684 lines
17 KiB
C++
684 lines
17 KiB
C++
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////////////////////////////////////////////////////////////////////////////
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// lazy operator.hpp
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//
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// Build lazy operations for Phoenix equivalents for FC++
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//
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// These are equivalents of the Boost FC++ functoids in operator.hpp
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//
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// Implemented so far:
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//
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// make_pair
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// plus minus multiplies divides modulus
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// negate equal not_equal greater less
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// greater_equal less_equal positive
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// logical_and logical_or
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// logical_not min max inc dec
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//
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// These are not from the FC++ operator.hpp but were made for testing purposes.
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//
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// identity (renamed id)
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// sin
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//
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// These are now being modified to use boost::phoenix::function
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// so that they are available for use as arguments.
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// Types are being defined in capitals e.g. Id id;
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////////////////////////////////////////////////////////////////////////////
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/*=============================================================================
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Copyright (c) 2000-2003 Brian McNamara and Yannis Smaragdakis
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Copyright (c) 2001-2007 Joel de Guzman
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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_LAZY_OPERATOR
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#define BOOST_PHOENIX_FUNCTION_LAZY_OPERATOR
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#include <cmath>
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#include <cstdlib>
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#include <boost/phoenix/core.hpp>
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#include <boost/phoenix/function.hpp>
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#include <boost/function.hpp>
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namespace boost {
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namespace phoenix {
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//////////////////////////////////////////////////////////////////////
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// a_unique_type_for_nil
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//////////////////////////////////////////////////////////////////////
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// This may need to be moved elsewhere to define reuser.
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struct a_unique_type_for_nil {
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bool operator==( a_unique_type_for_nil ) const { return true; }
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bool operator< ( a_unique_type_for_nil ) const { return false; }
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typedef a_unique_type_for_nil value_type;
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};
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// This maybe put into a namespace.
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a_unique_type_for_nil NIL;
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//////////////////////////////////////////////////////////////////////
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// lazy_exception - renamed from fcpp_exception.
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//////////////////////////////////////////////////////////////////////
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#ifndef BOOST_PHOENIX_NO_LAZY_EXCEPTIONS
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struct lazy_exception : public std::exception {
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const char* s;
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lazy_exception( const char* ss ) : s(ss) {}
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const char* what() const throw() { return s; }
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};
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#endif
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//////////////////////////////////////////////////////////////////////
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// in ref_count.hpp in BoostFC++
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typedef unsigned int RefCountType;
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namespace impl {
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// Implemented early, moved from lazy_signature.hpp
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template <class T>
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struct remove_RC
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{
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typedef typename boost::remove_reference<T>::type TT;
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typedef typename boost::remove_const<TT>::type type;
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};
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struct XId
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0>
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struct result<This(A0)>
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: boost::remove_reference<A0>
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{};
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template <typename A0>
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A0 operator()(A0 const & a0) const
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{
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return a0;
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}
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};
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}
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typedef boost::phoenix::function<impl::XId> Id;
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Id id;
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#ifdef BOOST_RESULT_OF_USE_TR1
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// Experiment following examples in
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// phoenix/stl/container/container.hpp
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namespace result_of {
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template <
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typename Arg1
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, typename Arg2
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>
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class make_pair
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{
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public:
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typedef typename impl::remove_RC<Arg1>::type Arg1Type;
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typedef typename impl::remove_RC<Arg2>::type Arg2Type;
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typedef std::pair<Arg1Type,Arg2Type> type;
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typedef std::pair<Arg1Type,Arg2Type> result_type;
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};
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}
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#endif
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namespace impl
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{
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struct XMake_pair {
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#ifdef BOOST_RESULT_OF_USE_TR1
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template <typename Sig>
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struct result;
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// This fails with -O2 unless refs are removed from A1 and A2.
