X-Git-Url: https://git.donarmstrong.com/?p=rsem.git;a=blobdiff_plain;f=boost%2Ffusion%2Fsequence%2Fintrinsic%2Fempty.hpp;fp=boost%2Ffusion%2Fsequence%2Fintrinsic%2Fempty.hpp;h=a9928ab1a10950f38a47d26b9e5a5f0342a31be1;hp=0000000000000000000000000000000000000000;hb=2d71eb92104693ca9baa5a2e1c23eeca776d8fd3;hpb=da57529b92adbb7ae74a89861cb39fb35ac7c62d diff --git a/boost/fusion/sequence/intrinsic/empty.hpp b/boost/fusion/sequence/intrinsic/empty.hpp new file mode 100644 index 0000000..a9928ab --- /dev/null +++ b/boost/fusion/sequence/intrinsic/empty.hpp @@ -0,0 +1,61 @@ +/*============================================================================= + 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_EMPTY_09162005_0335) +#define FUSION_EMPTY_09162005_0335 + +#include +#include +#include +#include + +namespace boost { namespace fusion +{ + // Special tags: + struct sequence_facade_tag; + struct mpl_sequence_tag; // mpl sequence tag + + namespace extension + { + template + struct empty_impl + { + template + struct apply + : mpl::bool_<(result_of::size::value == 0)> + {}; + }; + + template <> + struct empty_impl + { + template + struct apply : Sequence::template empty {}; + }; + + template <> + struct empty_impl; + } + + namespace result_of + { + template + struct empty + : extension::empty_impl::type>:: + template apply + {}; + } + + template + inline typename result_of::empty::type + empty(Sequence const&) + { + typedef typename result_of::empty::type result; + return result(); + } +}} + +#endif