shared_ptr.h (shared_ptr(unique_ptr&&), [...]): Remove explicit specifier (as per DR 925).

2010-03-19  Rodolfo Lima  <rodolfo@rodsoft.org>

	* include/bits/shared_ptr.h (shared_ptr(unique_ptr&&),
	shared_ptr(auto_ptr&&)): Remove explicit specifier (as per DR 925).
	* include/bits/shared_ptr_base.h: Likewise.
	* testsuite/20_util/shared_ptr/creation/dr925.cc: New.

From-SVN: r157570

libstdc++-v3/ChangeLog

+2010-03-19  Rodolfo Lima  <rodolfo@rodsoft.org>
+
+	* include/bits/shared_ptr.h (shared_ptr(unique_ptr&&),
+	shared_ptr(auto_ptr&&)): Remove explicit specifier (as per DR 925).
+	* include/bits/shared_ptr_base.h: Likewise.
+	* testsuite/20_util/shared_ptr/creation/dr925.cc: New.
+
 2010-03-19  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* include/bits/random.tcc: Minor formatting changes.

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

@@ -204,13 +204,12 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
 
 #if _GLIBCXX_DEPRECATED
       template<typename _Tp1>
-	explicit
 	shared_ptr(std::auto_ptr<_Tp1>&& __r)
 	: __shared_ptr<_Tp>(std::move(__r)) { }
 #endif
 
       template<typename _Tp1, typename _Del>
-	explicit shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
+	shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
 	: __shared_ptr<_Tp>(std::move(__r)) { }
 
       template<typename _Tp1>

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

@@ -316,14 +316,14 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
 #if _GLIBCXX_DEPRECATED
       // Special case for auto_ptr<_Tp> to provide the strong guarantee.
       template<typename _Tp>
-	explicit __shared_count(std::auto_ptr<_Tp>&& __r)
+	__shared_count(std::auto_ptr<_Tp>&& __r)
 	: _M_pi(new _Sp_counted_ptr<_Tp*, _Lp>(__r.get()))
 	{ __r.release(); }
 #endif
 
       // Special case for unique_ptr<_Tp,_Del> to provide the strong guarantee.
       template<typename _Tp, typename _Del>
-	explicit __shared_count(std::unique_ptr<_Tp, _Del>&& __r)
+	__shared_count(std::unique_ptr<_Tp, _Del>&& __r)
 	: _M_pi(_S_create_from_up(std::move(__r)))
 	{ __r.release(); }
 
@@ -608,7 +608,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
 
       // If an exception is thrown this constructor has no effect.
       template<typename _Tp1, typename _Del>
-	explicit __shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
+	__shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
 	: _M_ptr(__r.get()), _M_refcount()
 	{
 	  __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)
@@ -620,7 +620,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
 #if _GLIBCXX_DEPRECATED
       // Postcondition: use_count() == 1 and __r.get() == 0
       template<typename _Tp1>
-	explicit __shared_ptr(std::auto_ptr<_Tp1>&& __r)
+	__shared_ptr(std::auto_ptr<_Tp1>&& __r)
 	: _M_ptr(__r.get()), _M_refcount()
 	{
 	  __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)

libstdc++-v3/testsuite/20_util/shared_ptr/creation/dr925.cc

+// { dg-options "-std=gnu++0x -Wno-deprecated" }
+
+// 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 Template class shared_ptr [util.smartptr.shared]
+
+#include <memory>
+#include <testsuite_hooks.h>
+
+struct A
+{
+};
+
+std::unique_ptr<A> 
+create_unique_ptr()
+{
+  return std::unique_ptr<A>(new A());
+}
+
+std::auto_ptr<A> 
+create_auto_ptr()
+{
+  return std::auto_ptr<A>(new A());
+}
+
+void 
+process(std::shared_ptr<A> a)
+{
+  bool test __attribute__((unused)) = true;
+
+  VERIFY( a.get() != 0 );
+  VERIFY( a.use_count() == 1 );
+}
+
+// 20.9.11.2.1 shared_ptr creation [util.smartptr.shared.const]
+
+// Implicit conversion of auto_ptr to shared_ptr is allowed
+
+void
+test01()
+{
+  process(create_auto_ptr());
+}
+
+void
+test02()
+{
+  std::auto_ptr<A> a = create_auto_ptr();
+  process(std::move(a));
+}
+
+// Implicit conversion of unique_ptr to shared_ptr is allowed
+
+void
+test03()
+{
+  process(create_unique_ptr());
+}
+
+void
+test04()
+{
+  std::unique_ptr<A> a = create_unique_ptr();
+  process(std::move(a));
+}
+
+int
+main()
+{
+  test01();
+  test02();
+  test03();
+  test04();
+  return 0;
+}