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/Src/Dependencies/Boost/boost/spirit/home/phoenix/operator/detail/binary_eval.hpp

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C++ Header | 44 lines | 35 code | 3 blank | 6 comment | 0 complexity | 6086b8fab4268f83f97358989190b144 MD5 | raw file
 1/*=============================================================================
 2    Copyright (c) 2001-2007 Joel de Guzman
 3
 4    Distributed under the Boost Software License, Version 1.0. (See accompanying 
 5    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 6==============================================================================*/
 7#ifndef PHOENIX_OPERATOR_DETAIL_BINARY_EVAL_HPP
 8#define PHOENIX_OPERATOR_DETAIL_BINARY_EVAL_HPP
 9
10#include <boost/mpl/or.hpp>
11#include <boost/mpl/eval_if.hpp>
12#include <boost/mpl/identity.hpp>
13#include <boost/type_traits/is_same.hpp>
14#include <boost/spirit/home/phoenix/core/compose.hpp>
15
16#define PHOENIX_BINARY_EVAL(eval_name, op_result, expr)                         \
17    struct eval_name                                                            \
18    {                                                                           \
19        template <typename Env, typename A0, typename A1>                       \
20        struct result                                                            \
21        {                                                                       \
22            typedef typename A0::template result<Env>::type x_type;              \
23            typedef typename A1::template result<Env>::type y_type;              \
24                                                                                \
25            typedef typename                                                    \
26                mpl::eval_if<                                                   \
27                    mpl::or_<is_actor<x_type>, is_actor<y_type> >               \
28                  , re_curry<eval_name, x_type, y_type>                         \
29                  , op_result<x_type, y_type>                                   \
30                >::type                                                         \
31            type;                                                               \
32        };                                                                      \
33                                                                                \
34        template <typename RT, typename Env, typename A0, typename A1>          \
35        static RT                                                               \
36        eval(Env const& env, A0& a0, A1& a1)                                    \
37        {                                                                       \
38            return expr;                                                        \
39        }                                                                       \
40    };
41
42#undef x
43#undef y
44#endif