boost/spirit/home/phoenix/statement/detail/switch_eval.hpp
/*=============================================================================
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_STATEMENT_DETAIL_SWITCH_EVAL_HPP
#define PHOENIX_STATEMENT_DETAIL_SWITCH_EVAL_HPP
namespace boost { namespace phoenix { namespace detail
{
template <int N>
struct switch_eval;
template <>
struct switch_eval<0>
{
template <
typename Env, typename Cond, typename Default
>
struct result
{
typedef void type;
};
template <
typename RT, typename Env, typename Cond, typename Default
>
static void
eval(
Env const& env, Cond& cond, Default& default_
)
{
default_.eval(env);
}
};
template <>
struct switch_eval<1>
{
template <
typename Env, typename Cond, typename Default
, typename Case0
>
struct result
{
typedef void type;
};
template <
typename RT, typename Env, typename Cond, typename Default
, typename Case0
>
static void
eval(
Env const& env, Cond& cond, Default& default_
, Case0& _0
)
{
switch (cond.eval(env))
{
case Case0::value:
_0.eval(env);
break;
default:
default_.eval(env);
}
}
};
template <>
struct switch_eval<2>
{
template <
typename Env, typename Cond, typename Default
, typename Case0, typename Case1
>
struct result
{
typedef void type;
};
template <
typename RT, typename Env, typename Cond, typename Default
, typename Case0, typename Case1
>
static void
eval(
Env const& env, Cond& cond, Default& default_
, Case0& _0, Case1& _1
)
{
switch (cond.eval(env))
{
case Case0::value:
_0.eval(env);
break;
case Case1::value:
_1.eval(env);
break;
default:
default_.eval(env);
}
}
};
// Bring in the rest of the switch_evals
#include <boost/spirit/home/phoenix/statement/detail/switch_eval.ipp>
}}}
#endif
