boost/log/expressions/predicates/matches.hpp
/*
* Copyright Andrey Semashev 2007 - 2015.
* 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)
*/
/*!
* \file matches.hpp
* \author Andrey Semashev
* \date 02.09.2012
*
* The header contains implementation of a \c matches predicate in template expressions.
*/
#ifndef BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_
#define BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_
#include <boost/phoenix/core/actor.hpp>
#include <boost/log/detail/config.hpp>
#include <boost/log/detail/unary_function_terminal.hpp>
#include <boost/log/detail/attribute_predicate.hpp>
#include <boost/log/expressions/attr_fwd.hpp>
#include <boost/log/expressions/keyword_fwd.hpp>
#include <boost/log/attributes/attribute_name.hpp>
#include <boost/log/attributes/fallback_policy.hpp>
#include <boost/log/utility/functional/matches.hpp>
#include <boost/log/detail/header.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
namespace expressions {
/*!
* The predicate checks if the attribute value matches a regular expression. The attribute value is assumed to be of a string type.
*/
template< typename T, typename RegexT, typename FallbackPolicyT = fallback_to_none >
class attribute_matches :
public aux::attribute_predicate< T, typename boost::log::aux::match_traits< RegexT >::compiled_type, matches_fun, FallbackPolicyT >
{
typedef aux::attribute_predicate< T, typename boost::log::aux::match_traits< RegexT >::compiled_type, matches_fun, FallbackPolicyT > base_type;
public:
/*!
* Initializing constructor
*
* \param name Attribute name
* \param rex The regular expression to match the attribute value against
*/
attribute_matches(attribute_name const& name, RegexT const& rex) : base_type(name, boost::log::aux::match_traits< RegexT >::compile(rex))
{
}
/*!
* Initializing constructor
*
* \param name Attribute name
* \param rex The regular expression to match the attribute value against
* \param arg Additional parameter for the fallback policy
*/
template< typename U >
attribute_matches(attribute_name const& name, RegexT const& rex, U const& arg) : base_type(name, boost::log::aux::match_traits< RegexT >::compile(rex), arg)
{
}
};
#if defined(BOOST_MSVC) && BOOST_MSVC == 1925
// MSVC 14.2 has a codegen bug that makes inlined `matches` functions below crash on copy constructing the phoenix::actor on return.
// https://developercommunity.visualstudio.com/content/problem/982738/bad-code-generated-in-boostlogboostregex-test-case.html
#define BOOST_LOG_AUX_FORCEINLINE_MSVC_BUG982738 inline BOOST_NOINLINE
#else
#define BOOST_LOG_AUX_FORCEINLINE_MSVC_BUG982738 BOOST_FORCEINLINE
#endif
/*!
* The function generates a terminal node in a template expression. The node will check if the attribute value,
* which is assumed to be a string, matches the specified regular expression.
*/
template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename RegexT >
BOOST_LOG_AUX_FORCEINLINE_MSVC_BUG982738 ActorT< aux::unary_function_terminal< attribute_matches< T, RegexT, FallbackPolicyT > > >
matches(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& attr, RegexT const& rex)
{
typedef aux::unary_function_terminal< attribute_matches< T, RegexT, FallbackPolicyT > > terminal_type;
ActorT< terminal_type > act = {{ terminal_type(attr.get_name(), rex, attr.get_fallback_policy()) }};
return act;
}
/*!
* The function generates a terminal node in a template expression. The node will check if the attribute value,
* which is assumed to be a string, matches the specified regular expression.
*/
template< typename DescriptorT, template< typename > class ActorT, typename RegexT >
BOOST_LOG_AUX_FORCEINLINE_MSVC_BUG982738 ActorT< aux::unary_function_terminal< attribute_matches< typename DescriptorT::value_type, RegexT > > >
matches(attribute_keyword< DescriptorT, ActorT > const&, RegexT const& rex)
{
typedef aux::unary_function_terminal< attribute_matches< typename DescriptorT::value_type, RegexT > > terminal_type;
ActorT< terminal_type > act = {{ terminal_type(DescriptorT::get_name(), rex) }};
return act;
}
/*!
* The function generates a terminal node in a template expression. The node will check if the attribute value,
* which is assumed to be a string, matches the specified regular expression.
*/
template< typename T, typename RegexT >
BOOST_LOG_AUX_FORCEINLINE_MSVC_BUG982738 phoenix::actor< aux::unary_function_terminal< attribute_matches< T, RegexT > > >
matches(attribute_name const& name, RegexT const& rex)
{
typedef aux::unary_function_terminal< attribute_matches< T, RegexT > > terminal_type;
phoenix::actor< terminal_type > act = {{ terminal_type(name, rex) }};
return act;
}
#undef BOOST_LOG_AUX_FORCEINLINE_MSVC_BUG982738
} // namespace expressions
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#include <boost/log/detail/footer.hpp>
#endif // BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_