| /*============================================================================= | |
| Copyright (c) 2001-2006 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) | |
| ==============================================================================*/ | |
| #if !defined(FUSION_COUNT_09162005_0158) | |
| #define FUSION_COUNT_09162005_0158 | |
| #include <boost/config.hpp> | |
| #include <boost/mpl/or.hpp> | |
| #include <boost/type_traits/is_convertible.hpp> | |
| #include <boost/fusion/support/detail/access.hpp> | |
| #if defined (BOOST_MSVC) | |
| # pragma warning(push) | |
| # pragma warning (disable: 4512) // assignment operator could not be generated. | |
| #endif | |
| namespace boost { namespace fusion { namespace detail | |
| { | |
| template <bool is_convertible> | |
| struct compare_convertible; | |
| // T1 is convertible to T2 or vice versa | |
| template <> | |
| struct compare_convertible<true> | |
| { | |
| template <typename T1, typename T2> | |
| static bool | |
| call(T1 const& x, T2 const& y) | |
| { | |
| return x == y; | |
| } | |
| }; | |
| // T1 is NOT convertible to T2 NOR vice versa | |
| template <> | |
| struct compare_convertible<false> | |
| { | |
| template <typename T1, typename T2> | |
| static bool | |
| call(T1 const&, T2 const&) | |
| { | |
| return false; | |
| } | |
| }; | |
| template <typename T1> | |
| struct count_compare | |
| { | |
| typedef typename detail::call_param<T1>::type param; | |
| count_compare(param in_x) | |
| : x(in_x) {} | |
| template <typename T2> | |
| bool | |
| operator()(T2 const& y) | |
| { | |
| return | |
| compare_convertible< | |
| mpl::or_< | |
| is_convertible<T1, T2> | |
| , is_convertible<T2, T1> | |
| >::value | |
| >::call(x, y); | |
| } | |
| param x; | |
| }; | |
| }}} | |
| #if defined (BOOST_MSVC) | |
| # pragma warning(pop) | |
| #endif | |
| #endif | |