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78 lines
1.9 KiB
78 lines
1.9 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Joel de Guzman |
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Distributed under the Boost Software License, Version 1.0. (See accompanying |
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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==============================================================================*/ |
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#if !defined(FUSION_COUNT_09162005_0158) |
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#define FUSION_COUNT_09162005_0158 |
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#include <boost/config.hpp> |
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#include <boost/mpl/or.hpp> |
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#include <boost/type_traits/is_convertible.hpp> |
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#include <boost/fusion/support/detail/access.hpp> |
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#if defined (BOOST_MSVC) |
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# pragma warning(push) |
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# pragma warning (disable: 4512) // assignment operator could not be generated. |
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#endif |
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namespace boost { namespace fusion { namespace detail |
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{ |
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template <bool is_convertible> |
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struct compare_convertible; |
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// T1 is convertible to T2 or vice versa |
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template <> |
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struct compare_convertible<true> |
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{ |
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template <typename T1, typename T2> |
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static bool |
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call(T1 const& x, T2 const& y) |
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{ |
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return x == y; |
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} |
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}; |
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// T1 is NOT convertible to T2 NOR vice versa |
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template <> |
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struct compare_convertible<false> |
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{ |
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template <typename T1, typename T2> |
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static bool |
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call(T1 const&, T2 const&) |
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{ |
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return false; |
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} |
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}; |
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template <typename T1> |
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struct count_compare |
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{ |
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typedef typename detail::call_param<T1>::type param; |
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count_compare(param in_x) |
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: x(in_x) {} |
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template <typename T2> |
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bool |
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operator()(T2 const& y) |
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{ |
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return |
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compare_convertible< |
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mpl::or_< |
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is_convertible<T1, T2> |
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, is_convertible<T2, T1> |
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>::value |
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>::call(x, y); |
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} |
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param x; |
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}; |
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}}} |
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#if defined (BOOST_MSVC) |
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# pragma warning(pop) |
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#endif |
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#endif |
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