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202 lines
6.6 KiB
202 lines
6.6 KiB
/* /////////////////////////////////////////////////////////////////////////
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* File: stlsoft/util/std_swap.hpp
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*
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* Purpose: Contains the std_swap() function.
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*
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* Created: 27th June 2005
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* Updated: 12th August 2010
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*
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* Home: http://stlsoft.org/
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*
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* Copyright (c) 2005-2010, Matthew Wilson and Synesis Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
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* any contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* ////////////////////////////////////////////////////////////////////// */
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/** \file stlsoft/util/std_swap.hpp
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*
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* \brief [C++ only] Swap utility functions
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* (\ref group__library__utility "Utility" Library).
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*/
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#ifndef STLSOFT_INCL_STLSOFT_UTIL_HPP_STD_SWAP
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#define STLSOFT_INCL_STLSOFT_UTIL_HPP_STD_SWAP
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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# define STLSOFT_VER_STLSOFT_UTIL_HPP_STD_SWAP_MAJOR 1
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# define STLSOFT_VER_STLSOFT_UTIL_HPP_STD_SWAP_MINOR 2
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# define STLSOFT_VER_STLSOFT_UTIL_HPP_STD_SWAP_REVISION 2
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# define STLSOFT_VER_STLSOFT_UTIL_HPP_STD_SWAP_EDIT 19
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* /////////////////////////////////////////////////////////////////////////
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* Auto-generation and compatibility
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*/
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/*
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[<[STLSOFT-AUTO:NO-UNITTEST]>]
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*/
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/* /////////////////////////////////////////////////////////////////////////
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* Includes
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*/
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#ifndef STLSOFT_INCL_STLSOFT_H_STLSOFT
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# include <stlsoft/stlsoft.h>
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#endif /* !STLSOFT_INCL_STLSOFT_H_STLSOFT */
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#if !defined(STLSOFT_CF_std_NAMESPACE)
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# define STLSOFT_STD_SWAP_NO_USE_STD
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#endif /* !STLSOFT_CF_std_NAMESPACE */
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#if !defined(STLSOFT_STD_SWAP_NO_USE_STD)
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# include <algorithm>
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#endif /* STLSOFT_STD_SWAP_NO_USE_STD */
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/* /////////////////////////////////////////////////////////////////////////
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* Namespace
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*/
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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#ifndef _STLSOFT_NO_NAMESPACE
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namespace stlsoft_std_swap
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{
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#endif /* _STLSOFT_NO_NAMESPACE */
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* /////////////////////////////////////////////////////////////////////////
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* Functions
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*/
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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// This is defined only when the std namespace is not.
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#ifdef STLSOFT_STD_SWAP_NO_USE_STD
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# ifndef _STLSOFT_NO_NAMESPACE
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namespace stlsoft_nostd_util
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{
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# endif /* _STLSOFT_NO_NAMESPACE */
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template<ss_typename_param_k T>
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inline void swap(T& lhs, T& rhs)
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{
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T tmp(lhs);
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lhs = rhs;
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rhs = tmp;
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}
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# ifndef _STLSOFT_NO_NAMESPACE
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} // namespace stlsoft_nostd_util
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# endif /* _STLSOFT_NO_NAMESPACE */
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#endif /* STLSOFT_STD_SWAP_NO_USE_STD */
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/** \brief Calls std::swap on the arguments, but may also use
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* Argument-Dependent Lookup) to use a specialised form.
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*
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* \ingroup group__library__utility
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*
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* \note For compilers, such as Open Watcom, that do not have a functional
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* standard library implementation, the swap() implementation from
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* stlsoft::stlsoft_nostd_util is used.
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*
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* \param lhs The left hand parameter
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* \param rhs The right hand parameter
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*/
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template<ss_typename_param_k T>
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inline void std_swap(T& lhs, T& rhs)
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{
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// Here we introduce the 'std' implementation, via a 'using namespace std'
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// directive, so that Argument-Dependent Lookup can have the best grab
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#ifdef STLSOFT_STD_SWAP_NO_USE_STD
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# ifndef _STLSOFT_NO_NAMESPACE
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using namespace stlsoft_nostd_util;
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# endif /* !_STLSOFT_NO_NAMESPACE */
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#else /* ? STLSOFT_STD_SWAP_NO_USE_STD */
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# ifdef STLSOFT_CF_std_NAMESPACE
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# if ( ( defined(STLSOFT_COMPILER_IS_INTEL) && \
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defined(_MSC_VER)) || \
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defined(STLSOFT_COMPILER_IS_MSVC)) && \
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_MSC_VER < 1310
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using std::swap;
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# else /* ? compiler */
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using namespace std;
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# endif /* compiler */
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# endif /* STLSOFT_CF_std_NAMESPACE */
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#endif /* STLSOFT_STD_SWAP_NO_USE_STD */
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swap(lhs, rhs);
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}
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* ////////////////////////////////////////////////////////////////////// */
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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#ifndef _STLSOFT_NO_NAMESPACE
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} // namespace stlsoft_std_swap
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#endif /* _STLSOFT_NO_NAMESPACE */
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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#ifndef _STLSOFT_NO_NAMESPACE
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namespace stlsoft
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{
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/// Calls std::swap on the arguments, but may also use Argument-Dependent
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/// Lookup to use a specialised form
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///
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/// \note For compilers, such as Open Watcom, that do not have a functional
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/// standard library implementation, the swap() implementation from
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/// stlsoft::stlsoft_nostd_util is used.
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///
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/// \param lhs The left hand parameter
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/// \param rhs The right hand parameter
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template<ss_typename_param_k T>
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inline void std_swap(T& lhs, T& rhs)
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{
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// Defer to std_swap implementation in stlsoft_std_swap namespace
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//
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// This is to 'isolate' the selection of the swap() algorithm out of
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// the stlsoft namespace, so both stlsoft and std get equal byte at the
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// type resolution
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stlsoft_std_swap::std_swap(lhs, rhs);
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}
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} // namespace stlsoft
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#endif /* _STLSOFT_NO_NAMESPACE */
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/* ////////////////////////////////////////////////////////////////////// */
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#endif /* !STLSOFT_INCL_STLSOFT_UTIL_HPP_STD_SWAP */
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/* ///////////////////////////// end of file //////////////////////////// */
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