X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=libstdc%2B%2B-v3%2Ftestsuite%2F27_io%2Fbasic_stringstream%2Fstr%2Fchar%2F2.cc;fp=libstdc%2B%2B-v3%2Ftestsuite%2F27_io%2Fbasic_stringstream%2Fstr%2Fchar%2F2.cc;h=46418e648cd8418587a7d3f64fc05152a6e3161f;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/libstdc++-v3/testsuite/27_io/basic_stringstream/str/char/2.cc b/libstdc++-v3/testsuite/27_io/basic_stringstream/str/char/2.cc new file mode 100644 index 00000000..46418e64 --- /dev/null +++ b/libstdc++-v3/testsuite/27_io/basic_stringstream/str/char/2.cc @@ -0,0 +1,74 @@ +// 2001-05-24 Benjamin Kosnik + +// Copyright (C) 2001, 2002, 2003, 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 +// . + +// 27.7.6 member functions (stringstream_members) + +#include +#include + +void +redirect_buffer(std::ios& stream, std::streambuf* new_buf) +{ stream.rdbuf(new_buf); } + +std::streambuf* +active_buffer(std::ios& stream) +{ return stream.rdbuf(); } + +// libstdc++/2832 +void test02() +{ + bool test __attribute__((unused)) = true; + const char* strlit01 = "fuck war"; + const std::string str00; + const std::string str01(strlit01); + std::string str02; + std::stringbuf sbuf(str01); + std::streambuf* pbasebuf0 = &sbuf; + + std::stringstream sstrm1; + VERIFY( sstrm1.str() == str00 ); + // derived rdbuf() always returns original streambuf, even though + // it's no longer associated with the stream. + std::stringbuf* const buf1 = sstrm1.rdbuf(); + // base rdbuf() returns the currently associated streambuf + std::streambuf* pbasebuf1 = active_buffer(sstrm1); + redirect_buffer(sstrm1, &sbuf); + std::stringbuf* const buf2 = sstrm1.rdbuf(); + std::streambuf* 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::stringbuf* psbuf = dynamic_cast(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; +}