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150 lines
5.4 KiB
C++
150 lines
5.4 KiB
C++
/*==============================================================================
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Copyright (c) 2001-2010 Joel de Guzman
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Copyright (c) 2010 Eric Niebler
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Copyright (c) 2015 John Fletcher
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_PHOENIX_FUNCTION_FUNCTION_HPP
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#define BOOST_PHOENIX_FUNCTION_FUNCTION_HPP
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#include <boost/phoenix/config.hpp>
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#include <boost/phoenix/core/limits.hpp>
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#include <boost/phoenix/core/detail/function_eval.hpp>
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#include <boost/utility/result_of.hpp>
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namespace boost { namespace phoenix
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{
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/////////////////////////////////////////////////////////////////////////////
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// Functions
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/////////////////////////////////////////////////////////////////////////////
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namespace expression
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{
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#if defined(BOOST_PHOENIX_NO_VARIADIC_FUNCTION)
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template <typename F, BOOST_PHOENIX_typename_A_void(BOOST_PHOENIX_ACTOR_LIMIT)>
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struct function
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: detail::expression::function_eval<F, BOOST_PHOENIX_A(BOOST_PHOENIX_ACTOR_LIMIT)>
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{};
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#else
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// TODO:
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#endif
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}
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// functor which returns our lazy function call extension
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template<typename F>
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struct function
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{
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BOOST_CONSTEXPR function()
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: f()
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{}
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BOOST_CONSTEXPR function(F f_)
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: f(f_)
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{}
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template <typename Sig>
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struct result;
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#if defined(BOOST_PHOENIX_NO_VARIADIC_FUNCTION)
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typename detail::expression::function_eval<F>::type const
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operator()() const
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{
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return detail::expression::function_eval<F>::make(f);
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}
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// Bring in the rest
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#include <boost/phoenix/function/detail/cpp03/function_operator.hpp>
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// Solves the result problem for F(X)
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template <typename This, typename A0>
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struct result<This(A0)>
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: detail::expression::function_eval<F,
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typename boost::remove_reference<A0>::type>
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{};
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// Solves the result problem for F(X,Y)
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template <typename This, typename A0, typename A1>
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struct result<This(A0,A1)>
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: detail::expression::function_eval<F,
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typename boost::remove_reference<A0>::type,
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typename boost::remove_reference<A1>::type>
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{};
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// Solves the result problem for F(X,Y,Z)
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template <typename This, typename A0, typename A1, typename A2>
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struct result<This(A0,A1,A2)>
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: detail::expression::function_eval<F,
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typename boost::remove_reference<A0>::type,
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typename boost::remove_reference<A1>::type,
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typename boost::remove_reference<A2>::type>
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{};
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// Solves the result problem for F(W,X,Y,Z)
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template <typename This, typename A0, typename A1,
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typename A2, typename A3>
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struct result<This(A0,A1,A2,A3)>
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: detail::expression::function_eval<F,
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typename boost::remove_reference<A0>::type,
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typename boost::remove_reference<A1>::type,
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typename boost::remove_reference<A2>::type,
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typename boost::remove_reference<A3>::type>
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{};
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// Solves the result problem for F(V,W,X,Y,Z)
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template <typename This, typename A0, typename A1,
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typename A2, typename A3,typename A4>
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struct result<This(A0,A1,A2,A3,A4)>
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: detail::expression::function_eval<F,
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typename boost::remove_reference<A0>::type,
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typename boost::remove_reference<A1>::type,
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typename boost::remove_reference<A2>::type,
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typename boost::remove_reference<A3>::type,
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typename boost::remove_reference<A4>::type>
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{};
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// Solves the result problem for F(U,V,W,X,Y,Z)
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template <typename This, typename A0, typename A1,
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typename A2, typename A3,typename A4,
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typename A5>
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struct result<This(A0,A1,A2,A3,A4,A5)>
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: detail::expression::function_eval<F,
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typename boost::remove_reference<A0>::type,
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typename boost::remove_reference<A1>::type,
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typename boost::remove_reference<A2>::type,
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typename boost::remove_reference<A3>::type,
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typename boost::remove_reference<A4>::type,
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typename boost::remove_reference<A5>::type>
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{};
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// Solves the result problem for F(T,U,V,W,X,Y,Z)
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template <typename This, typename A0, typename A1,
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typename A2, typename A3,typename A4,
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typename A5, typename A6>
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struct result<This(A0,A1,A2,A3,A4,A5,A6)>
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: detail::expression::function_eval<F,
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typename boost::remove_reference<A0>::type,
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typename boost::remove_reference<A1>::type,
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typename boost::remove_reference<A2>::type,
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typename boost::remove_reference<A3>::type,
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typename boost::remove_reference<A4>::type,
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typename boost::remove_reference<A5>::type,
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typename boost::remove_reference<A6>::type>
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{};
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#else
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// TODO:
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#endif
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F f;
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};
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}
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template<typename F>
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struct result_of<phoenix::function<F>()>
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: phoenix::detail::expression::function_eval<F>
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{};
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}
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#endif
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