In C++11 an enum can be used in a nested-name-specifier, but it still
isn't valid for a pointer-to-member.
Tested x86_64-pc-linux-gnu, applying to trunk.
commit 80c46fcfb6ea29a6566b285cf94e519ec414d2e9
Author: Jason Merrill <ja...@redhat.com>
Date: Sat Dec 17 15:39:56 2011 -0500
PR c++/51588
* parser.c (cp_parser_ptr_operator): Reject pointer to member of enum.
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index ac7427e..51d04d4 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -16448,6 +16448,9 @@ cp_parser_ptr_operator (cp_parser* parser,
if (TREE_CODE (parser->scope) == NAMESPACE_DECL)
error_at (token->location, "%qD is a namespace", parser->scope);
+ else if (TREE_CODE (parser->scope) == ENUMERAL_TYPE)
+ error_at (token->location, "cannot form pointer to member of "
+ "non-class %q#T", parser->scope);
else
{
/* The type of which the member is a member is given by the
diff --git a/gcc/testsuite/g++.dg/parse/enum7.C b/gcc/testsuite/g++.dg/parse/enum7.C
new file mode 100644
index 0000000..d9e3a89
--- /dev/null
+++ b/gcc/testsuite/g++.dg/parse/enum7.C
@@ -0,0 +1,9 @@
+// PR c++/51588
+
+enum A {};
+
+struct B : A { // { dg-error "" }
+ int i;
+};
+
+int A::* p = &B::i; // { dg-error "" }
