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Diffstat (limited to '3rdParty/Boost/src/boost/fusion/iterator/mpl/convert_iterator.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/fusion/iterator/mpl/convert_iterator.hpp | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/fusion/iterator/mpl/convert_iterator.hpp b/3rdParty/Boost/src/boost/fusion/iterator/mpl/convert_iterator.hpp new file mode 100644 index 0000000..dd52d4c --- /dev/null +++ b/3rdParty/Boost/src/boost/fusion/iterator/mpl/convert_iterator.hpp @@ -0,0 +1,58 @@ +/*============================================================================= + 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_CONVERT_ITERATOR_05062005_1218) +#define FUSION_CONVERT_ITERATOR_05062005_1218 + +#include <boost/fusion/support/is_iterator.hpp> +#include <boost/mpl/if.hpp> +#include <boost/mpl/bool.hpp> + +namespace boost { namespace fusion +{ + template <typename Iterator> + struct mpl_iterator; // forward declaration + + // Test T. If it is a fusion iterator, return a reference to it. + // else, assume it is an mpl iterator. + + template <typename T> + struct convert_iterator + { + typedef typename + mpl::if_< + is_fusion_iterator<T> + , T + , mpl_iterator<T> + >::type + type; + + static T const& + call(T const& x, mpl::true_) + { + return x; + } + + static mpl_iterator<T> + call(T const& /*x*/, mpl::false_) + { + return mpl_iterator<T>(); + } + + static typename + mpl::if_< + is_fusion_iterator<T> + , T const& + , mpl_iterator<T> + >::type + call(T const& x) + { + return call(x, is_fusion_iterator<T>()); + } + }; +}} + +#endif |