143 lines
4.9 KiB
C++
143 lines
4.9 KiB
C++
// 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_REPOSITORY_KARMA_CONFIX_AUG_19_2008_1041AM)
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#define BOOST_SPIRIT_REPOSITORY_KARMA_CONFIX_AUG_19_2008_1041AM
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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/common_terminals.hpp>
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#include <boost/spirit/home/support/info.hpp>
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#include <boost/spirit/home/support/unused.hpp>
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#include <boost/spirit/home/karma/detail/attributes.hpp>
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#include <boost/spirit/home/karma/domain.hpp>
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#include <boost/spirit/home/karma/meta_compiler.hpp>
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#include <boost/spirit/repository/home/support/confix.hpp>
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#include <boost/fusion/include/vector.hpp>
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#include <boost/mpl/or.hpp>
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit
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{
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///////////////////////////////////////////////////////////////////////////
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// Enablers
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///////////////////////////////////////////////////////////////////////////
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// enables confix(..., ...)[]
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template <typename Prefix, typename Suffix>
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struct use_directive<karma::domain
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, terminal_ex<repository::tag::confix, fusion::vector2<Prefix, Suffix> > >
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: mpl::true_ {};
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// enables *lazy* confix(..., ...)[g]
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template <>
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struct use_lazy_directive<karma::domain, repository::tag::confix, 2>
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: mpl::true_ {};
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}}
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit { namespace repository { namespace karma
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{
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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
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using repository::confix;
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#endif
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using repository::confix_type;
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///////////////////////////////////////////////////////////////////////////
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template <typename Subject, typename Prefix, typename Suffix>
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struct confix_generator
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: spirit::karma::primitive_generator<confix_generator<Subject, Prefix, Suffix> >
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{
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typedef Subject subject_type;
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template <typename Context, typename Iterator>
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struct attribute
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: traits::attribute_of<subject_type, Context, Iterator>
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{};
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confix_generator(Subject const& subject, Prefix const& prefix
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, Suffix const& suffix)
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: subject(subject), prefix(prefix), suffix(suffix) {}
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///////////////////////////////////////////////////////////////////////
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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& ctx, Delimiter const& d
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, Attribute const& attr) const
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{
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// generate the prefix, the embedded item and the suffix
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return prefix.generate(sink, ctx, d, unused) &&
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subject.generate(sink, ctx, d, attr) &&
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suffix.generate(sink, ctx, d, unused);
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}
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template <typename Context>
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info what(Context const& ctx) const
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{
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return info("confix", subject.what(ctx));
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}
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Subject subject;
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Prefix prefix;
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Suffix suffix;
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};
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}}}}
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit { namespace karma
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{
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///////////////////////////////////////////////////////////////////////////
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// Generator generators: make_xxx function (objects)
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///////////////////////////////////////////////////////////////////////////
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// creates confix(..., ...)[] directive generator
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template <typename Prefix, typename Suffix, typename Subject
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, typename Modifiers>
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struct make_directive<
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terminal_ex<repository::tag::confix, fusion::vector2<Prefix, Suffix> >
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, Subject, Modifiers>
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{
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typedef typename
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result_of::compile<karma::domain, Prefix, Modifiers>::type
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prefix_type;
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typedef typename
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result_of::compile<karma::domain, Suffix, Modifiers>::type
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suffix_type;
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typedef repository::karma::confix_generator<
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Subject, prefix_type, suffix_type> result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, Subject const& subject
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, Modifiers const& modifiers) const
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{
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return result_type(subject
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, compile<karma::domain>(fusion::at_c<0>(term.args), modifiers)
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, compile<karma::domain>(fusion::at_c<1>(term.args), modifiers));
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}
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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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template <typename Subject, typename Prefix, typename Suffix>
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struct has_semantic_action<
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repository::karma::confix_generator<Subject, Prefix, Suffix> >
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: mpl::or_<
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has_semantic_action<Subject>
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, has_semantic_action<Prefix>
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, has_semantic_action<Suffix>
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> {};
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}}}
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#endif
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