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template <typename This, typename A0, typename A1>
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struct result<This(A0, A1)>
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{
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typedef typename result_of::make_pair<A0,A1>::type type;
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};
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#else
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0, A1)>
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: boost::remove_reference<std::pair<A0, A1> >
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{};
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#endif
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template <typename A0, typename A1>
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#ifdef BOOST_RESULT_OF_USE_TR1
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typename result<XMake_pair(A0,A1)>::type
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#else
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std::pair<A0, A1>
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#endif
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operator()(A0 const & a0, A1 const & a1) const
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{
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return std::make_pair(a0,a1);
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}
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};
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}
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typedef boost::phoenix::function<impl::XMake_pair> Make_pair;
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Make_pair make_pair;
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namespace impl
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{
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// For now I will leave the return type deduction as it is.
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// I want to look at bringing in the sort of type deduction for
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// mixed types which I have in FC++.
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// Also I could look at the case where one of the arguments is
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// another functor or a Phoenix placeholder.
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struct XPlus
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0, A1)>
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: boost::remove_reference<A0>
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{};
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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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: boost::remove_reference<A0>
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{};
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template <typename A0, typename A1>
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A0 operator()(A0 const & a0, A1 const & a1) const
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{
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//A0 res = a0 + a1;
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//return res;
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return a0 + a1;
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}
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template <typename A0, typename A1, typename A2>
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A0 operator()(A0 const & a0, A1 const & a1, A2 const & a2) const
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{
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return a0 + a1 + a2;
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}
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};
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struct XMinus
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0, A1)>
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: boost::remove_reference<A0>
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{};
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template <typename A0, typename A1>
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A0 operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 - a1;
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}
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};
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struct XMultiplies
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0, A1)>
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: boost::remove_reference<A0>
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{};
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template <typename A0, typename A1>
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A0 operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 * a1;
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}
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};
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struct XDivides
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0, A1)>
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: boost::remove_reference<A0>
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{};
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template <typename A0, typename A1>
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A0 operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 / a1;
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}
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};
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struct XModulus
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0, A1)>
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: boost::remove_reference<A0>
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{};
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template <typename A0, typename A1>
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A0 operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 % a1;
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}
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};
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struct XNegate
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0>
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struct result<This(A0)>
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: boost::remove_reference<A0>
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{};
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template <typename A0>
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A0 operator()(A0 const & a0) const
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{
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return -a0;
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}
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};
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struct XEqual
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0,A1)>
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{
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typedef bool type;
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};
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template <typename A0, typename A1>
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bool operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 == a1;
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}
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};
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struct XNot_equal
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0,A1)>
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{
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typedef bool type;
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};
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template <typename A0, typename A1>
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bool operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 != a1;
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}
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};
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struct XGreater
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0,A1)>
