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Diffstat (limited to 'boost/metaparse/v1/impl/iterate_impl.hpp')
| -rw-r--r-- | boost/metaparse/v1/impl/iterate_impl.hpp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/boost/metaparse/v1/impl/iterate_impl.hpp b/boost/metaparse/v1/impl/iterate_impl.hpp new file mode 100644 index 0000000000..f12be9edf6 --- /dev/null +++ b/boost/metaparse/v1/impl/iterate_impl.hpp @@ -0,0 +1,46 @@ +#ifndef BOOST_METAPARSE_V1_IMPL_ITERATE_IMPL_HPP +#define BOOST_METAPARSE_V1_IMPL_ITERATE_IMPL_HPP + +// Copyright Abel Sinkovics (abel@sinkovics.hu) 2013. +// 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) + +#include <boost/metaparse/v1/impl/iterate_impl_unchecked.hpp> +#include <boost/metaparse/v1/return_.hpp> +#include <boost/metaparse/v1/is_error.hpp> + +#include <boost/mpl/eval_if.hpp> + +namespace boost +{ + namespace metaparse + { + namespace v1 + { + namespace impl + { + template <int N, class P, class Accum> + struct iterate_impl + { + typedef iterate_impl type; + + template <class S, class Pos> + struct apply : + boost::mpl::eval_if< + typename is_error<typename P::template apply<S, Pos> >::type, + typename P::template apply<S, Pos>, + iterate_impl_unchecked<N, P, Accum, S, Pos> + > + {}; + }; + + template <class P, class Accum> + struct iterate_impl<0, P, Accum> : return_<Accum> {}; + } + } + } +} + +#endif + |