projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // as_marker.hpp | |
| 3 | // | |
| 4 | // Copyright 2008 Eric Niebler. Distributed under the Boost | |
| 5 | // Software License, Version 1.0. (See accompanying file | |
| 6 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 7 | ||
| 8 | #ifndef BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_MARKER_HPP_EAN_04_01_2007 | |
| 9 | #define BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_MARKER_HPP_EAN_04_01_2007 | |
| 10 | ||
| 11 | // MS compatible compilers support #pragma once | |
| 12 | #if defined(_MSC_VER) | |
| 13 | # pragma once | |
| 14 | #endif | |
| 15 | ||
| 16 | #include <boost/xpressive/detail/detail_fwd.hpp> | |
| 17 | #include <boost/xpressive/detail/static/static.hpp> | |
| 18 | #include <boost/proto/core.hpp> | |
| 19 | ||
| 20 | namespace boost { namespace xpressive { namespace grammar_detail | |
| 21 | { | |
| 22 | ||
| 23 | /////////////////////////////////////////////////////////////////////////////// | |
| 24 | // as_marker | |
| 25 | // Insert mark tags before and after the expression | |
| 26 | struct as_marker : proto::transform<as_marker> | |
| 27 | { | |
| 28 | template<typename Expr, typename State, typename Data> | |
| 29 | struct impl : proto::transform_impl<Expr, State, Data> | |
| 30 | { | |
| 31 | typedef | |
| 32 | typename shift_right< | |
| 33 | terminal<detail::mark_begin_matcher>::type | |
| 34 | , typename shift_right< | |
| 35 | typename proto::result_of::right<typename impl::expr>::type | |
| 36 | , terminal<detail::mark_end_matcher>::type | |
| 37 | >::type | |
| 38 | >::type | |
| 39 | result_type; | |
| 40 | ||
| 41 | result_type operator ()( | |
| 42 | typename impl::expr_param expr | |
| 43 | , typename impl::state_param | |
| 44 | , typename impl::data_param | |
| 45 | ) const | |
| 46 | { | |
| 47 | int mark_nbr = detail::get_mark_number(proto::left(expr)); | |
| 48 | detail::mark_begin_matcher begin(mark_nbr); | |
| 49 | detail::mark_end_matcher end(mark_nbr); | |
| 50 | ||
| 51 | result_type that = {{begin}, {proto::right(expr), {end}}}; | |
| 52 | return that; | |
| 53 | } | |
| 54 | }; | |
| 55 | }; | |
| 56 | }}} | |
| 57 | ||
| 58 | #endif |