stl_algobase.h (iter_swap): In C++11 mode just call swap.

2012-03-05  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/bits/stl_algobase.h (iter_swap): In C++11 mode just
	call swap.
	* include/bits/stl_bvector.h (swap(_Bit_reference,
	_Bit_reference), swap(_Bit_reference, bool&),
	swap(bool&, _Bit_reference)): Add.
	* testsuite/23_containers/vector/bool/swap.cc: New.

From-SVN: r184939

4 files changed, 107 insertions, 6 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 5f3f3cd..cf6d913 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,12 @@
+2012-03-05  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* include/bits/stl_algobase.h (iter_swap): In C++11 mode simply
+	call swap.
+	* include/bits/stl_bvector.h (swap(_Bit_reference,
+	_Bit_reference), swap(_Bit_reference, bool&),
+	swap(bool&, _Bit_reference)): Add.
+	* testsuite/23_containers/vector/bool/swap.cc: New.
+
 2012-03-04  Paolo Carlini  <paolo.carlini@oracle.com>
 	    Jonathan Wakely  <jwakely.gcc@gmail.com>
 
diff --git a/libstdc++-v3/include/bits/stl_algobase.h b/libstdc++-v3/include/bits/stl_algobase.h
index a002461..4e6e0f4 100644
--- a/libstdc++-v3/include/bits/stl_algobase.h
+++ b/libstdc++-v3/include/bits/stl_algobase.h
@@ -1,7 +1,7 @@
 // Core algorithmic facilities -*- C++ -*-
 
 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
-// 2011 Free Software Foundation, Inc.
+// 2011, 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
@@ -74,6 +74,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
 {
 _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
+#ifndef __GXX_EXPERIMENTAL_CXX0X__
   // See http://gcc.gnu.org/ml/libstdc++/2004-08/msg00167.html: in a
   // nutshell, we are partially implementing the resolution of DR 187,
   // when it's safe, i.e., the value_types are equal.
@@ -102,6 +103,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
           swap(*__a, *__b);
         }
     };
+#endif
 
   /**
    *  @brief Swaps the contents of two iterators.
@@ -117,16 +119,18 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     inline void
     iter_swap(_ForwardIterator1 __a, _ForwardIterator2 __b)
     {
-      typedef typename iterator_traits<_ForwardIterator1>::value_type
-	_ValueType1;
-      typedef typename iterator_traits<_ForwardIterator2>::value_type
-	_ValueType2;
-
       // concept requirements
       __glibcxx_function_requires(_Mutable_ForwardIteratorConcept<
 				  _ForwardIterator1>)
       __glibcxx_function_requires(_Mutable_ForwardIteratorConcept<
 				  _ForwardIterator2>)
+
+#ifndef __GXX_EXPERIMENTAL_CXX0X__
+      typedef typename iterator_traits<_ForwardIterator1>::value_type
+	_ValueType1;
+      typedef typename iterator_traits<_ForwardIterator2>::value_type
+	_ValueType2;
+
       __glibcxx_function_requires(_ConvertibleConcept<_ValueType1,
 				  _ValueType2>)
       __glibcxx_function_requires(_ConvertibleConcept<_ValueType2,
@@ -140,6 +144,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	&& __are_same<_ValueType1&, _ReferenceType1>::__value
 	&& __are_same<_ValueType2&, _ReferenceType2>::__value>::
 	iter_swap(__a, __b);
+#else
+      swap(*__a, *__b);
+#endif
     }
 
   /**
diff --git a/libstdc++-v3/include/bits/stl_bvector.h b/libstdc++-v3/include/bits/stl_bvector.h
index ec3f83d..dfa0b32 100644
--- a/libstdc++-v3/include/bits/stl_bvector.h
+++ b/libstdc++-v3/include/bits/stl_bvector.h
@@ -108,6 +108,32 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
     { *_M_p ^= _M_mask; }
   };
 
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+  inline void
+  swap(_Bit_reference __x, _Bit_reference __y) noexcept
+  {
+    bool __tmp = __x;
+    __x = __y;
+    __y = __tmp;
+  }
+
+  inline void
+  swap(_Bit_reference __x, bool& __y) noexcept
+  {
+    bool __tmp = __x;
+    __x = __y;
+    __y = __tmp;
+  }
+
+  inline void
+  swap(bool& __x, _Bit_reference __y) noexcept
+  {
+    bool __tmp = __x;
+    __x = __y;
+    __y = __tmp;
+  }
+#endif
+
   struct _Bit_iterator_base
   : public std::iterator<std::random_access_iterator_tag, bool>
   {
diff --git a/libstdc++-v3/testsuite/23_containers/vector/bool/swap.cc b/libstdc++-v3/testsuite/23_containers/vector/bool/swap.cc
new file mode 100644
index 0000000..04aa0db
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/vector/bool/swap.cc
@@ -0,0 +1,59 @@
+// { 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 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/>.
+
+#include <vector>
+#include <testsuite_hooks.h>
+
+template<class Cont>
+  void
+  my_reverse(Cont& c)
+  {
+    for (std::size_t i = 0, j = c.size(); i < j; ++i)
+      {
+	--j;
+	using std::swap;
+	swap(c[i], c[j]);
+      }
+  }
+
+template<class Cont>
+  void
+  my_compare(const Cont& c1, const Cont& c2)
+  {
+    bool test __attribute__((unused)) = true;
+
+    VERIFY( c1.size() == c2.size() );
+
+    for (std::size_t i = 0; i < c1.size(); ++i)
+      VERIFY( c1[i] == c2[c1.size() - i - 1] );
+  }
+
+void test01()
+{
+  const std::vector<bool> vb_ref{0, 1, 1, 0, 1};
+  std::vector<bool>       vb(vb_ref);
+  my_reverse(vb);
+  my_compare(vb_ref, vb);
+}
+
+int main()
+{
+  test01();
+  return 0;
+}