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/*=============================================================================
Copyright (c) 1998-2003 Joel de Guzman
Copyright (c) 2003 Vaclav Vesely
http://spirit.sourceforge.net/
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_NO_ACTIONS_HPP)
#define BOOST_SPIRIT_NO_ACTIONS_HPP
#include <boost/spirit/home/classic/core/parser.hpp>
#include <boost/spirit/home/classic/core/composite/composite.hpp>
#include <boost/spirit/home/classic/core/non_terminal/rule.hpp>
namespace boost {
namespace spirit {
BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
//-----------------------------------------------------------------------------
// no_actions_action_policy
template<typename BaseT = action_policy>
struct no_actions_action_policy:
public BaseT
{
typedef BaseT base_t;
no_actions_action_policy():
BaseT()
{}
template<typename PolicyT>
no_actions_action_policy(PolicyT const& other):
BaseT(other)
{}
template<typename ActorT, typename AttrT, typename IteratorT>
void
do_action(
ActorT const& /*actor*/,
AttrT& /*val*/,
IteratorT const& /*first*/,
IteratorT const& /*last*/) const
{}
};
//-----------------------------------------------------------------------------
// no_actions_scanner
namespace detail
{
template <typename ActionPolicy>
struct compute_no_actions_action_policy
{
typedef no_actions_action_policy<ActionPolicy> type;
};
template <typename ActionPolicy>
struct compute_no_actions_action_policy<no_actions_action_policy<ActionPolicy> >
{
typedef no_actions_action_policy<ActionPolicy> type;
};
}
template<typename ScannerT = scanner<> >
struct no_actions_scanner
{
typedef scanner_policies<
typename ScannerT::iteration_policy_t,
typename ScannerT::match_policy_t,
typename detail::compute_no_actions_action_policy<typename ScannerT::action_policy_t>::type
> policies_t;
typedef typename
rebind_scanner_policies<ScannerT, policies_t>::type type;
};
#if BOOST_SPIRIT_RULE_SCANNERTYPE_LIMIT > 1
template<typename ScannerT = scanner<> >
struct no_actions_scanner_list
{
typedef
scanner_list<
ScannerT,
typename no_actions_scanner<ScannerT>::type
>
type;
};
#endif // BOOST_SPIRIT_RULE_SCANNERTYPE_LIMIT > 1
//-----------------------------------------------------------------------------
// no_actions_parser
struct no_actions_parser_gen;
template<typename ParserT>
struct no_actions_parser:
public unary<ParserT, parser<no_actions_parser<ParserT> > >
{
typedef no_actions_parser<ParserT> self_t;
typedef unary_parser_category parser_category_t;
typedef no_actions_parser_gen parser_generator_t;
typedef unary<ParserT, parser<self_t> > base_t;
template<typename ScannerT>
struct result
{
typedef typename parser_result<ParserT, ScannerT>::type type;
};
no_actions_parser(ParserT const& p)
: base_t(p)
{}
template<typename ScannerT>
typename result<ScannerT>::type
parse(ScannerT const& scan) const
{
typedef typename no_actions_scanner<ScannerT>::policies_t policies_t;
return this->subject().parse(scan.change_policies(policies_t(scan)));
}
};
//-----------------------------------------------------------------------------
// no_actions_parser_gen
struct no_actions_parser_gen
{
template<typename ParserT>
struct result
{
typedef no_actions_parser<ParserT> type;
};
template<typename ParserT>
static no_actions_parser<ParserT>
generate(parser<ParserT> const& subject)
{
return no_actions_parser<ParserT>(subject.derived());
}
template<typename ParserT>
no_actions_parser<ParserT>
operator[](parser<ParserT> const& subject) const
{
return no_actions_parser<ParserT>(subject.derived());
}
};
//-----------------------------------------------------------------------------
// no_actions_d
const no_actions_parser_gen no_actions_d = no_actions_parser_gen();
//-----------------------------------------------------------------------------
BOOST_SPIRIT_CLASSIC_NAMESPACE_END
} // namespace spirit
} // namespace boost
#endif // !defined(BOOST_SPIRIT_NO_ACTIONS_HPP)
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