mirror of https://github.com/CGAL/cgal
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
#ifndef CGAL_ARGUMENT_SWAPS_H
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#define CGAL_ARGUMENT_SWAPS_H
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#include <CGAL/config.h>
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#include <utility>
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#ifndef CGAL_CXX0X
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#include <boost/preprocessor/repetition.hpp>
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#include <boost/utility/result_of.hpp>
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#endif
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namespace CGAL {
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#ifdef CGAL_CXX0X
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namespace internal {
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template<int,class...> struct Apply_to_last_then_rest_;
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template<int d,class F,class T,class... U>
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struct Apply_to_last_then_rest_<d,F,T,U...> {
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typedef typename Apply_to_last_then_rest_<d-1,F,U...,T>::result_type result_type;
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inline result_type operator()(F&&f,T&&t,U&&...u)const{
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return Apply_to_last_then_rest_<d-1,F,U...,T>()(
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std::forward<F>(f),
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std::forward<U>(u)...,
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std::forward<T>(t));
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}
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};
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template<class F,class T,class... U>
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struct Apply_to_last_then_rest_<0,F,T,U...> {
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typedef decltype(std::declval<F>()(std::declval<T>(), std::declval<U>()...)) result_type;
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inline result_type operator()(F&&f,T&&t,U&&...u)const{
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return std::forward<F>(f)(std::forward<T>(t), std::forward<U>(u)...);
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}
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};
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} // namespace internal
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struct Apply_to_last_then_rest {
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template<class F,class T,class...U> inline
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typename internal::Apply_to_last_then_rest_<sizeof...(U),F,T,U...>::result_type
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operator()(F&&f,T&&t,U&&...u)const{
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return internal::Apply_to_last_then_rest_<sizeof...(U),F,T,U...>()(
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std::forward<F>(f),
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std::forward<T>(t),
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std::forward<U>(u)...);
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}
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};
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#else // CGAL_CXX0X
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struct Apply_to_last_then_rest {
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#define CODE(Z,N,_) template<class F,class T,BOOST_PP_ENUM_PARAMS(N,class T)> \
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typename boost::result_of<F(T,BOOST_PP_ENUM_PARAMS(N,T))>::type \
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operator()(F const&f, BOOST_PP_ENUM_BINARY_PARAMS(N,T,const&t), T const&t) const { \
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return f(t,BOOST_PP_ENUM_PARAMS(N,t)); \
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}
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BOOST_PP_REPEAT_FROM_TO(1,11,CODE,_)
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#undef CODE
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};
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#endif // CGAL_CXX0X
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} // namespace CGAL
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#endif // CGAL_ARGUMENT_SWAPS_H
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