| 1 | /*============================================================================= |
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| 2 | Copyright (c) 1998-2003 Joel de Guzman |
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| 3 | Copyright (c) 2001 Daniel Nuffer |
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| 4 | Copyright (c) 2002 Hartmut Kaiser |
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| 5 | http://spirit.sourceforge.net/ |
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| 6 | |
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| 7 | Use, modification and distribution is subject to the Boost Software |
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| 8 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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| 9 | http://www.boost.org/LICENSE_1_0.txt) |
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| 10 | =============================================================================*/ |
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| 11 | #if !defined(BOOST_SPIRIT_OPTIONAL_IPP) |
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| 12 | #define BOOST_SPIRIT_OPTIONAL_IPP |
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| 13 | |
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| 14 | namespace boost { namespace spirit { |
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| 15 | |
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| 16 | BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN |
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| 17 | |
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| 18 | /////////////////////////////////////////////////////////////////////////// |
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| 19 | // |
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| 20 | // optional class implementation |
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| 21 | // |
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| 22 | /////////////////////////////////////////////////////////////////////////// |
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| 23 | template <typename S> |
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| 24 | optional<S> |
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| 25 | operator!(parser<S> const& a) |
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| 26 | { |
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| 27 | return optional<S>(a.derived()); |
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| 28 | } |
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| 29 | |
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| 30 | BOOST_SPIRIT_CLASSIC_NAMESPACE_END |
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| 31 | |
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| 32 | }} // namespace boost::spirit |
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| 33 | |
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| 34 | #endif |
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| 35 | |
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