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stl_algobase.h (swap): Move...
2007-10-10 Paolo Carlini <pcarlini@suse.de> Chris Fairles <chris.fairles@gmail.com> * include/bits/stl_algobase.h (swap): Move... * include/bits/stl_move.h: ... here. * include/bits/stl_pair.h (pair<>::pair(_U1&&, _U2&&), pair<>::pair(pair<>&&), pair<>::operator=(pair<>&&), pair<>::swap(pair&&), swap(&, &), swap(&&, &), swap(&, &&), make_pair(_T1&&, _T2&&)): Add. * testsuite/20_util/pair/swap.cc: Add. Co-Authored-By: Chris Fairles <chris.fairles@gmail.com> From-SVN: r129198
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Paolo Carlini
Paolo Carlini
parent
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commit
e14e932bbb
@ -1,3 +1,14 @@
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2007-10-10 Paolo Carlini <pcarlini@suse.de>
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Chris Fairles <chris.fairles@gmail.com>
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* include/bits/stl_algobase.h (swap): Move...
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* include/bits/stl_move.h: ... here.
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* include/bits/stl_pair.h (pair<>::pair(_U1&&, _U2&&),
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pair<>::pair(pair<>&&), pair<>::operator=(pair<>&&),
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pair<>::swap(pair&&), swap(&, &), swap(&&, &), swap(&, &&),
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make_pair(_T1&&, _T2&&)): Add.
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* testsuite/20_util/pair/swap.cc: Add.
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2007-10-09 Wolfgang Bangerth <bangerth@dealii.org>
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PR libstdc++/33485 continued.
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@ -73,31 +73,10 @@
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#include <bits/stl_iterator.h>
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#include <bits/concept_check.h>
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#include <debug/debug.h>
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#include <bits/stl_move.h> // For _GLIBCXX_MOVE
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#include <bits/stl_move.h> // For std::swap and _GLIBCXX_MOVE
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_GLIBCXX_BEGIN_NAMESPACE(std)
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/**
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* @brief Swaps two values.
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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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*
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* This is the simple classic generic implementation. It will work on
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* any type which has a copy constructor and an assignment operator.
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*/
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template<typename _Tp>
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inline void
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swap(_Tp& __a, _Tp& __b)
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{
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// concept requirements
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__glibcxx_function_requires(_SGIAssignableConcept<_Tp>)
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_Tp __tmp = _GLIBCXX_MOVE(__a);
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__a = _GLIBCXX_MOVE(__b);
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__b = _GLIBCXX_MOVE(__tmp);
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}
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// See http://gcc.gnu.org/ml/libstdc++/2004-08/msg00167.html: in a
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// nutshell, we are partially implementing the resolution of DR 187,
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// when it's safe, i.e., the value_types are equal.
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@ -1,4 +1,4 @@
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// Move, forward and identity implementation for C++0x -*- C++ -*-
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// Move, forward and identity for C++0x + swap -*- C++ -*-
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// Copyright (C) 2007 Free Software Foundation, Inc.
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//
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@ -35,6 +35,9 @@
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#ifndef _STL_MOVE_H
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#define _STL_MOVE_H 1
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#include <bits/c++config.h>
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#include <bits/concept_check.h>
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#ifdef __GXX_EXPERIMENTAL_CXX0X__
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#include <type_traits>
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@ -64,4 +67,26 @@ _GLIBCXX_END_NAMESPACE
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#define _GLIBCXX_MOVE(_Tp) _Tp
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#endif
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_GLIBCXX_BEGIN_NAMESPACE(std)
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/**
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* @brief Swaps two values.
