[modules] Suport for merging a parsed enum definition into an existing imported but not visible definition.

llvm-svn: 236690

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaLookup.cpp b/clang/lib/Sema/SemaLookup.cpp
index 09424a48d63..012c1cf3927 100644
--- a/clang/lib/Sema/SemaLookup.cpp
+++ b/clang/lib/Sema/SemaLookup.cpp
@@ -13,6 +13,7 @@
 //===----------------------------------------------------------------------===//
 #include "clang/Sema/Lookup.h"
 #include "clang/AST/ASTContext.h"
+#include "clang/AST/ASTMutationListener.h"
 #include "clang/AST/CXXInheritance.h"
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclCXX.h"
@@ -1169,6 +1170,12 @@ static Decl *getInstantiatedFrom(Decl *D, MemberSpecializationInfo *MSInfo) {
   return MSInfo->isExplicitSpecialization() ? D : MSInfo->getInstantiatedFrom();
 }
 
+void Sema::makeMergedDefinitionVisible(NamedDecl *ND, SourceLocation Loc) {
+  if (auto *Listener = getASTMutationListener())
+    Listener->RedefinedHiddenDefinition(ND, Loc);
+  ND->setHidden(false);
+}
+
 /// \brief Find the module in which the given declaration was defined.
 static Module *getDefiningModule(Decl *Entity) {
   if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Entity)) {