71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
|
/*==============================================================================
|
||
|
|
Copyright (c) 2001-2010 Joel de Guzman
|
||
|
|
Copyright (c) 2010 Thomas Heller
|
||
|
|
|
||
|
|
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 BOOST_PHOENIX_STATEMENT_WHILE_HPP
|
||
|
|
#define BOOST_PHOENIX_STATEMENT_WHILE_HPP
|
||
|
|
|
||
|
|
#include <boost/phoenix/core/limits.hpp>
|
||
|
|
#include <boost/phoenix/core/call.hpp>
|
||
|
|
#include <boost/phoenix/core/expression.hpp>
|
||
|
|
#include <boost/phoenix/core/meta_grammar.hpp>
|
||
|
|
|
||
|
|
BOOST_PHOENIX_DEFINE_EXPRESSION(
|
||
|
|
(boost)(phoenix)(while_)
|
||
|
|
, (meta_grammar) // Cond
|
||
|
|
(meta_grammar) // Do
|
||
|
|
)
|
||
|
|
|
||
|
|
namespace boost { namespace phoenix
|
||
|
|
{
|
||
|
|
struct while_eval
|
||
|
|
{
|
||
|
|
typedef void result_type;
|
||
|
|
|
||
|
|
template <typename Cond, typename Do, typename Context>
|
||
|
|
result_type
|
||
|
|
operator()(Cond const& cond, Do const& do_it, Context const & ctx) const
|
||
|
|
{
|
||
|
|
while(boost::phoenix::eval(cond, ctx))
|
||
|
|
{
|
||
|
|
boost::phoenix::eval(do_it, ctx);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Dummy>
|
||
|
|
struct default_actions::when<rule::while_, Dummy>
|
||
|
|
: call<while_eval, Dummy>
|
||
|
|
{};
|
||
|
|
|
||
|
|
template <typename Cond>
|
||
|
|
struct while_gen
|
||
|
|
{
|
||
|
|
while_gen(Cond const& cond_) : cond(cond_) {}
|
||
|
|
|
||
|
|
template <typename Do>
|
||
|
|
typename expression::while_<Cond, Do>::type const
|
||
|
|
operator[](Do const& do_it) const
|
||
|
|
{
|
||
|
|
return expression::while_<Cond, Do>::make(cond, do_it);
|
||
|
|
}
|
||
|
|
|
||
|
|
Cond const& cond;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Cond>
|
||
|
|
inline
|
||
|
|
while_gen<Cond> const
|
||
|
|
while_(Cond const& cond)
|
||
|
|
{
|
||
|
|
return while_gen<Cond>(cond);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
}}
|
||
|
|
|
||
|
|
#endif
|