// Copyright (c) 2001-2011 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 |