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Diffstat (limited to '3rdParty/Boost/src/boost/fusion/iterator/detail/distance.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/fusion/iterator/detail/distance.hpp | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/fusion/iterator/detail/distance.hpp b/3rdParty/Boost/src/boost/fusion/iterator/detail/distance.hpp new file mode 100644 index 0000000..3994cb3 --- /dev/null +++ b/3rdParty/Boost/src/boost/fusion/iterator/detail/distance.hpp @@ -0,0 +1,64 @@ +/*============================================================================= + 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_DISTANCE_09172005_0730) +#define FUSION_DISTANCE_09172005_0730 + +#include <boost/mpl/int.hpp> +#include <boost/mpl/if.hpp> +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/next.hpp> +#include <boost/mpl/identity.hpp> +#include <boost/fusion/iterator/next.hpp> +#include <boost/fusion/iterator/equal_to.hpp> + +namespace boost { namespace fusion { namespace distance_detail +{ + // Default distance implementation, linear + // search for the Last iterator. + + template <typename First, typename Last> + struct linear_distance; + + template <typename First, typename Last> + struct next_distance + { + typedef typename + mpl::next< + typename linear_distance< + typename result_of::next<First>::type + , Last + >::type + >::type + type; + }; + + template <typename First, typename Last> + struct linear_distance + : mpl::eval_if< + result_of::equal_to<First, Last> + , mpl::identity<mpl::int_<0> > + , next_distance<First, Last> + >::type + { + typedef typename + mpl::eval_if< + result_of::equal_to<First, Last> + , mpl::identity<mpl::int_<0> > + , next_distance<First, Last> + >::type + type; + + static type + call(First const&, Last const&) + { + return type(); + } + }; + +}}} + +#endif |