Make streams movable and swappable.

	PR libstdc++/54316
	PR libstdc++/53626
	* config/abi/pre/gnu.ver: Add new exports.
	* config/io/basic_file_stdio.h (__basic_file): Support moving and
	swapping.
	* include/bits/basic_ios.h (basic_ios::move, basic_ios::swap):
	Likewise.
	* include/bits/ios_base.h (ios_base::_M_move, ios_base::_M_swap):
	Likewise.
	* include/bits/fstream.tcc (basic_filebuf): Likewise.
	* include/bits/move.h (__exchange): Define for C++11 mode.
	* include/ext/stdio_filebuf.h (stdio_filebuf): Support moving and
	swapping.
	* include/ext/stdio_sync_filebuf.h (stdio_sync_filebuf): Likewise.
	* include/std/fstream (basic_filebuf, basic_ifstream, basic_ofstream,
	basic_fstream): Likewise.
	* include/std/ios: Remove whitespace.
	* include/std/istream (basic_istream, basic_iostream): Support moving
	and swapping.
	* include/std/ostream (basic_ostream): Likewise.
	* include/std/sstream (basic_stringbuf, basic_istringstream,
	basic_ostringstream, basic_stringstream): Likewise.
	* include/std/streambuf (basic_streambuf): Do not default copy
	constructor and assignment on first declaration.
	* include/std/utility (exchange): Forward to __exchange.
	* testsuite/27_io/basic_filebuf/cons/char/copy_neg.cc: New.
	* src/c++11/Makefile.am: Add stream-related files.
	* src/c++11/Makefile.in: Regenerate.
	* src/c++11/ext11-inst.cc (stdio_filebuf, stdio_sync_filebuf):
	New file for explicit instantiation definitions.
	* src/c++11/ios.cc: Move from src/c++98 to here.
	(ios_base::_M_move, ios_base::_M_swap): Define.
	* src/c++11/ios-inst.cc: Move from src/c++98 to here.
	* src/c++11/iostream-inst.cc: Likewise.
	* src/c++11/istream-inst.cc: Likewise.
	* src/c++11/ostream-inst.cc: Likewise.
	* src/c++11/sstream-inst.cc: Likewise.
	* src/c++11/streambuf-inst.cc: Likewise.
	* src/c++98/Makefile.am: Remove stream-related files.
	* src/c++98/Makefile.in: Regenerate.
	* src/c++98/ext-inst.cc (stdio_filebuf): Remove explicit
	instantiations.
	* src/c++98/misc-inst.cc (stdio_sync_filebuf): Likewise.
	* src/c++98/ios-inst.cc: Move to src/c++11/.
	* src/c++98/ios.cc: Move to src/c++11/.
	* src/c++98/iostream-inst.cc: Likewise.
	* src/c++98/istream-inst.cc: Likewise.
	* src/c++98/ostream-inst.cc: Likewise.
	* src/c++98/sstream-inst.cc: Likewise.
	* src/c++98/streambuf-inst.cc: Likewise.
	* testsuite/27_io/basic_filebuf/cons/char/copy_neg.cc: New.
	* testsuite/27_io/basic_fstream/cons/move.cc: New.
	* testsuite/27_io/basic_fstream/assign/1.cc: New.
	* testsuite/27_io/basic_ifstream/cons/move.cc: New.
	* testsuite/27_io/basic_ifstream/assign/1.cc: New.
	* testsuite/27_io/basic_istringstream/assign/1.cc: New.
	* testsuite/27_io/basic_istringstream/cons/move.cc: New.
	* testsuite/27_io/basic_ofstream/cons/move.cc: New.
	* testsuite/27_io/basic_ofstream/assign/1.cc: New.
	* testsuite/27_io/basic_ostringstream/assign/1.cc: New.
	* testsuite/27_io/basic_ostringstream/cons/move.cc: New.
	* testsuite/27_io/basic_stringstream/assign/1.cc: New.
	* testsuite/27_io/basic_stringstream/cons/move.cc: New.

From-SVN: r215463

1 files changed, 100 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/27_io/basic_stringstream/assign/1.cc b/libstdc++-v3/testsuite/27_io/basic_stringstream/assign/1.cc
new file mode 100644
index 00000000000..0465461c7cb
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringstream/assign/1.cc
@@ -0,0 +1,100 @@
+// { dg-options "-std=gnu++11" }
+
+// Copyright (C) 2014 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/>.
+
+// 27.8.5.2 Assign and swap [stringstream.assign]
+
+#include <sstream>
+#include <string>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+  std::stringstream s1;
+  s1 << "absence of a signal";
+  std::string s;
+  s1 >> s;
+
+  std::stringstream s2;
+  s2 = std::move(s1);
+  s2 >> s;
+  VERIFY(s == "of");
+
+  std::stringstream s3;
+  s3.swap(s2);
+  s3 >> s;
+  VERIFY(s == "a");
+
+  swap(s1, s3);
+  s1 >> s;
+  VERIFY(s == "signal");
+
+  s2 << "should never be used as a signal";
+  s1 = std::move(s2);
+  getline(s1, s);
+  VERIFY(s == "should never be used as a signal");
+  s3 = std::move(s1);
+  VERIFY(s3.eof());
+}
+
+void test02()
+{
+  std::stringstream s0;
+  s0 << " 1234.5 ";
+  std::stringstream s;
+  s = std::move(s0);
+  char c{};
+  s >> c;
+  VERIFY( c == '1' );
+  int i{};
+  s >> i;
+  VERIFY( i == 234 );
+  double d{};
+  s >> d;
+  VERIFY( d == .5 );
+}
+
+void test03()
+{
+#ifdef _GLIBCXX_USE_WCHAR_T
+  std::wstringstream s0;
+  s0 << L" 1234.5 ";
+  std::wstringstream s;
+  s = std::move(s0);
+  s.swap(s0);
+  swap(s, s0);
+  wchar_t c{};
+  s >> c;
+  VERIFY( c == L'1' );
+  int i{};
+  s >> i;
+  VERIFY( i == 234 );
+  double d{};
+  s >> d;
+  VERIFY( d == .5 );
+#endif
+}
+
+int
+main()
+{
+  test01();
+  test02();
+  test03();
+}