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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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*/
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template<typename _Tp>
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inline void
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swap(_Tp& __a, _Tp& __b)
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{
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// concept requirements
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__glibcxx_function_requires(_SGIAssignableConcept<_Tp>)
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_Tp __tmp = _GLIBCXX_MOVE(__a);
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__a = _GLIBCXX_MOVE(__b);
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__b = _GLIBCXX_MOVE(__tmp);
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}
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_GLIBCXX_END_NAMESPACE
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#endif /* _STL_MOVE_H */
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@ -62,7 +62,8 @@
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#ifndef _STL_PAIR_H
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#define _STL_PAIR_H 1
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#include <bits/stl_move.h>
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#include <bits/stl_move.h> // for std::move / std::forward, std::decay, and
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// std::swap
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_GLIBCXX_BEGIN_NAMESPACE(std)
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@ -87,15 +88,28 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
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pair(const _T1& __a, const _T2& __b)
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: first(__a), second(__b) { }
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/** There is also a templated copy ctor for the @c pair class itself. */
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template<class _U1, class _U2>
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pair(const pair<_U1, _U2>& __p)
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: first(__p.first), second(__p.second) { }
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#ifdef __GXX_EXPERIMENTAL_CXX0X__
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template<class _U1, class _U2>
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pair(_U1&& __x, _U2&& __y)
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: first(std::forward<_U1>(__x)),
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second(std::forward<_U2>(__y)) { }
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pair(pair&& __p)
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: first(std::move(__p.first)),
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second(std::move(__p.second)) { }
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#endif
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/** There is also a templated copy ctor for the @c pair class itself. */
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template<class _U1, class _U2>
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pair(const pair<_U1, _U2>& __p)
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: first(__p.first),
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second(__p.second) { }
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#ifdef __GXX_EXPERIMENTAL_CXX0X__
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template<class _U1, class _U2>
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pair(pair<_U1, _U2>&& __p)
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: first(std::move(__p.first)),
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second(std::move(__p.second)) { }
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pair&
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operator=(pair&& __p)
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@ -104,6 +118,23 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
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second = std::move(__p.second);
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return *this;
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}
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template<class _U1, class _U2>
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pair&
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operator=(pair<_U1, _U2>&& __p)
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{
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first = std::move(__p.first);
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second = std::move(__p.second);
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return *this;
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}
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void
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swap(pair&& __p)
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{
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using std::swap;
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swap(first, __p.first);
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swap(second, __p.second);
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}
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#endif
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};
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@ -144,6 +175,24 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
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operator>=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
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{ return !(__x < __y); }
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#ifdef __GXX_EXPERIMENTAL_CXX0X__
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/// See std::pair::swap().
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template<class _T1, class _T2>
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inline void
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swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y)
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{ __x.swap(__y); }
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template<class _T1, class _T2>
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inline void
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swap(pair<_T1, _T2>&& __x, pair<_T1, _T2>& __y)
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{ __x.swap(__y); }
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template<class _T1, class _T2>
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inline void
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swap(pair<_T1, _T2>& __x, pair<_T1, _T2>&& __y)
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{ __x.swap(__y); }
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#endif
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/**
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* @brief A convenience wrapper for creating a pair from two objects.
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* @param x The first object.
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@ -156,10 +205,22 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
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*/
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 181. make_pair() unintended behavior
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#ifndef __GXX_EXPERIMENTAL_CXX0X__
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template<class _T1, class _T2>
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inline pair<_T1, _T2>
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make_pair(_T1 __x, _T2 __y)
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{ return pair<_T1, _T2>(__x, __y); }
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#else
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template<class _T1, class _T2>
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inline pair<typename std::decay<_T1>::type,
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typename std::decay<_T2>::type>
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make_pair(_T1&& __x, _T2&& __y)
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{
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return pair<typename std::decay<_T1>::type,
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typename std::decay<_T2>::type>(std::forward<_T1>(__x),
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std::forward<_T2>(__y));
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}
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#endif
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_GLIBCXX_END_NAMESPACE
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59
libstdc++-v3/testsuite/20_util/pair/swap.cc
Normal file
59
libstdc++-v3/testsuite/20_util/pair/swap.cc
Normal file
@ -0,0 +1,59 @@
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// { dg-options "-std=gnu++0x" }
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// Copyright (C) 2007 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 2, 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 COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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#include <utility>
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#include <testsuite_allocator.h>
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#include <testsuite_hooks.h>
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void test01()
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{
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bool test __attribute__((unused)) = true;
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typedef __gnu_test::uneq_allocator<double> ua_type;
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ua_type one(1), two(2);
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std::pair<ua_type, int> p1(one, 1), p2(two, 2);
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p1.swap(p2);
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VERIFY( p1.first.get_personality() == 2 );
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VERIFY( p1.second == 2 );
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VERIFY( p2.first.get_personality() == 1 );
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VERIFY( p2.second == 1 );
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swap(p1, p2);
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VERIFY( p2.first.get_personality() == 2 );
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VERIFY( p2.second == 2 );
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VERIFY( p1.first.get_personality() == 1 );
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VERIFY( p1.second == 1 );
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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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