/usr/include/boost/xpressive/detail/core/matcher
Edit: /usr/include/boost/xpressive/detail/core/matcher/regex_byref_matcher.hpp (2760B)
///////////////////////////////////////////////////////////////////////////////
// regex_byref_matcher.hpp
//
// Copyright 2008 Eric Niebler. 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_REGEX_BYREF_MATCHER_HPP_EAN_10_04_2005
#define BOOST_XPRESSIVE_DETAIL_CORE_MATCHER_REGEX_BYREF_MATCHER_HPP_EAN_10_04_2005
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
namespace boost { namespace xpressive { namespace detail
{
///////////////////////////////////////////////////////////////////////////////
// regex_byref_matcher
//
template
struct regex_byref_matcher
: quant_style
{
// avoid cyclic references by holding a weak_ptr to the
// regex_impl struct
weak_ptr > wimpl_;
// the basic_regex object holds a ref-count to this regex_impl, so
// we don't have to worry about it going away.
regex_impl const *pimpl_;
regex_byref_matcher(shared_ptr > const &impl)
: wimpl_(impl)
, pimpl_(impl.get())
{
BOOST_ASSERT(this->pimpl_);
}
template
bool match(match_state &state, Next const &next) const
{
BOOST_ASSERT(this->pimpl_ == this->wimpl_.lock().get());
BOOST_XPR_ENSURE_(this->pimpl_->xpr_, regex_constants::error_badref, "bad regex reference");
return push_context_match(*this->pimpl_, state, this->wrap_(next, is_static_xpression()));
}
private:
template
static xpression_adaptor, matchable > wrap_(Next const &next, mpl::true_)
{
// wrap the static xpression in a matchable interface
return xpression_adaptor, matchable >(boost::cref(next));
}
template
static Next const &wrap_(Next const &next, mpl::false_)
{
return next;
}
};
}}}
#endif