move.h (move_if_noexcept): Add.
2011-04-27 Paolo Carlini <paolo.carlini@oracle.com> * include/bits/move.h (move_if_noexcept): Add. * testsuite/20_util/move_if_noexcept/requirements/ explicit_instantiation.cc: New. * testsuite/20_util/move_if_noexcept/1.cc: Likewise. From-SVN: r173044
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Paolo Carlini
Paolo Carlini
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@ -1,3 +1,10 @@
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2011-04-27 Paolo Carlini <paolo.carlini@oracle.com>
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* include/bits/move.h (move_if_noexcept): Add.
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* testsuite/20_util/move_if_noexcept/requirements/
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explicit_instantiation.cc: New.
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* testsuite/20_util/move_if_noexcept/1.cc: Likewise.
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2011-04-25 Paolo Carlini <paolo.carlini@oracle.com>
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* include/std/type_traits (struct underlying_type): Add.
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@ -1,6 +1,6 @@
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// Move, forward and identity for C++0x + swap -*- C++ -*-
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// Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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// Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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@ -73,7 +73,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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/**
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* @brief Move a value.
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* @ingroup mutating_algorithms
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* @ingroup utilities
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* @param __t A thing of arbitrary type.
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* @return Same, moved.
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*/
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@ -82,12 +82,27 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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move(_Tp&& __t)
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{ return static_cast<typename std::remove_reference<_Tp>::type&&>(__t); }
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/**
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* @brief Move unless it could throw and the type is copyable.
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* @ingroup utilities
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* @param __x A thing of arbitrary type.
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* @return Same, possibly moved.
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*/
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template<typename _Tp>
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inline typename
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conditional<(!is_nothrow_move_constructible<_Tp>::value
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&& is_copy_constructible<_Tp>::value),
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const _Tp&, _Tp&&>::type
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move_if_noexcept(_Tp& __x) noexcept
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{ return std::move(__x); }
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/// declval, from type_traits.
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/**
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* @brief Returns the actual address of the object or function
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* referenced by r, even in the presence of an overloaded
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* operator&.
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* @ingroup utilities
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* @param __r Reference to an object or function.
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* @return The actual address.
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*/
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@ -112,7 +127,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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/**
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* @brief Swaps two values.
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* @ingroup mutating_algorithms
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* @ingroup utilities
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* @param __a A thing of arbitrary type.
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* @param __b Another thing of arbitrary type.
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* @return Nothing.
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119
libstdc++-v3/testsuite/20_util/move_if_noexcept/1.cc
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119
libstdc++-v3/testsuite/20_util/move_if_noexcept/1.cc
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@ -0,0 +1,119 @@
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// { dg-options "-std=gnu++0x" }
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// 2011-04-27 Paolo Carlini <paolo.carlini@oracle.com>
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//
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// Copyright (C) 2011 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <utility>
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#include <testsuite_hooks.h>
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struct noexcept_move_copy
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{
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noexcept_move_copy()
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: status(true)
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{ };
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noexcept_move_copy(noexcept_move_copy&& r) noexcept
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{ r.status = false; };
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noexcept_move_copy(const noexcept_move_copy&) = default;
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operator bool() { return status; }
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private:
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bool status;
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};
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struct noexcept_move_no_copy
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{
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noexcept_move_no_copy()
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: status(true)
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{ };
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noexcept_move_no_copy(noexcept_move_no_copy&& r) noexcept
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{ r.status = false; };
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noexcept_move_no_copy(const noexcept_move_no_copy&) = delete;
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operator bool() { return status; }
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private:
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bool status;
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};
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struct except_move_copy
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{
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except_move_copy()
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: status(true)
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{ };
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except_move_copy(except_move_copy&& r) noexcept(false)
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{ r.status = false; };
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except_move_copy(const except_move_copy&) = default;
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operator bool() { return status; }
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private:
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bool status;
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};
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struct except_move_no_copy
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{
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except_move_no_copy()
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: status(true)
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{ };
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except_move_no_copy(except_move_no_copy&& r) noexcept(false)
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{ r.status = false; };
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except_move_no_copy(const except_move_no_copy&) = delete;
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operator bool() { return status; }
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private:
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bool status;
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};
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void
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test01()
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{
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bool test __attribute__((unused)) = true;
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noexcept_move_copy nemc1;
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auto nemc2 __attribute__((unused)) = std::move_if_noexcept(nemc1);
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VERIFY( nemc1 == false );
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noexcept_move_no_copy nemnc1;
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auto nemnc2 __attribute__((unused)) = std::move_if_noexcept(nemnc1);
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VERIFY( nemnc1 == false );
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except_move_copy emc1;
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auto emc2 __attribute__((unused)) = std::move_if_noexcept(emc1);
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VERIFY( emc1 == true );
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except_move_no_copy emnc1;
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auto emnc2 __attribute__((unused)) = std::move_if_noexcept(emnc1);
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VERIFY( emnc1 == false );
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}
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int main()
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{
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test01();
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return 0;
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}
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@ -0,0 +1,36 @@
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// { dg-options "-std=gnu++0x" }
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// { dg-do compile }
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// 2011-04-27 Paolo Carlini <paolo.carlini@oracle.com>
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// Copyright (C) 2011 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// NB: This file is for testing utility with NO OTHER INCLUDES.
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#include <utility>
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namespace std
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{
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typedef short test_type;
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template
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std::conditional<(!std::is_nothrow_move_constructible<test_type>::value
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&& std::is_copy_constructible<test_type>::value),
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const test_type&, test_type&&>::type
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move_if_noexcept(test_type&);
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}
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