77 lines
2.6 KiB
C++
77 lines
2.6 KiB
C++
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// Copyright (c) 2001-2011 Joel de Guzman
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// Copyright (c) 2001-2011 Hartmut Kaiser
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// Copyright (c) 2009 Francois Barel
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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_KARMA_PARAMETERIZED_AUGUST_09_2009_0601AM)
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#define BOOST_SPIRIT_KARMA_PARAMETERIZED_AUGUST_09_2009_0601AM
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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/karma/generator.hpp>
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namespace boost { namespace spirit { namespace karma
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{
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///////////////////////////////////////////////////////////////////////////
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// parameterized_nonterminal: generator 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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: generator<parameterized_nonterminal<Subject, Params> >
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{
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typedef mpl::int_<generator_properties::all_properties> properties;
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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 Unused>
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struct attribute
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// Forward to subject.
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: Subject::template attribute<Context, Unused> {};
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template <typename OutputIterator, typename Context, typename Delimiter
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, typename Attribute>
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bool generate(OutputIterator& sink, Context& context
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, Delimiter const& delim, Attribute const& attr) const
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{
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// Forward to subject, passing the additional
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// params argument to generate.
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return ref.get().generate(sink, context, delim, 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<karma::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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