| // Copyright (c) 2001-2010 Hartmut Kaiser |
| // |
| // 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(BOOST_SPIRIT_QI_UNUSED_SKIPPER_JUL_25_2009_0921AM) |
| #define BOOST_SPIRIT_QI_UNUSED_SKIPPER_JUL_25_2009_0921AM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/spirit/home/support/unused.hpp> |
| |
| namespace boost { namespace spirit { namespace qi { namespace detail |
| { |
| template <typename Skipper> |
| struct unused_skipper : unused_type |
| { |
| unused_skipper(Skipper const& skipper) |
| : skipper(skipper) {} |
| Skipper const& skipper; |
| |
| private: |
| // silence MSVC warning C4512: assignment operator could not be generated |
| unused_skipper& operator= (unused_skipper const&); |
| }; |
| |
| // If a surrounding lexeme[] directive was specified, the current |
| // skipper is of the type unused_skipper. In this case we |
| // re-activate the skipper which was active before the skip[] |
| // directive. |
| template <typename Skipper> |
| inline Skipper const& |
| get_skipper(unused_skipper<Skipper> const& u) |
| { |
| return u.skipper; |
| } |
| |
| // If no surrounding lexeme[] directive was specified we keep what we got. |
| template <typename Skipper> |
| inline Skipper const& |
| get_skipper(Skipper const& u) |
| { |
| return u; |
| } |
| |
| }}}} |
| |
| #endif |