From: Paolo Carlini <paolo.carlini@oracle.com>
Date: Wed, 25 Mar 2015 12:55:04 +0000 (+0000)
Subject: re PR libstdc++/65543 (rvalue stream insertion and extraction operators incorrectly... 
X-Git-Tag: releases/gcc-4.9.3~249
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e999fe672f3dd10cc9526c5cd4d144d5d98a4c0;p=thirdparty%2Fgcc.git

re PR libstdc++/65543 (rvalue stream insertion and extraction operators incorrectly implemented)

2015-03-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/65543
	* include/std/istream (operator>>(basic_istream<>&&, _Tp&): Revert
	thinko in r150387.
	* include/std/ostream (operator<<(basic_ostream<>&&, const _Tp&):
	Likewise.
	* testsuite/27_io/rvalue_streams-2.cc: New.

From-SVN: r221663
---

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 3c8b9e812630..b2819101d391 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,12 @@
+2015-03-25  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR libstdc++/65543
+	* include/std/istream (operator>>(basic_istream<>&&, _Tp&): Revert
+	thinko in r150387.
+	* include/std/ostream (operator<<(basic_ostream<>&&, const _Tp&):
+	Likewise.
+	* testsuite/27_io/rvalue_streams-2.cc: New.
+
 2015-02-03  Tim Shen  <timshen@google.com>
 
 	PR libstdc++/64680
diff --git a/libstdc++-v3/include/std/istream b/libstdc++-v3/include/std/istream
index f0637680d3b9..2b157f59a64a 100644
--- a/libstdc++-v3/include/std/istream
+++ b/libstdc++-v3/include/std/istream
@@ -870,7 +870,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   template<typename _CharT, typename _Traits, typename _Tp>
     inline basic_istream<_CharT, _Traits>&
     operator>>(basic_istream<_CharT, _Traits>&& __is, _Tp& __x)
-    { return (__is >> __x); }
+    { 
+      __is >> __x;
+      return __is;
+    }
 #endif // C++11
 
 _GLIBCXX_END_NAMESPACE_VERSION
diff --git a/libstdc++-v3/include/std/ostream b/libstdc++-v3/include/std/ostream
index 18a56aea10cd..2f89a21dea2f 100644
--- a/libstdc++-v3/include/std/ostream
+++ b/libstdc++-v3/include/std/ostream
@@ -600,7 +600,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   template<typename _CharT, typename _Traits, typename _Tp>
     inline basic_ostream<_CharT, _Traits>&
     operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
-    { return (__os << __x); }
+    {
+      __os << __x;
+      return __os;
+    }
 #endif // C++11
 
 _GLIBCXX_END_NAMESPACE_VERSION
diff --git a/libstdc++-v3/testsuite/27_io/rvalue_streams-2.cc b/libstdc++-v3/testsuite/27_io/rvalue_streams-2.cc
new file mode 100644
index 000000000000..d9b61464b580
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/rvalue_streams-2.cc
@@ -0,0 +1,35 @@
+// { dg-options "-std=gnu++11" }
+// { dg-do compile }
+
+// Copyright (C) 2015 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 <sstream>
+
+struct A {};
+
+void operator<<(std::ostream&, const A&) { }
+void operator>>(std::istream&, A&) { }
+
+// PR libstdc++/65543
+int main()
+{
+  A a;
+
+  std::ostringstream() << a;
+  std::istringstream() >> a;
+}