re PR libstdc++/48635 ([C++0x] unique_ptr<T, D&> moves the deleter instead of copying it)

2011-04-15  Daniel Krugler  <daniel.kruegler@googlemail.com>
	    Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/48635
	* include/bits/unique_ptr.h (unique_ptr<>::operator=(unique_ptr&&),
	unique_ptr<>::operator=(unique_ptr<>&&),
	unique_ptr<_Tp[],>::operator=(unique_ptr&&),
	unique_ptr<_Tp[],>::operator=(unique_ptr<>&&)): Forward the deleter
	instead of moving it.
	* testsuite/20_util/unique_ptr/assign/48635.cc: New.

Co-Authored-By: Paolo Carlini <paolo.carlini@oracle.com>

From-SVN: r172532

libstdc++-v3/ChangeLog

@@ -1,3 +1,14 @@
+2011-04-15  Daniel Krugler  <daniel.kruegler@googlemail.com>
+	    Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR libstdc++/48635
+	* include/bits/unique_ptr.h (unique_ptr<>::operator=(unique_ptr&&),
+	unique_ptr<>::operator=(unique_ptr<>&&),
+	unique_ptr<_Tp[],>::operator=(unique_ptr&&),
+	unique_ptr<_Tp[],>::operator=(unique_ptr<>&&)): Forward the deleter
+	instead of moving it.
+	* testsuite/20_util/unique_ptr/assign/48635.cc: New.
+
 2011-04-15  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* scripts/extract_symvers.pl: Handle NOTY.

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

@@ -171,7 +171,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       operator=(unique_ptr&& __u)
       {
 	reset(__u.release());
-	get_deleter() = std::move(__u.get_deleter());
+	get_deleter() = std::forward<deleter_type>(__u.get_deleter());
 	return *this;
       }
 
@@ -184,7 +184,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	operator=(unique_ptr<_Up, _Ep>&& __u)
 	{
 	  reset(__u.release());
-	  get_deleter() = std::move(__u.get_deleter());
+	  get_deleter() = std::forward<deleter_type>(__u.get_deleter());
 	  return *this;
 	}
 
@@ -315,7 +315,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       operator=(unique_ptr&& __u)
       {
 	reset(__u.release());
-	get_deleter() = std::move(__u.get_deleter());
+	get_deleter() = std::forward<deleter_type>(__u.get_deleter());
 	return *this;
       }
 
@@ -324,7 +324,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	operator=(unique_ptr<_Up, _Ep>&& __u)
 	{
 	  reset(__u.release());
-	  get_deleter() = std::move(__u.get_deleter());
+	  get_deleter() = std::forward<deleter_type>(__u.get_deleter());
 	  return *this;
 	}
 

libstdc++-v3/testsuite/20_util/unique_ptr/assign/48635.cc

@@ -0,0 +1,78 @@
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2011 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/>.
+
+#include <memory>
+#include <testsuite_hooks.h>
+
+struct Deleter
+{
+  Deleter() = default;
+  Deleter(const Deleter&) = default;
+  Deleter(Deleter&&) = default;
+  
+  Deleter&
+  operator=(const Deleter&)
+  {
+    bool test __attribute__((unused)) = true;
+    VERIFY( true );
+    return *this;
+  }
+
+  Deleter&
+  operator=(Deleter&&)
+  {
+    bool test __attribute__((unused)) = true;
+    VERIFY( false );
+    return *this;
+  }
+
+  template<class T>
+    void
+    operator()(T*) const { }
+};
+
+struct DDeleter : Deleter { };
+
+// libstdc++/48635
+void test01()
+{
+  Deleter d;
+
+  std::unique_ptr<int, Deleter&> p1(nullptr, d), p2(nullptr, d);
+  p2 = std::move(p1);
+
+  DDeleter dd;
+
+  std::unique_ptr<int, DDeleter&> p1t(nullptr, dd);
+  std::unique_ptr<int, Deleter&> p2t(nullptr, d);
+  p2t = std::move(p1t);
+
+  std::unique_ptr<int[], Deleter&> p1a(nullptr, d), p2a(nullptr, d);
+  p2a = std::move(p1a);
+
+  std::unique_ptr<int[], DDeleter&> p1at(nullptr, dd);
+  std::unique_ptr<int[], Deleter&> p2at(nullptr, d);
+  p2at = std::move(p1at);
+}
+
+int main()
+{
+  test01();
+  return 0;
+}