logical.hpp

来自「Boost provides free peer-reviewed portab」· HPP 代码 · 共 44 行

/*=============================================================================
    Copyright (c) 2001-2007 Joel de Guzman

    Distributed under the Boost Software License, Version 1.0. (See accompanying 
    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#ifndef PHOENIX_OPERATOR_LOGICAL_HPP
#define PHOENIX_OPERATOR_LOGICAL_HPP

#include <boost/spirit/home/phoenix/core/composite.hpp>
#include <boost/spirit/home/phoenix/core/compose.hpp>
#include <boost/spirit/home/phoenix/detail/type_deduction.hpp>
#include <boost/spirit/home/phoenix/operator/detail/unary_eval.hpp>
#include <boost/spirit/home/phoenix/operator/detail/unary_compose.hpp>
#include <boost/spirit/home/phoenix/operator/detail/binary_eval.hpp>
#include <boost/spirit/home/phoenix/operator/detail/binary_compose.hpp>

namespace boost { namespace phoenix
{
    struct logical_not_eval;
    struct logical_and_eval;
    struct logical_or_eval;

    BOOST_UNARY_RESULT_OF(!x, result_of_logical_not)
    BOOST_BINARY_RESULT_OF(x && y, result_of_logical_and)
    BOOST_BINARY_RESULT_OF(x || y, result_of_logical_or)

#define x a0.eval(env)
#define y a1.eval(env)

    PHOENIX_UNARY_EVAL(logical_not_eval, result_of_logical_not, !x)
    PHOENIX_BINARY_EVAL(logical_and_eval, result_of_logical_and, x && y)
    PHOENIX_BINARY_EVAL(logical_or_eval, result_of_logical_or, x || y)

    PHOENIX_UNARY_COMPOSE(logical_not_eval, !)
    PHOENIX_BINARY_COMPOSE(logical_and_eval, &&)
    PHOENIX_BINARY_COMPOSE(logical_or_eval, ||)

#undef x
#undef y
}}

#endif