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

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: r221655

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 4758be2b0b00680e2cfef03625695ce12d8c96b1..d4611b83b4c2951d86b1284323515792d7de8973 100644 (file)
--- 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.
+
 2015-03-24  Jonathan Wakely  <jwakely@redhat.com>
 
        PR libstdc++/33394

diff --git a/libstdc++-v3/include/std/istream b/libstdc++-v3/include/std/istream
index 9deef435c76b94e52e0a8b91e57b7e9b95e09c5b..74c0d81e0a37f9641e40b1546f726592264ae2dc 100644 (file)
--- a/libstdc++-v3/include/std/istream
+++ b/libstdc++-v3/include/std/istream
@@ -922,7 +922,10 @@ _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 decb29a5fa336f579df99fb1cc5cada9d237a3cb..151c42bede2b8833ee4d1807fc0b7937c0125961 100644 (file)
--- a/libstdc++-v3/include/std/ostream
+++ b/libstdc++-v3/include/std/ostream
@@ -626,7 +626,10 @@ _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 (file)
index 0000000..d9b6146
--- /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;
+}