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{
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typedef bool type;
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};
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template <typename A0, typename A1>
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bool operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 > a1;
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}
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};
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struct XLess
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0,A1)>
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{
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typedef bool type;
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};
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template <typename A0, typename A1>
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bool operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 < a1;
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}
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};
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struct XGreater_equal
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0,A1)>
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{
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typedef bool type;
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};
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template <typename A0, typename A1>
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bool operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 >= a1;
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}
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};
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struct XLess_equal
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0, typename A1>
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struct result<This(A0,A1)>
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{
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typedef bool type;
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};
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template <typename A0, typename A1>
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bool operator()(A0 const & a0, A1 const & a1) const
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{
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return a0 <= a1;
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}
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};
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struct XPositive
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{
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template <typename Sig>
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struct result;
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template <typename This, typename A0>
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struct result<This(A0)>
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{
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typedef bool type;
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};
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template <typename A0>
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bool operator()(A0 const & a0) const
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{
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return a0 >= A0(0);
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}
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};
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|
|
||
|
|
struct XLogical_and
|
||
|
|
{
|
||
|
|
template <typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template <typename This, typename A0, typename A1>
|
||
|
|
struct result<This(A0,A1)>
|
||
|
|
{
|
||
|
|
typedef bool type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename A0, typename A1>
|
||
|
|
bool operator()(A0 const & a0, A1 const & a1) const
|
||
|
|
{
|
||
|
|
return a0 && a1;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct XLogical_or
|
||
|
|
{
|
||
|
|
template <typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template <typename This, typename A0, typename A1>
|
||
|
|
struct result<This(A0,A1)>
|
||
|
|
{
|
||
|
|
typedef bool type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename A0, typename A1>
|
||
|
|
bool operator()(A0 const & a0, A1 const & a1) const
|
||
|
|
{
|
||
|
|
return a0 || a1;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct XLogical_not
|
||
|
|
{
|
||
|
|
template <typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template <typename This, typename A0>
|
||
|
|
struct result<This(A0)>
|
||
|
|
{
|
||
|
|
typedef bool type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename A0>
|
||
|
|
bool operator()(A0 const & a0) const
|
||
|
|
{
|
||
|
|
return !a0;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct XMin
|
||
|
|
{
|
||
|
|
template <typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template <typename This, typename A0, typename A1>
|
||
|
|
struct result<This(A0, A1)>
|
||
|
|
: boost::remove_reference<A0>
|
||
|
|
{};
|
||
|
|
|
||
|
|
template <typename A0, typename A1>
|
||
|
|
A0 operator()(A0 const & a0, A1 const & a1) const
|
||
|
|
{
|
||
|
|
if ( a0 < a1 ) return a0; else return a1;
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
struct XMax
|
||
|
|
{
|
||
|
|
template <typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template <typename This, typename A0, typename A1>
|
||
|
|
struct result<This(A0, A1)>
|
||
|
|
: boost::remove_reference<A0>
|
||
|
|
{};
|
||
|
|
|
||
|
|
template <typename A0, typename A1>
|
||
|
|
A0 operator()(A0 const & a0, A1 const & a1) const
|
||
|
|
{
|
||
|
|
if ( a0 < a1 ) return a1; else return a0;
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
struct XInc
|
||
|
|
{
|
||
|
|
template <typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template <typename This, typename A0>
|
||
|
|
struct result<This(A0)>
|
||
|
|
: boost::remove_reference<A0>
|
||
|
|
{};
|
||
|
|
|
||
|
|
template <typename A0>
|
||
|
|
A0 operator()(A0 const & a0) const
|
||
|
|
{
|
||
|
|
return a0 + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
struct XDec
|
||
|
|
{
|
||
|
|
template <typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template <typename This, typename A0>
|
||
|
|
struct result<This(A0)>
|
||
|
|
: boost::remove_reference<A0>
|
||
|
|
{};
|
||
|
|
|
||
|
|
template <typename A0>
|
||
|
|
A0 operator()(A0 const & a0) const
|
||
|
|
{
|
||
|
|
return a0 - 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
struct XSin
|
||
|
|
{
|
||
|
|
template <typename Sig>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template <typename This, typename A0>
|
||
|
|
struct result<This(A0)>
|
||
|
|
: boost::remove_reference<A0>
|
||
|
|
{};
|
||
|
|
|
||
|
|
template <typename A0>
|
||
|
|
A0 operator()(A0 const & a0) const
|
||
|
|
{
|
||
|
|
return std::sin(a0);
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
// Example of templated struct.
|
||
|
|
// How do I make it callable?
|
||
|
|
template <typename Result>
|
||
|
|
struct what {
|
||
|
|
|
||
|
|
typedef Result result_type;
|
||
|
|
|
||
|
|
Result operator()(Result const & r) const
|
||
|
|
{
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
// what is not complete - error.
|
||
|
|
//static boost::function1<Result,Result> res = what<Result>();
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Result>
|
||
|
|
struct what0 {
|
||
|
|
|
||
|
|
typedef Result result_type;
|
||
|
|
|
||
|
|
Result operator()() const
|
||
|
|
{
|
||
|
|
return Result(100);
|
||
|
|
}
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template <class Result, class F>
|
||
|
|
class MonomorphicWrapper0 /* : public c_fun_type<Res> */
|
||
|
|
{
|
||
|
|
F f;
|
||
|
|
public:
|
||
|
|
typedef Result result_type;
|
||
|
|
MonomorphicWrapper0( const F& g ) : f(g) {}
|
||
|
|
Result operator()() const {
|
||
|
|
return f();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
/////////////////////////////////////////////////////////
|
||
|
|
// Look at this. How to use Phoenix with a templated
|
||
|
|
// struct. First adapt with boost::function and then
|
||
|
|
// convert that to Phoenix!!
