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50 lines
1.4 KiB
50 lines
1.4 KiB
// Copyright (c) 2001-2011 Hartmut Kaiser |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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#if !defined(BOOST_SPIRIT_QI_UNUSED_SKIPPER_JUL_25_2009_0921AM) |
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#define BOOST_SPIRIT_QI_UNUSED_SKIPPER_JUL_25_2009_0921AM |
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#if defined(_MSC_VER) |
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#pragma once |
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#endif |
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#include <boost/spirit/home/support/unused.hpp> |
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namespace boost { namespace spirit { namespace qi { namespace detail |
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{ |
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template <typename Skipper> |
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struct unused_skipper : unused_type |
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{ |
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unused_skipper(Skipper const& skipper) |
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: skipper(skipper) {} |
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Skipper const& skipper; |
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private: |
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// silence MSVC warning C4512: assignment operator could not be generated |
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unused_skipper& operator= (unused_skipper const&); |
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}; |
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// If a surrounding lexeme[] directive was specified, the current |
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// skipper is of the type unused_skipper. In this case we |
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// re-activate the skipper which was active before the skip[] |
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// directive. |
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template <typename Skipper> |
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inline Skipper const& |
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get_skipper(unused_skipper<Skipper> const& u) |
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{ |
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return u.skipper; |
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} |
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// If no surrounding lexeme[] directive was specified we keep what we got. |
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template <typename Skipper> |
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inline Skipper const& |
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get_skipper(Skipper const& u) |
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{ |
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return u; |
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} |
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}}}} |
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#endif
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