {
+          "text": ":",
+          "kind": "punctuation"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "_a",
+          "kind": "aliasName"
+        },
+        {
+          "text": ".",
+          "kind": "punctuation"
+        },
+        {
+          "text": "Bar",
+          "kind": "aliasName"
+        },
+        {
+          "text": ";",
+          "kind": "punctuation"
+        },
+        {
+          "text": "\n",
+          "kind": "lineBreak"
+        },
+        {
+          "text": "}",
+          "kind": "punctuation"
+        }
+      ],
+      "documentation": []
+    }
+  }
+]

tests/cases/fourslash/quickInfoJsDocTags15.ts

@@ -0,0 +1,26 @@
+/// <reference path="fourslash.ts" />
+
+// @allowJs: true
+// @checkJs: true
+// @filename: /a.js
+/////**
+//// * @callback Bar
+//// * @param {string} name
+//// * @returns {string}
+//// */
+////
+/////**
+//// * @typedef Foo
+//// * @property {Bar} getName
+//// */
+////export const foo = 1;
+
+// @filename: /b.js
+////import * as _a from "./a.js";
+/////**
+//// * @implements {_a.Foo/*2*/}
+//// */
+////class Foo { }
+
+goTo.file("/b.js")
+verify.baselineQuickInfo();