re PR libstdc++/56278 (unordered containers fail static assertion)

	PR libstdc++/56278
	* include/bits/hashtable_policy.h (_Hash_code_base): Make default
	constructor public.
	* testsuite/23_containers/unordered_set/56278.cc: New.

From-SVN: r195935

libstdc++-v3/ChangeLog

+2013-02-10  Jonathan Wakely  <jwakely.gcc@gmail.com>
+
+	PR libstdc++/56278
+	* include/bits/hashtable_policy.h (_Hash_code_base): Make default
+	constructor public.
+	* testsuite/23_containers/unordered_set/56278.cc: New.
+
 2013-02-09  François Dumont  <fdumont@gcc.gnu.org>
 
 	* include/tr1/bessel_function.tcc (__cyl_bessel_ij_series): Code

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

@@ -918,13 +918,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       using __ebo_extract_key = _Hashtable_ebo_helper<0, _ExtractKey>;
       using __ebo_hash = _Hashtable_ebo_helper<1, _Hash>;
 
+    public:
+      // We need the default constructor for the local iterators.
+      _Hash_code_base() = default;
+
     protected:
       typedef void* 					__hash_code;
       typedef _Hash_node<_Value, false>			__node_type;
 
-      // We need the default constructor for the local iterators.
-      _Hash_code_base() = default;
-
+    protected:
       _Hash_code_base(const _ExtractKey& __ex, const _H1&, const _H2&,
 		      const _Hash& __h)
       : __ebo_extract_key(__ex), __ebo_hash(__h) { }
@@ -956,7 +958,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	std::swap(_M_ranged_hash(), __x._M_ranged_hash());
       }
 
-    protected:
       const _ExtractKey&
       _M_extract() const { return __ebo_extract_key::_S_cget(*this); }
 
@@ -1003,13 +1004,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       hash_function() const
       { return _M_h1(); }
 
+      // We need the default constructor for the local iterators.
+      _Hash_code_base() = default;
+
     protected:
       typedef std::size_t 				__hash_code;
       typedef _Hash_node<_Value, false>			__node_type;
 
-      // We need the default constructor for the local iterators.
-      _Hash_code_base() = default;
-
       _Hash_code_base(const _ExtractKey& __ex,
 		      const _H1& __h1, const _H2& __h2,
 		      const _Default_ranged_hash&)

libstdc++-v3/testsuite/23_containers/unordered_set/56278.cc

+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2013 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 even 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/>.
+
+// libstdc++/56278
+
+#include <unordered_set>
+
+struct hash : std::hash<int>
+{
+  hash() { }
+};
+
+std::unordered_set<int, hash>::local_iterator i;