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Diffstat (limited to 'boost/metaparse/v1/transform_error_message.hpp')
| -rw-r--r-- | boost/metaparse/v1/transform_error_message.hpp | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/boost/metaparse/v1/transform_error_message.hpp b/boost/metaparse/v1/transform_error_message.hpp new file mode 100644 index 0000000000..7aba6c3bcb --- /dev/null +++ b/boost/metaparse/v1/transform_error_message.hpp @@ -0,0 +1,49 @@ +#ifndef BOOST_METAPARSE_V1_TRANSFORM_ERROR_MESSAGE_HPP +#define BOOST_METAPARSE_V1_TRANSFORM_ERROR_MESSAGE_HPP + +// Copyright Abel Sinkovics (abel@sinkovics.hu) 2015. +// 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/is_error.hpp> +#include <boost/metaparse/v1/reject.hpp> +#include <boost/metaparse/v1/get_position.hpp> +#include <boost/metaparse/v1/get_message.hpp> + +#include <boost/mpl/eval_if.hpp> + +namespace boost +{ + namespace metaparse + { + namespace v1 + { + template <class P, class F> + struct transform_error_message + { + template <class R> + struct rejection : + reject< + typename F::template apply<typename get_message<R>::type>::type, + get_position<R> + > + {}; + + template <class S, class Pos> + struct apply : + boost::mpl::eval_if< + typename is_error<typename P::template apply<S, Pos> >::type, + rejection<typename P::template apply<S, Pos> >, + typename P::template apply<S, Pos> + > + {}; + + typedef transform_error_message type; + }; + } + } +} + +#endif + |