Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / testsuite / 27_io / basic_ostringstream / rdbuf / wchar_t / 2832.cc

diff --git a/libstdc++-v3/testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc b/libstdc++-v3/testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc
new file mode 100644 (file)
index 0000000..b894640
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc
@@ -0,0 +1,72 @@
+// Copyright (C) 2004, 2009 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/>.
+
+// 27.7.3.2 member functions (ostringstream_members)
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+void 
+redirect_buffer(std::wios& stream, std::wstreambuf* new_buf) 
+{ stream.rdbuf(new_buf); }
+
+std::wstreambuf*
+active_buffer(std::wios& stream)
+{ return stream.rdbuf(); }
+
+// libstdc++/2832
+void test02()
+{
+  bool test __attribute__((unused)) = true;
+  const wchar_t* strlit01 = L"fuck war";
+  const std::wstring str00;
+  const std::wstring str01(strlit01);
+  std::wstring str02;
+  std::wstringbuf sbuf(str01);
+  std::wstreambuf* pbasebuf0 = &sbuf;
+
+  std::wostringstream sstrm1;
+  VERIFY( sstrm1.str() == str00 );
+  // derived rdbuf() always returns original streambuf, even though
+  // it's no longer associated with the stream.
+  std::wstringbuf* const buf1 = sstrm1.rdbuf();
+  // base rdbuf() returns the currently associated streambuf
+  std::wstreambuf* pbasebuf1 = active_buffer(sstrm1);
+  redirect_buffer(sstrm1, &sbuf);
+  std::wstringbuf* const buf2 = sstrm1.rdbuf();
+  std::wstreambuf* pbasebuf2 = active_buffer(sstrm1);
+  VERIFY( buf1 == buf2 ); 
+  VERIFY( pbasebuf1 != pbasebuf2 );
+  VERIFY( pbasebuf2 == pbasebuf0 );
+
+  // derived rdbuf() returns the original buf, so str() doesn't change.
+  VERIFY( sstrm1.str() != str01 );
+  VERIFY( sstrm1.str() == str00 );
+  // however, casting the active streambuf to a stringbuf shows what's up:
+  std::wstringbuf* psbuf = dynamic_cast<std::wstringbuf*>(pbasebuf2);
+  str02 = psbuf->str();
+  VERIFY( str02 == str01 );
+
+  // How confusing and non-intuitive is this?
+  // These semantics are a joke, a serious defect, and incredibly lame.
+}
+
+int main()
+{
+  test02();
+  return 0;
+}