[ASTImporter] Import member expr with explicit template args

Summary:
Member expressions with explicit template arguments were not imported
correctly: the DeclRefExpr was missing. This patch fixes.

Reviewers: a_sidorin, shafik, a.sidorin

Subscribers: rnkovacs, dkrupp, Szelethus, gamesh411, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D58830

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@355596 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 50 insertions, 0 deletions

diff --git a/unittests/AST/ASTImporterTest.cpp b/unittests/AST/ASTImporterTest.cpp
index 00e12d75bc..ebab02f500 100644
--- a/unittests/AST/ASTImporterTest.cpp
+++ b/unittests/AST/ASTImporterTest.cpp
@@ -2604,6 +2604,56 @@ TEST_P(ImportFunctions, ImportImplicitFunctionsInLambda) {
   EXPECT_TRUE(LambdaRec->getDestructor());
 }
 
+TEST_P(ImportFunctions,
+       CallExprOfMemberFunctionTemplateWithExplicitTemplateArgs) {
+  Decl *FromTU = getTuDecl(
+      R"(
+      struct X {
+        template <typename T>
+        void foo(){}
+      };
+      void f() {
+        X x;
+        x.foo<int>();
+      }
+      )",
+      Lang_CXX);
+  auto *FromD = FirstDeclMatcher<FunctionDecl>().match(
+      FromTU, functionDecl(hasName("f")));
+  auto *ToD = Import(FromD, Lang_CXX);
+  EXPECT_TRUE(ToD);
+  EXPECT_TRUE(MatchVerifier<FunctionDecl>().match(
+      ToD, functionDecl(hasName("f"), hasDescendant(declRefExpr()))));
+}
+
+TEST_P(ImportFunctions,
+       DependentCallExprOfMemberFunctionTemplateWithExplicitTemplateArgs) {
+  Decl *FromTU = getTuDecl(
+      R"(
+      struct X {
+        template <typename T>
+        void foo(){}
+      };
+      template <typename T>
+      void f() {
+        X x;
+        x.foo<T>();
+      }
+      void g() {
+        f<int>();
+      }
+      )",
+      Lang_CXX);
+  auto *FromD = FirstDeclMatcher<FunctionDecl>().match(
+      FromTU, functionDecl(hasName("g")));
+  auto *ToD = Import(FromD, Lang_CXX);
+  EXPECT_TRUE(ToD);
+  Decl *ToTU = ToAST->getASTContext().getTranslationUnitDecl();
+  EXPECT_TRUE(MatchVerifier<TranslationUnitDecl>().match(
+      ToTU, translationUnitDecl(hasDescendant(
+                functionDecl(hasName("f"), hasDescendant(declRefExpr()))))));
+}
+
 struct ImportFriendFunctions : ImportFunctions {};
 
 TEST_P(ImportFriendFunctions, ImportFriendFunctionRedeclChainProto) {