35 lines
1.1 KiB
Plaintext
35 lines
1.1 KiB
Plaintext
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/*=============================================================================
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Copyright (c) 1998-2003 Joel de Guzman
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Copyright (c) 2001 Daniel Nuffer
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Copyright (c) 2002 Hartmut Kaiser
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http://spirit.sourceforge.net/
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Use, modification and distribution is subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#if !defined(BOOST_SPIRIT_OPTIONAL_IPP)
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#define BOOST_SPIRIT_OPTIONAL_IPP
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namespace boost { namespace spirit {
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BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
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///////////////////////////////////////////////////////////////////////////
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//
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// optional class implementation
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//
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///////////////////////////////////////////////////////////////////////////
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template <typename S>
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optional<S>
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operator!(parser<S> const& a)
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{
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return optional<S>(a.derived());
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}
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BOOST_SPIRIT_CLASSIC_NAMESPACE_END
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}} // namespace boost::spirit
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#endif
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