Mercurial > hg > CbC > CbC_gcc
view libstdc++-v3/testsuite/27_io/rvalue_streams.cc @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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// Copyright (C) 2008-2020 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/>. // { dg-do run { target c++11 } } #include <sstream> #include <string> #include <testsuite_hooks.h> void test01() { int i = 1742; // This usage isn't supported by the current draft. // std::string result = (std::ostringstream() << i).str(); std::ostringstream() << i; std::string result ("1742"); int i2; std::istringstream(result) >> i2; VERIFY (i == i2); } struct X { bool as_rvalue; }; void operator>>(std::istream&, X& x) { x.as_rvalue = false; } void operator>>(std::istream&, X&& x) { x.as_rvalue = true; } // LWG 2328 Rvalue stream extraction should use perfect forwarding void test02() { X x; std::istringstream is; auto& ref1 = (std::move(is) >> x); VERIFY( &ref1 == &is ); VERIFY( x.as_rvalue == false ); auto& ref2 = (std::move(is) >> std::move(x)); VERIFY( &ref2 == &is ); VERIFY( x.as_rvalue == true ); char arr[2]; std::istringstream("x") >> &arr[0]; std::istringstream("x") >> arr; } int main() { test01(); test02(); return 0; }