/*============================================================================= | |
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_CORE_DETAIL_COMPOSITE_INFO_HPP | |
#define PHOENIX_CORE_DETAIL_COMPOSITE_INFO_HPP | |
#include <boost/mpl/if.hpp> | |
#include <boost/mpl/greater.hpp> | |
#include <boost/mpl/int.hpp> | |
#include <boost/spirit/home/fusion/algorithm/fold.hpp> | |
namespace boost { namespace phoenix { namespace detail | |
{ | |
struct max_nesting | |
{ | |
template <typename T, typename State> | |
struct result : | |
mpl::if_< | |
mpl::greater<typename T::nesting, State> | |
, typename T::nesting | |
, State | |
> | |
{}; | |
}; | |
template <typename ActorTuple> | |
struct compute_nesting | |
{ | |
typedef typename | |
fusion::meta::fold<ActorTuple, mpl::int_<0>, max_nesting>::type | |
type; | |
}; | |
}}} | |
#endif | |