[clang] 59f1bf4 - [ASTImporter] Add unittest case for friend decl import

[via cfe-commits]

Author: Vince Bridgers
Date: 2020-07-02T09:26:34-05:00
New Revision: 59f1bf46f8c258b9c784ff921b89fb6cb7a06612

URL: https://github.com/llvm/llvm-project/commit/59f1bf46f8c258b9c784ff921b89fb6cb7a06612
DIFF: https://github.com/llvm/llvm-project/commit/59f1bf46f8c258b9c784ff921b89fb6cb7a06612.diff

LOG: [ASTImporter] Add unittest case for friend decl import

Summary:
This change adds a matching test case for the recent bug fix to
VisitFriendDecl in ASTImporterLookup.cpp.

See https://reviews.llvm.org/D82882 for details.

Reviewers: martong, a.sidorin, shafik

Reviewed By: martong

Subscribers: rnkovacs, teemperor, cfe-commits, dkrupp

Tags: #clang

Differential Revision: https://reviews.llvm.org/D83006

Added: 
    

Modified: 
    clang/unittests/AST/ASTImporterTest.cpp

Removed: 
    


################################################################################
diff  --git a/clang/unittests/AST/ASTImporterTest.cpp b/clang/unittests/AST/ASTImporterTest.cpp
index 172fbb461a7e..d6a5afeeb489 100644
--- a/clang/unittests/AST/ASTImporterTest.cpp
+++ b/clang/unittests/AST/ASTImporterTest.cpp
@@ -3416,6 +3416,26 @@ TEST_P(ASTImporterOptionSpecificTestBase,
   EXPECT_TRUE(ToCtor->hasBody());
 }
 
+TEST_P(ASTImporterOptionSpecificTestBase, ClassTemplateFriendDecl) {
+  const auto *Code =
+      R"(
+      template <class T> class X {  friend T; };
+      struct Y {};
+      template class X<Y>;
+    )";
+  Decl *ToTU = getToTuDecl(Code, Lang_CXX11);
+  Decl *FromTU = getTuDecl(Code, Lang_CXX11);
+  auto *FromSpec = FirstDeclMatcher<ClassTemplateSpecializationDecl>().match(
+      FromTU, classTemplateSpecializationDecl());
+  auto *ToSpec = FirstDeclMatcher<ClassTemplateSpecializationDecl>().match(
+      ToTU, classTemplateSpecializationDecl());
+
+  auto *ImportedSpec = Import(FromSpec, Lang_CXX11);
+  EXPECT_EQ(ImportedSpec, ToSpec);
+  EXPECT_EQ(1u, DeclCounter<ClassTemplateSpecializationDecl>().match(
+                    ToTU, classTemplateSpecializationDecl()));
+}
+
 TEST_P(ASTImporterOptionSpecificTestBase,
        ClassTemplatePartialSpecializationsShouldNotBeDuplicated) {
   auto Code =