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// Copyright (c) 2009 Chris Hoeppler
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#if !defined(BOOST_SPIRIT_REPOSITORY_QI_CONFIX_JUN_22_2009_1041AM)
#define BOOST_SPIRIT_REPOSITORY_QI_CONFIX_JUN_22_2009_1041AM
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/spirit/home/qi/domain.hpp>
#include <boost/spirit/home/qi/meta_compiler.hpp>
#include <boost/spirit/home/qi/auxiliary/lazy.hpp>
#include <boost/spirit/home/support/common_terminals.hpp>
#include <boost/spirit/home/support/info.hpp>
#include <boost/spirit/home/support/unused.hpp>
#include <boost/spirit/home/qi/detail/attributes.hpp>
#include <boost/spirit/repository/home/support/confix.hpp>
#include <boost/fusion/include/vector.hpp>
#include <boost/mpl/or.hpp>
///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit
{
///////////////////////////////////////////////////////////////////////////
// Enablers
///////////////////////////////////////////////////////////////////////////
// enables confix(..., ...)[]
template <typename Prefix, typename Suffix>
struct use_directive<qi::domain
, terminal_ex<repository::tag::confix, fusion::vector2<Prefix, Suffix> > >
: mpl::true_ {};
// enables *lazy* confix(..., ...)[]
template <>
struct use_lazy_directive<qi::domain, repository::tag::confix, 2>
: mpl::true_ {};
}}
///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit { namespace repository { namespace qi
{
using repository::confix_type;
using repository::confix;
///////////////////////////////////////////////////////////////////////////
// the confix() generated parser
template <typename Subject, typename Prefix, typename Suffix>
struct confix_parser
: spirit::qi::unary_parser<confix_parser<Subject, Prefix, Suffix> >
{
typedef Subject subject_type;
template <typename Context, typename Iterator>
struct attribute
: traits::attribute_of<subject_type, Context, Iterator>
{};
confix_parser(Subject const& subject, Prefix const& prefix
, Suffix const& suffix)
: subject(subject), prefix(prefix), suffix(suffix) {}
template <typename Iterator, typename Context
, typename Skipper, typename Attribute>
bool parse(Iterator& first, Iterator const& last
, Context& context, Skipper const& skipper
, Attribute& attr) const
{
Iterator iter = first;
if (!(prefix.parse(iter, last, context, skipper, unused) &&
subject.parse(iter, last, context, skipper, attr) &&
suffix.parse(iter, last, context, skipper, unused)))
{
return false;
}
first = iter;
return true;
}
template <typename Context>
info what(Context const& ctx) const
{
return info("confix", subject.what(ctx));
}
Subject subject;
Prefix prefix;
Suffix suffix;
};
}}}}
///////////////////////////////////////////////////////////////////////////////
namespace boost { namespace spirit { namespace qi
{
///////////////////////////////////////////////////////////////////////////
// Parser generators: make_xxx function (objects)
///////////////////////////////////////////////////////////////////////////
// creates confix(..., ...)[] directive
template <typename Prefix, typename Suffix, typename Subject
, typename Modifiers>
struct make_directive<
terminal_ex<repository::tag::confix, fusion::vector2<Prefix, Suffix> >
, Subject, Modifiers>
{
typedef typename
result_of::compile<qi::domain, Prefix, Modifiers>::type
prefix_type;
typedef typename
result_of::compile<qi::domain, Suffix, Modifiers>::type
suffix_type;
typedef repository::qi::confix_parser<
Subject, prefix_type, suffix_type> result_type;
template <typename Terminal>
result_type operator()(Terminal const& term, Subject const& subject
, Modifiers const& modifiers) const
{
return result_type(subject
, compile<qi::domain>(fusion::at_c<0>(term.args), modifiers)
, compile<qi::domain>(fusion::at_c<1>(term.args), modifiers));
}
};
}}}
namespace boost { namespace spirit { namespace traits
{
template <typename Subject, typename Prefix, typename Suffix>
struct has_semantic_action<
repository::qi::confix_parser<Subject, Prefix, Suffix> >
: mpl::or_<
has_semantic_action<Subject>
, has_semantic_action<Prefix>
, has_semantic_action<Suffix>
> {};
}}}
#endif
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