extension type support for deprecated_member_use_from_same_package

Fixes: https://github.com/dart-lang/linter/issues/4715

Change-Id: I8584facf340c7818d539b9182ebb50c12484114e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/322580
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Phil Quitslund <pquitslund@google.com>

pkg/linter/lib/src/rules/deprecated_member_use_from_same_package.dart

@@ -275,6 +275,18 @@ class _RecursiveVisitor extends RecursiveAstVisitor<void> {
     super.visitExtensionOverride(node);
   }
 
+  @override
+  void visitExtensionTypeDeclaration(ExtensionTypeDeclaration node) {
+    _deprecatedVerifier
+        .pushInDeprecatedValue(node.declaredElement?.hasDeprecated ?? false);
+
+    try {
+      super.visitExtensionTypeDeclaration(node);
+    } finally {
+      _deprecatedVerifier.popInDeprecated();
+    }
+  }
+
   @override
   void visitFieldDeclaration(FieldDeclaration node) {
     _deprecatedVerifier.pushInDeprecatedMetadata(node.metadata);

pkg/linter/test/rules/deprecated_member_use_from_same_package_test.dart

@@ -110,6 +110,16 @@ extension E on C {}
 ''');
   }
 
+  test_deprecatedClass_usedInDeprecatedExtensionTypeRepresentation() async {
+    await assertNoDiagnostics(r'''
+@deprecated
+class C {}
+
+@deprecated
+extension type E(C c) { }
+''');
+  }
+
   test_deprecatedClass_usedInDeprecatedField_initializer() async {
     await assertNoDiagnostics(r'''
 @deprecated
@@ -208,6 +218,17 @@ C? x;
 ''');
   }
 
+  test_deprecatedClass_usedInExtensionTypeRepresentation() async {
+    await assertDiagnostics(r'''
+@deprecated
+class C {}
+
+extension type E(C c) { }
+''', [
+      lint(41, 1),
+    ]);
+  }
+
   test_deprecatedClass_usedInFieldFormalParameter() async {
     await assertDiagnostics(r'''
 @deprecated
@@ -364,6 +385,52 @@ var x = E(0).f();
     ]);
   }
 
+  test_deprecatedExtensionType_usedInExtensionTypeImplements() async {
+    await assertDiagnostics(r'''
+@deprecated
+extension type E(int i) { }
+
+extension type F(int i) implements E { }
+''', [
+      lint(76, 1),
+    ]);
+  }
+
+  test_deprecatedExtensionType_usedInExtensionTypeRepresentation() async {
+    await assertDiagnostics(r'''
+@deprecated
+extension type E(int i) { }
+
+extension type F(E c) { }
+''', [
+      lint(58, 1),
+    ]);
+  }
+
+  test_deprecatedExtensionType_usedInField() async {
+    await assertDiagnostics(r'''
+@deprecated
+extension type E(int i) { }
+
+class C {
+  E? e;
+}
+''', [
+      lint(53, 1),
+    ]);
+  }
+
+  test_deprecatedExtensionType_usedInFunctionParam() async {
+    await assertDiagnostics(r'''
+@deprecated
+extension type E(int i) { }
+
+void f(E e) { }
+''', [
+      lint(48, 1),
+    ]);
+  }
+
   test_deprecatedField_usedAsGetter() async {
     await assertDiagnostics(r'''
 class A {