From e087992134c164cfd665646a655688bf5a824f0f Mon Sep 17 00:00:00 2001
From: Oleksandr T <oleksandr.tarasiuk@outlook.com>
Date: Fri, 9 Dec 2022 03:10:00 +0200
Subject: [PATCH] feat(47977): show completion in jsdoc extends/implements tags
 (#51028)

---
 src/services/completions.ts                           | 8 +++++++-
 tests/cases/fourslash/jsdocExtendsTagCompletion.ts    | 8 ++++++++
 tests/cases/fourslash/jsdocImplementsTagCompletion.ts | 8 ++++++++
 3 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/jsdocExtendsTagCompletion.ts
 create mode 100644 tests/cases/fourslash/jsdocImplementsTagCompletion.ts

diff --git a/src/services/completions.ts b/src/services/completions.ts
index 68ed11c1c26..210524b95dd 100644
--- a/src/services/completions.ts
+++ b/src/services/completions.ts
@@ -56,6 +56,7 @@ import {
     every,
     ExportKind,
     Expression,
+    ExpressionWithTypeArguments,
     factory,
     filter,
     find,
@@ -167,6 +168,8 @@ import {
     isInString,
     isIntersectionTypeNode,
     isJSDoc,
+    isJSDocAugmentsTag,
+    isJSDocImplementsTag,
     isJSDocParameterTag,
     isJSDocTag,
     isJSDocTemplateTag,
@@ -2967,11 +2970,14 @@ function getCompletionData(
         }
     }
 
-    function tryGetTypeExpressionFromTag(tag: JSDocTag): JSDocTypeExpression | undefined {
+    function tryGetTypeExpressionFromTag(tag: JSDocTag): JSDocTypeExpression | ExpressionWithTypeArguments | undefined {
         if (isTagWithTypeExpression(tag)) {
             const typeExpression = isJSDocTemplateTag(tag) ? tag.constraint : tag.typeExpression;
             return typeExpression && typeExpression.kind === SyntaxKind.JSDocTypeExpression ? typeExpression : undefined;
         }
+        if (isJSDocAugmentsTag(tag) || isJSDocImplementsTag(tag)) {
+            return tag.class;
+        }
         return undefined;
     }
 
diff --git a/tests/cases/fourslash/jsdocExtendsTagCompletion.ts b/tests/cases/fourslash/jsdocExtendsTagCompletion.ts
new file mode 100644
index 00000000000..1af4d0e24cf
--- /dev/null
+++ b/tests/cases/fourslash/jsdocExtendsTagCompletion.ts
@@ -0,0 +1,8 @@
+///<reference path="fourslash.ts" />
+
+/////** @extends {/**/} */
+////class A {}
+
+verify.completions(
+    { marker: "", exact: completion.globalTypesPlus(["A"]) },
+);
diff --git a/tests/cases/fourslash/jsdocImplementsTagCompletion.ts b/tests/cases/fourslash/jsdocImplementsTagCompletion.ts
new file mode 100644
index 00000000000..4407dfb3177
--- /dev/null
+++ b/tests/cases/fourslash/jsdocImplementsTagCompletion.ts
@@ -0,0 +1,8 @@
+///<reference path="fourslash.ts" />
+
+/////** @implements {/**/} */
+////class A {}
+
+verify.completions(
+    { marker: "", exact: completion.globalTypesPlus(["A"]) },
+);