[Sema] Fix handling of enumerators used as default arguments of lambda

expressions in a function or class template.

This patch makes the following changes:

- Create a DependentScopeDeclRefExpr for the default argument instead of
  a CXXDependentScopeMemberExpr.
- Pass CombineWithOuterScope=true so that the outer scope in which the
  enum is declared is searched for the instantiation of the enum. 

This is the first part of https://reviews.llvm.org/D23096. Fixes PR28795

rdar://problem/27535319


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@289914 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/Sema/SemaTemplateInstantiate.cpp b/lib/Sema/SemaTemplateInstantiate.cpp
index 321fd6995b..4e3862a14d 100644
--- a/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/lib/Sema/SemaTemplateInstantiate.cpp
@@ -1687,7 +1687,7 @@ ParmVarDecl *Sema::SubstParmVarDecl(ParmVarDecl *OldParm,
       // Instantiate default arguments for methods of local classes (DR1484)
       // and non-defining declarations.
       Sema::ContextRAII SavedContext(*this, OwningFunc);
-      LocalInstantiationScope Local(*this);
+      LocalInstantiationScope Local(*this, true);
       ExprResult NewArg = SubstExpr(Arg, TemplateArgs);
       if (NewArg.isUsable()) {
         // It would be nice if we still had this.