|
||
|
|
// I have not found out how to do it directly.
|
||
|
|
/////////////////////////////////////////////////////////
|
||
|
|
boost::function1<int, int > what_int = impl::what<int>();
|
||
|
|
typedef boost::function1<int,int> fun1_int_int;
|
||
|
|
typedef boost::function0<int> fun0_int;
|
||
|
|
boost::function0<int> what0_int = impl::what0<int>();
|
||
|
|
BOOST_PHOENIX_ADAPT_FUNCTION(int,what,what_int,1)
|
||
|
|
BOOST_PHOENIX_ADAPT_FUNCTION_NULLARY(int,what0,what0_int)
|
||
|
|
// And this shows how to make them into argument callable functions.
|
||
|
|
typedef boost::phoenix::function<fun1_int_int> What_arg;
|
||
|
|
typedef boost::phoenix::function<fun0_int> What0_arg;
|
||
|
|
What_arg what_arg(what_int);
|
||
|
|
What0_arg what0_arg(what0_int);
|
||
|
|
|
||
|
|
|
||
|
|
// To use these as arguments they have to be defined like this.
|
||
|
|
typedef boost::phoenix::function<impl::XPlus> Plus;
|
||
|
|
typedef boost::phoenix::function<impl::XMinus> Minus;
|
||
|
|
typedef boost::phoenix::function<impl::XMultiplies> Multiplies;
|
||
|
|
typedef boost::phoenix::function<impl::XDivides> Divides;
|
||
|
|
typedef boost::phoenix::function<impl::XModulus> Modulus;
|
||
|
|
typedef boost::phoenix::function<impl::XNegate> Negate;
|
||
|
|
typedef boost::phoenix::function<impl::XEqual> Equal;
|
||
|
|
typedef boost::phoenix::function<impl::XNot_equal> Not_equal;
|
||
|
|
typedef boost::phoenix::function<impl::XGreater> Greater;
|
||
|
|
typedef boost::phoenix::function<impl::XLess> Less;
|
||
|
|
typedef boost::phoenix::function<impl::XGreater_equal> Greater_equal;
|
||
|
|
typedef boost::phoenix::function<impl::XLess_equal> Less_equal;
|
||
|
|
typedef boost::phoenix::function<impl::XPositive> Positive;
|
||
|
|
typedef boost::phoenix::function<impl::XLogical_and> Logical_and;
|
||
|
|
typedef boost::phoenix::function<impl::XLogical_or> Logical_or;
|
||
|
|
typedef boost::phoenix::function<impl::XLogical_not> Logical_not;
|
||
|
|
typedef boost::phoenix::function<impl::XMax> Max;
|
||
|
|
typedef boost::phoenix::function<impl::XMin> Min;
|
||
|
|
typedef boost::phoenix::function<impl::XInc> Inc;
|
||
|
|
typedef boost::phoenix::function<impl::XDec> Dec;
|
||
|
|
typedef boost::phoenix::function<impl::XSin> Sin;
|
||
|
|
Plus plus;
|
||
|
|
Minus minus;
|
||
|
|
Multiplies multiplies;
|
||
|
|
Divides divides;
|
||
|
|
Modulus modulus;
|
||
|
|
Negate negate;
|
||
|
|
Equal equal;
|
||
|
|
Not_equal not_equal;
|
||
|
|
Greater greater;
|
||
|
|
Less less;
|
||
|
|
Greater_equal greater_equal;
|
||
|
|
Less_equal less_equal;
|
||
|
|
Positive positive;
|
||
|
|
Logical_and logical_and;
|
||
|
|
Logical_or logical_or;
|
||
|
|
Logical_not logical_not;
|
||
|
|
Max max;
|
||
|
|
Min min;
|
||
|
|
Inc inc;
|
||
|
|
Dec dec;
|
||
|
|
Sin sin;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|