[v3] libstdc++/42925

Index: include/bits/unique_ptr.h
===================================================================
--- include/bits/unique_ptr.h	(revision 163092)
+++ include/bits/unique_ptr.h	(working copy)
@@ -101,7 +101,7 @@ 
     public:
       typedef typename _Pointer::type	pointer;
       typedef _Tp                       element_type;
-      typedef _Dp               deleter_type;
+      typedef _Dp                       deleter_type;
 
       // Constructors.
       unique_ptr()
@@ -432,6 +432,16 @@ 
 	       const unique_ptr<_Up, _Ep>& __y)
     { return __x.get() == __y.get(); }
 
+  template<typename _Tp, typename _Dp>
+    inline bool
+    operator==(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
+    { return __x.get() == nullptr; }
+
+  template<typename _Tp, typename _Dp>
+    inline bool
+    operator==(nullptr_t, const unique_ptr<_Tp, _Dp>& __y)
+    { return nullptr == __y.get(); }
+
   template<typename _Tp, typename _Dp,
 	   typename _Up, typename _Ep>
     inline bool
@@ -439,6 +449,16 @@ 
 	       const unique_ptr<_Up, _Ep>& __y)
     { return !(__x.get() == __y.get()); }
 
+  template<typename _Tp, typename _Dp>
+    inline bool
+    operator!=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
+    { return __x.get() != nullptr; }
+
+  template<typename _Tp, typename _Dp>
+    inline bool
+    operator!=(nullptr_t, const unique_ptr<_Tp, _Dp>& __y)
+    { return nullptr != __y.get(); }
+
   template<typename _Tp, typename _Dp,
 	   typename _Up, typename _Ep>
     inline bool
Index: include/bits/shared_ptr_base.h
===================================================================
--- include/bits/shared_ptr_base.h	(revision 163091)
+++ include/bits/shared_ptr_base.h	(working copy)
@@ -851,12 +851,32 @@ 
 	       const __shared_ptr<_Tp2, _Lp>& __b)
     { return __a.get() == __b.get(); }
 
+  template<typename _Tp, _Lock_policy _Lp>
+    inline bool
+    operator==(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t)
+    { return __a.get() == nullptr; }
+
+  template<typename _Tp, _Lock_policy _Lp>
+    inline bool
+    operator==(nullptr_t, const __shared_ptr<_Tp, _Lp>& __b)
+    { return nullptr == __b.get(); }
+
   template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
     inline bool
     operator!=(const __shared_ptr<_Tp1, _Lp>& __a,
 	       const __shared_ptr<_Tp2, _Lp>& __b)
     { return __a.get() != __b.get(); }
 
+  template<typename _Tp, _Lock_policy _Lp>
+    inline bool
+    operator!=(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t)
+    { return __a.get() != nullptr; }
+
+  template<typename _Tp, _Lock_policy _Lp>
+    inline bool
+    operator!=(nullptr_t, const __shared_ptr<_Tp, _Lp>& __b)
+    { return nullptr != __b.get(); }
+
   template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
     inline bool
     operator<(const __shared_ptr<_Tp1, _Lp>& __a,
Index: include/bits/shared_ptr.h
===================================================================
--- include/bits/shared_ptr.h	(revision 163091)
+++ include/bits/shared_ptr.h	(working copy)
@@ -317,11 +317,31 @@ 
     operator==(const shared_ptr<_Tp1>& __a, const shared_ptr<_Tp2>& __b)
     { return __a.get() == __b.get(); }
 
+  template<typename _Tp>
+    inline bool
+    operator==(const shared_ptr<_Tp>& __a, nullptr_t)
+    { return __a.get() == nullptr; }
+
+  template<typename _Tp>
+    inline bool
+    operator==(nullptr_t, const shared_ptr<_Tp>& __b)
+    { return nullptr == __b.get(); }
+
   template<typename _Tp1, typename _Tp2>
     inline bool
     operator!=(const shared_ptr<_Tp1>& __a, const shared_ptr<_Tp2>& __b)
     { return __a.get() != __b.get(); }
 
+  template<typename _Tp>
+    inline bool
+    operator!=(const shared_ptr<_Tp>& __a, nullptr_t)
+    { return __a.get() != nullptr; }
+
+  template<typename _Tp>
+    inline bool
+    operator!=(nullptr_t, const shared_ptr<_Tp>& __b)
+    { return nullptr != __b.get(); }
+
   template<typename _Tp1, typename _Tp2>
     inline bool
     operator<(const shared_ptr<_Tp1>& __a, const shared_ptr<_Tp2>& __b)
Index: testsuite/20_util/unique_ptr/comparison/42925.cc
===================================================================
--- testsuite/20_util/unique_ptr/comparison/42925.cc	(revision 0)
+++ testsuite/20_util/unique_ptr/comparison/42925.cc	(revision 0)
@@ -0,0 +1,37 @@ 
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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/>.
+
+// 20.9.10 Class template unique_ptr [unique.ptr]
+
+#include <memory>
+
+// libstdc++/42925 (also see GB 99)
+void test01()
+{
+  std::unique_ptr<int> ptr;
+  if (ptr == 0)
+    { }
+  if (0 == ptr)
+    { }
+  if (ptr != 0)
+    { }
+  if (0 != ptr)
+    { }
+}
Index: testsuite/20_util/shared_ptr/comparison/42925.cc
===================================================================
--- testsuite/20_util/shared_ptr/comparison/42925.cc	(revision 0)
+++ testsuite/20_util/shared_ptr/comparison/42925.cc	(revision 0)
@@ -0,0 +1,37 @@ 
+// { dg-options "-std=gnu++0x" }
+// { dg-do compile }
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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/>.
+
+// 20.9.11.2 Class template shared_ptr [util.smartptr.shared]
+
+#include <memory>
+
+// libstdc++/42925 (also see GB 99)
+void test01()
+{
+  std::shared_ptr<int> ptr;
+  if (ptr == 0)
+    { }
+  if (0 == ptr)
+    { }
+  if (ptr != 0)
+    { }
+  if (0 != ptr)
+    { }
+}
Index: testsuite/20_util/weak_ptr/comparison/cmp_neg.cc
===================================================================
--- testsuite/20_util/weak_ptr/comparison/cmp_neg.cc	(revision 163091)
+++ testsuite/20_util/weak_ptr/comparison/cmp_neg.cc	(working copy)
@@ -41,9 +41,9 @@ 
   return 0;
 }
 
-// { dg-warning "note" "" { target *-*-* } 327 }
-// { dg-warning "note" "" { target *-*-* } 446 }
-// { dg-warning "note" "" { target *-*-* } 863 }
+// { dg-warning "note" "" { target *-*-* } 347 }
+// { dg-warning "note" "" { target *-*-* } 466 }
+// { dg-warning "note" "" { target *-*-* } 883 }
 // { dg-warning "note" "" { target *-*-* } 580 }
 // { dg-warning "note" "" { target *-*-* } 1027 }
 // { dg-warning "note" "" { target *-*-* } 340 }