| /*============================================================================= |
| 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 |
| |