PR18044: Reject declarations of enumtype::X early to avoid an assertion in

downstream code.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@195687 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 6d5e0f01268d6d88bc54916be0309869d2114946..8229a6224a2cbdfacac1cde49c73fa49c76e8547 100644 (file)
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -4224,7 +4224,7 @@ NamedDecl *Sema::HandleDeclarator(Scope *S, Declarator &D,
 
     bool EnteringContext = !D.getDeclSpec().isFriendSpecified();
     DC = computeDeclContext(D.getCXXScopeSpec(), EnteringContext);
-    if (!DC) {
+    if (!DC || isa<EnumDecl>(DC)) {
       // If we could not compute the declaration context, it's because the
       // declaration context is dependent but does not refer to a class,
       // class template, or class template partial specialization. Complain

diff --git a/test/SemaCXX/enum-scoped.cpp b/test/SemaCXX/enum-scoped.cpp
index c6869449caa151ca36928f8107ebfadf3fbbbabc..b4aad18b17c939dadc4736f410cf02c065f2d173 100644 (file)
--- a/test/SemaCXX/enum-scoped.cpp
+++ b/test/SemaCXX/enum-scoped.cpp
@@ -282,3 +282,17 @@ namespace rdar15124329 {
   static_assert(T2 == B::T, "");
 }
 
+namespace PR18044 {
+  enum class E { a };
+
+  int E::e = 0; // expected-error {{does not refer into a class}}
+  void E::f() {} // expected-error {{does not refer into a class}}
+  struct E::S {}; // expected-error {{no struct named 'S'}}
+  struct T : E::S {}; // expected-error {{expected class name}}
+  enum E::E {}; // expected-error {{no enum named 'E'}}
+  int E::*p; // expected-error {{does not point into a class}}
+  using E::f; // expected-error {{no member named 'f'}}
+
+  using E::a; // ok!
+  E b = a;
+}