re PR c++/53067 (c++0x GCC 4.7.0 Regression std::ref with unordered sets)

2012-04-22  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/53067
	* include/bits/hashtable_policy.h: Change inheritances to public.
	* testsuite/23_containers/unordered_map/requirements/53067.cc: New.
	* testsuite/23_containers/unordered_set/requirements/53067.cc: Likewise.

From-SVN: r186676

libstdc++-v3/ChangeLog

+2012-04-22  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR libstdc++/53067
+	* include/bits/hashtable_policy.h: Change inheritances to public.
+	* testsuite/23_containers/unordered_map/requirements/53067.cc: New.
+	* testsuite/23_containers/unordered_set/requirements/53067.cc: Likewise.
+
 2012-04-22  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
 	* include/ext/alloc_traits.h (__alloc_traits::difference_type):

libstdc++-v3/include/bits/hashtable_policy.h

@@ -882,7 +882,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   /// Specialization using EBO.
   template<int _Nm, typename _Tp>
-    struct _Hashtable_ebo_helper<_Nm, _Tp, true> : private _Tp
+    struct _Hashtable_ebo_helper<_Nm, _Tp, true>
+    // See PR53067.
+    : public _Tp
     {
       _Hashtable_ebo_helper() = default;
 
@@ -949,8 +951,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   template<typename _Key, typename _Value, typename _ExtractKey,
 	   typename _H1, typename _H2, typename _Hash>
     struct _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, false>
-    : private _Hashtable_ebo_helper<0, _ExtractKey>,
-      private _Hashtable_ebo_helper<1, _Hash>
+    // See PR53067.
+    : public  _Hashtable_ebo_helper<0, _ExtractKey>,
+      public  _Hashtable_ebo_helper<1, _Hash>
     {
     private:
       typedef _Hashtable_ebo_helper<0, _ExtractKey> 	_EboExtractKey;
@@ -1025,9 +1028,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	   typename _H1, typename _H2>
     struct _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2,
 			   _Default_ranged_hash, false>
-    : private _Hashtable_ebo_helper<0, _ExtractKey>,
-      private _Hashtable_ebo_helper<1, _H1>,
-      private _Hashtable_ebo_helper<2, _H2>
+    // See PR53067.
+    : public  _Hashtable_ebo_helper<0, _ExtractKey>,
+      public  _Hashtable_ebo_helper<1, _H1>,
+      public  _Hashtable_ebo_helper<2, _H2>
     {
     private:
       typedef _Hashtable_ebo_helper<0, _ExtractKey> 	_EboExtractKey;
@@ -1108,9 +1112,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	   typename _H1, typename _H2>
     struct _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2,
 			   _Default_ranged_hash, true>
-    : private _Hashtable_ebo_helper<0, _ExtractKey>,
-      private _Hashtable_ebo_helper<1, _H1>,
-      private _Hashtable_ebo_helper<2, _H2>
+    // See PR53067.
+    : public  _Hashtable_ebo_helper<0, _ExtractKey>,
+      public  _Hashtable_ebo_helper<1, _H1>,
+      public  _Hashtable_ebo_helper<2, _H2>
     {
     private:
       typedef _Hashtable_ebo_helper<0, _ExtractKey>	_EboExtractKey;
@@ -1229,7 +1234,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	   typename _H1, typename _H2, typename _Hash>
     struct _Local_iterator_base<_Key, _Value, _ExtractKey,
 				_H1, _H2, _Hash, true>
-      : private _H2
+    // See PR53067.
+    : public _H2
     {
       _Local_iterator_base() = default;
       _Local_iterator_base(_Hash_node<_Value, true>* __p,
@@ -1261,8 +1267,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	   typename _H1, typename _H2, typename _Hash>
     struct _Local_iterator_base<_Key, _Value, _ExtractKey,
 				_H1, _H2, _Hash, false>
-      : private _Hash_code_base<_Key, _Value, _ExtractKey,
-				_H1, _H2, _Hash, false>
+    // See PR53067.
+    : public _Hash_code_base<_Key, _Value, _ExtractKey,
+			     _H1, _H2, _Hash, false>
     {
       _Local_iterator_base() = default;
       _Local_iterator_base(_Hash_node<_Value, false>* __p,
@@ -1421,9 +1428,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	   typename _ExtractKey, typename _Equal,
 	   typename _H1, typename _H2, typename _Hash, typename _Traits>
   struct _Hashtable_base
+  // See PR53067.
   : public  _Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash,
-			    _Traits::__hash_cached::value>,
-    private _Hashtable_ebo_helper<0, _Equal>
+			      _Traits::__hash_cached::value>,
+    public _Hashtable_ebo_helper<0, _Equal>
   {
   public:
     typedef _Key                                    key_type;

libstdc++-v3/testsuite/23_containers/unordered_map/requirements/53067.cc

+// { dg-do compile }
+// { dg-options "-std=gnu++11" }
+
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without Pred the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <unordered_map>
+#include <functional>
+
+void f()
+{
+  std::unordered_map<int, int> Foo;
+  ref(Foo);
+}

libstdc++-v3/testsuite/23_containers/unordered_set/requirements/53067.cc

+// { dg-do compile }
+// { dg-options "-std=gnu++11" }
+
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without Pred the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <unordered_set>
+#include <functional>
+
+void f()
+{
+  std::unordered_set<int> Foo;
+  ref(Foo);
+}