129 lines
4.7 KiB
C++
129 lines
4.7 KiB
C++
/*
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* Copyright Andrey Semashev 2007 - 2013.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file matches.hpp
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* \author Andrey Semashev
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* \date 02.09.2012
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*
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* The header contains implementation of a \c matches predicate in template expressions.
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*/
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#ifndef BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_
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#define BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_
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#include <boost/phoenix/core/actor.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/detail/unary_function_terminal.hpp>
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#include <boost/log/detail/attribute_predicate.hpp>
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#include <boost/log/expressions/attr_fwd.hpp>
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#include <boost/log/expressions/keyword_fwd.hpp>
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#include <boost/log/attributes/attribute_name.hpp>
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#include <boost/log/attributes/fallback_policy.hpp>
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#include <boost/log/utility/functional/matches.hpp>
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace expressions {
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/*!
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* The predicate checks if the attribute value matches a regular expression. The attribute value is assumed to be of a string type.
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*/
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#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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template< typename T, typename RegexT, typename FallbackPolicyT = fallback_to_none >
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using attribute_matches = aux::attribute_predicate< T, RegexT, matches_fun, FallbackPolicyT >;
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#else // !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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template< typename T, typename RegexT, typename FallbackPolicyT = fallback_to_none >
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class attribute_matches :
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public aux::attribute_predicate< T, RegexT, matches_fun, FallbackPolicyT >
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{
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typedef aux::attribute_predicate< T, RegexT, matches_fun, FallbackPolicyT > base_type;
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public:
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/*!
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* Initializing constructor
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*
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* \param name Attribute name
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* \param rex The regular expression to match the attribute value against
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*/
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attribute_matches(attribute_name const& name, RegexT const& rex) : base_type(name, rex)
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{
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}
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/*!
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* Initializing constructor
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*
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* \param name Attribute name
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* \param rex The regular expression to match the attribute value against
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* \param arg Additional parameter for the fallback policy
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*/
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template< typename U >
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attribute_matches(attribute_name const& name, RegexT const& rex, U const& arg) : base_type(name, rex, arg)
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{
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}
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};
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#endif // !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
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/*!
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* The function generates a terminal node in a template expression. The node will check if the attribute value,
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* which is assumed to be a string, matches the specified regular expression.
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*/
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template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename RegexT >
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BOOST_FORCEINLINE ActorT< aux::unary_function_terminal< attribute_matches< T, RegexT, FallbackPolicyT > > >
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matches(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& attr, RegexT const& rex)
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{
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typedef aux::unary_function_terminal< attribute_matches< T, RegexT, FallbackPolicyT > > terminal_type;
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ActorT< terminal_type > act = {{ terminal_type(attr.get_name(), rex, attr.get_fallback_policy()) }};
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return act;
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}
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/*!
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* The function generates a terminal node in a template expression. The node will check if the attribute value,
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* which is assumed to be a string, matches the specified regular expression.
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*/
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template< typename DescriptorT, template< typename > class ActorT, typename RegexT >
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BOOST_FORCEINLINE ActorT< aux::unary_function_terminal< attribute_matches< typename DescriptorT::value_type, RegexT > > >
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matches(attribute_keyword< DescriptorT, ActorT > const&, RegexT const& rex)
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{
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typedef aux::unary_function_terminal< attribute_matches< typename DescriptorT::value_type, RegexT > > terminal_type;
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ActorT< terminal_type > act = {{ terminal_type(DescriptorT::get_name(), rex) }};
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return act;
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}
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/*!
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* The function generates a terminal node in a template expression. The node will check if the attribute value,
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* which is assumed to be a string, matches the specified regular expression.
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*/
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template< typename T, typename RegexT >
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BOOST_FORCEINLINE phoenix::actor< aux::unary_function_terminal< attribute_matches< T, RegexT > > >
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matches(attribute_name const& name, RegexT const& rex)
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{
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typedef aux::unary_function_terminal< attribute_matches< T, RegexT > > terminal_type;
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phoenix::actor< terminal_type > act = {{ terminal_type(name, rex) }};
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return act;
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}
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} // namespace expressions
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_EXPRESSIONS_PREDICATES_MATCHES_HPP_INCLUDED_
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