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// Copyright (c) 2014
// INRIA Saclay-Ile de France (France)
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
//
// Author(s) : Marc Glisse
#ifndef CGAL_ARGUMENT_SWAPS_H
#define CGAL_ARGUMENT_SWAPS_H
#include <CGAL/config.h>
#include <utility>
#ifndef CGAL_CXX11
#include <boost/preprocessor/repetition.hpp>
#include <boost/utility/result_of.hpp>
#endif
namespace CGAL {
#ifdef CGAL_CXX11
namespace internal {
template<int,class...> struct Apply_to_last_then_rest_;
template<int d,class F,class T,class... U>
struct Apply_to_last_then_rest_<d,F,T,U...> {
typedef typename Apply_to_last_then_rest_<d-1,F,U...,T>::result_type result_type;
inline result_type operator()(F&&f,T&&t,U&&...u)const{
return Apply_to_last_then_rest_<d-1,F,U...,T>()(
std::forward<F>(f),
std::forward<U>(u)...,
std::forward<T>(t));
}
};
template<class F,class T,class... U>
struct Apply_to_last_then_rest_<0,F,T,U...> {
typedef decltype(std::declval<F>()(std::declval<T>(), std::declval<U>()...)) result_type;
inline result_type operator()(F&&f,T&&t,U&&...u)const{
return std::forward<F>(f)(std::forward<T>(t), std::forward<U>(u)...);
}
};
} // namespace internal
struct Apply_to_last_then_rest {
template<class F,class T,class...U> inline
typename internal::Apply_to_last_then_rest_<sizeof...(U),F,T,U...>::result_type
operator()(F&&f,T&&t,U&&...u)const{
return internal::Apply_to_last_then_rest_<sizeof...(U),F,T,U...>()(
std::forward<F>(f),
std::forward<T>(t),
std::forward<U>(u)...);
}
};
#else // CGAL_CXX11
struct Apply_to_last_then_rest {
#define CGAL_CODE(Z,N,_) template<class F,class T,BOOST_PP_ENUM_PARAMS(N,class T)> \
typename boost::result_of<F(T,BOOST_PP_ENUM_PARAMS(N,T))>::type \
operator()(F const&f, BOOST_PP_ENUM_BINARY_PARAMS(N,T,const&t), T const&t) const { \
return f(t,BOOST_PP_ENUM_PARAMS(N,t)); \
}
BOOST_PP_REPEAT_FROM_TO(1,11,CGAL_CODE,_)
#undef CGAL_CODE
};
#endif // CGAL_CXX11
} // namespace CGAL
#endif // CGAL_ARGUMENT_SWAPS_H
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