[ASTImporter] Fix import of NestedNameSpecifierLoc.

Summary:
Import type location in case of TypeSpec and TypeSpecWithTemplate.
Without this fix the imported NespedNameSpecifierLoc will have an
invalid begin location.

Reviewers: a.sidorin, shafik, a_sidorin, martong

Reviewed By: a_sidorin

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D55358

llvm-svn: 356151

1 files changed, 20 insertions, 0 deletions

diff --git a/clang/unittests/AST/ASTImporterTest.cpp b/clang/unittests/AST/ASTImporterTest.cpp
index ebab02f5002..ca59bc0c474 100644
--- a/clang/unittests/AST/ASTImporterTest.cpp
+++ b/clang/unittests/AST/ASTImporterTest.cpp
@@ -1232,6 +1232,26 @@ TEST_P(ImportExpr, DependentSizedArrayType) {
           has(fieldDecl(hasType(dependentSizedArrayType())))))));
 }
 
+TEST_P(ASTImporterOptionSpecificTestBase, ImportBeginLocOfDeclRefExpr) {
+  Decl *FromTU = getTuDecl(
+      "class A { public: static int X; }; void f() { (void)A::X; }", Lang_CXX);
+  auto From = FirstDeclMatcher<FunctionDecl>().match(
+      FromTU, functionDecl(hasName("f")));
+  ASSERT_TRUE(From);
+  ASSERT_TRUE(
+      cast<CStyleCastExpr>(cast<CompoundStmt>(From->getBody())->body_front())
+          ->getSubExpr()
+          ->getBeginLoc()
+          .isValid());
+  FunctionDecl *To = Import(From, Lang_CXX);
+  ASSERT_TRUE(To);
+  ASSERT_TRUE(
+      cast<CStyleCastExpr>(cast<CompoundStmt>(To->getBody())->body_front())
+          ->getSubExpr()
+          ->getBeginLoc()
+          .isValid());
+}
+
 TEST_P(ASTImporterOptionSpecificTestBase,
        ImportOfTemplatedDeclOfClassTemplateDecl) {
   Decl *FromTU = getTuDecl("template<class X> struct S{};", Lang_CXX);