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75 lines
2.6 KiB
75 lines
2.6 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Joel de Guzman |
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Copyright (c) 2009 Francois Barel |
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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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==============================================================================*/ |
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#if !defined(BOOST_SPIRIT_PARAMETERIZED_AUGUST_09_2009_0539AM) |
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#define BOOST_SPIRIT_PARAMETERIZED_AUGUST_09_2009_0539AM |
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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/ref.hpp> |
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#include <boost/spirit/home/support/handles_container.hpp> |
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#include <boost/spirit/home/qi/parser.hpp> |
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namespace boost { namespace spirit { namespace qi |
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{ |
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/////////////////////////////////////////////////////////////////////////// |
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// parameterized_nonterminal: parser representing the invocation of a |
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// nonterminal, passing inherited attributes |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename Subject, typename Params> |
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struct parameterized_nonterminal |
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: parser<parameterized_nonterminal<Subject, Params> > |
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{ |
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parameterized_nonterminal(Subject const& subject, Params const& params) |
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: ref(subject), params(params) |
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{ |
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} |
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template <typename Context, typename Iterator> |
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struct attribute |
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// Forward to subject. |
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: Subject::template attribute<Context, Iterator> {}; |
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template <typename Iterator, typename Context |
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, typename Skipper, typename Attribute> |
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bool parse(Iterator& first, Iterator const& last |
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, Context& context, Skipper const& skipper |
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, Attribute& attr) const |
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{ |
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// Forward to subject, passing the additional |
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// params argument to parse. |
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return ref.get().parse(first, last, context, skipper, attr, params); |
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} |
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template <typename Context> |
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info what(Context& context) const |
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{ |
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// Forward to subject. |
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return ref.get().what(context); |
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} |
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boost::reference_wrapper<Subject const> ref; |
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Params params; |
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}; |
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}}} |
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namespace boost { namespace spirit { namespace traits |
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{ |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename Subject, typename Params, typename Attribute |
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, typename Context, typename Iterator> |
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struct handles_container<qi::parameterized_nonterminal<Subject, Params> |
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, Attribute, Context, Iterator> |
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: handles_container<typename remove_const<Subject>::type |
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, Attribute, Context, Iterator> |
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{}; |
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}}} |
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#endif
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