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/*=============================================================================
Copyright (c) 2001-2011 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
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