[PATCH] D57901: [ASTImporter] Add test RedeclChainShouldBeCorrectAmongstNamespaces

[Gabor Marton via Phabricator via cfe-commits]

martong created this revision.
martong added reviewers: a_sidorin, shafik.
Herald added subscribers: cfe-commits, gamesh411, Szelethus, dkrupp, rnkovacs.
Herald added a reviewer: a.sidorin.
Herald added a project: clang.

We add a new test to show that redecl chains are not handled properly
amongst namespaces. We cannot pass this test now, so this is disabled.
Subsequent patches will make this test pass.


Repository:
  rC Clang

https://reviews.llvm.org/D57901

Files:
  unittests/AST/ASTImporterTest.cpp


Index: unittests/AST/ASTImporterTest.cpp
===================================================================
--- unittests/AST/ASTImporterTest.cpp
+++ unittests/AST/ASTImporterTest.cpp
@@ -5083,6 +5083,47 @@
     ParameterizedTests, CanonicalRedeclChain,
     ::testing::Values(ArgVector()),);
 
+// FIXME This test is disabled currently, upcoming patches will make it
+// possible to enable.
+TEST_P(ASTImporterOptionSpecificTestBase,
+       DISABLED_RedeclChainShouldBeCorrectAmongstNamespaces) {
+  Decl *FromTU = getTuDecl(
+      R"(
+      namespace NS {
+        struct X;
+        struct Y {
+          static const int I = 3;
+        };
+      }
+      namespace NS {
+        struct X {  // <--- To be imported
+          void method(int i = Y::I) {}
+          int f;
+        };
+      }
+      )",
+      Lang_CXX);
+  auto *FromFwd = FirstDeclMatcher<CXXRecordDecl>().match(
+      FromTU, cxxRecordDecl(hasName("X"), unless(isImplicit())));
+  auto *FromDef = LastDeclMatcher<CXXRecordDecl>().match(
+      FromTU,
+      cxxRecordDecl(hasName("X"), isDefinition(), unless(isImplicit())));
+  ASSERT_NE(FromFwd, FromDef);
+  ASSERT_FALSE(FromFwd->isThisDeclarationADefinition());
+  ASSERT_TRUE(FromDef->isThisDeclarationADefinition());
+  ASSERT_EQ(FromFwd->getCanonicalDecl(), FromDef->getCanonicalDecl());
+
+  auto *ToDef = cast_or_null<CXXRecordDecl>(Import(FromDef, Lang_CXX));
+  auto *ToFwd = cast_or_null<CXXRecordDecl>(Import(FromFwd, Lang_CXX));
+  EXPECT_NE(ToFwd, ToDef);
+  EXPECT_FALSE(ToFwd->isThisDeclarationADefinition());
+  EXPECT_TRUE(ToDef->isThisDeclarationADefinition());
+  EXPECT_EQ(ToFwd->getCanonicalDecl(), ToDef->getCanonicalDecl());
+  auto *ToTU = ToAST->getASTContext().getTranslationUnitDecl();
+  // We expect no (ODR) warning during the import.
+  EXPECT_EQ(0u, ToTU->getASTContext().getDiagnostics().getNumWarnings());
+}
+
 INSTANTIATE_TEST_CASE_P(ParameterizedTests, ASTImporterLookupTableTest,
                         DefaultTestValuesForRunOptions, );
 


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