You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
112 lines
3.4 KiB
112 lines
3.4 KiB
3 years ago
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
// attr_matcher.hpp
|
||
|
|
//
|
||
|
|
// Copyright 2008 Eric Niebler.
|
||
|
|
// Copyright 2008 David Jenkins.
|
||
|
|
//
|
||
|
|
// 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)
|
||
|
|
|
||
|
|
#ifndef BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ATTR_MATCHER_HPP_EAN_06_09_2007
|
||
|
|
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_ATTR_MATCHER_HPP_EAN_06_09_2007
|
||
|
|
|
||
|
|
// MS compatible compilers support #pragma once
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
# pragma once
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <boost/xpressive/detail/detail_fwd.hpp>
|
||
|
|
#include <boost/xpressive/detail/core/quant_style.hpp>
|
||
|
|
#include <boost/xpressive/detail/core/state.hpp>
|
||
|
|
#include <boost/xpressive/detail/utility/symbols.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace xpressive { namespace detail
|
||
|
|
{
|
||
|
|
|
||
|
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
// char_translate
|
||
|
|
//
|
||
|
|
template<typename Traits, bool ICase>
|
||
|
|
struct char_translate
|
||
|
|
{
|
||
|
|
typedef typename Traits::char_type char_type;
|
||
|
|
Traits const &traits_;
|
||
|
|
|
||
|
|
explicit char_translate(Traits const &tr)
|
||
|
|
: traits_(tr)
|
||
|
|
{}
|
||
|
|
|
||
|
|
char_type operator ()(char_type ch1) const
|
||
|
|
{
|
||
|
|
return this->traits_.translate(ch1);
|
||
|
|
}
|
||
|
|
private:
|
||
|
|
char_translate &operator =(char_translate const &);
|
||
|
|
};
|
||
|
|
|
||
|
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
// char_translate
|
||
|
|
//
|
||
|
|
template<typename Traits>
|
||
|
|
struct char_translate<Traits, true>
|
||
|
|
{
|
||
|
|
typedef typename Traits::char_type char_type;
|
||
|
|
Traits const &traits_;
|
||
|
|
|
||
|
|
explicit char_translate(Traits const &tr)
|
||
|
|
: traits_(tr)
|
||
|
|
{}
|
||
|
|
|
||
|
|
char_type operator ()(char_type ch1) const
|
||
|
|
{
|
||
|
|
return this->traits_.translate_nocase(ch1);
|
||
|
|
}
|
||
|
|
private:
|
||
|
|
char_translate &operator =(char_translate const &);
|
||
|
|
};
|
||
|
|
|
||
|
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
// attr_matcher
|
||
|
|
// Note: the Matcher is a std::map
|
||
|
|
template<typename Matcher, typename Traits, typename ICase>
|
||
|
|
struct attr_matcher
|
||
|
|
: quant_style<quant_none, 0, false>
|
||
|
|
{
|
||
|
|
typedef typename Matcher::value_type::second_type const* result_type;
|
||
|
|
|
||
|
|
attr_matcher(int slot, Matcher const &matcher, Traits const& tr)
|
||
|
|
: slot_(slot-1)
|
||
|
|
{
|
||
|
|
char_translate<Traits, ICase::value> trans(tr);
|
||
|
|
this->sym_.load(matcher, trans);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename BidiIter, typename Next>
|
||
|
|
bool match(match_state<BidiIter> &state, Next const &next) const
|
||
|
|
{
|
||
|
|
BidiIter tmp = state.cur_;
|
||
|
|
char_translate<Traits, ICase::value> trans(traits_cast<Traits>(state));
|
||
|
|
result_type const &result = this->sym_(state.cur_, state.end_, trans);
|
||
|
|
if(result)
|
||
|
|
{
|
||
|
|
void const *old_slot = state.attr_context_.attr_slots_[this->slot_];
|
||
|
|
state.attr_context_.attr_slots_[this->slot_] = &*result;
|
||
|
|
if(next.match(state))
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
state.attr_context_.attr_slots_[this->slot_] = old_slot;
|
||
|
|
}
|
||
|
|
state.cur_ = tmp;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
int slot_;
|
||
|
|
boost::xpressive::detail::symbols<Matcher> sym_;
|
||
|
|
};
|
||
|
|
|
||
|
|
}}}
|
||
|
|
|
||
|
|
#endif
|