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author | Chanho Park <chanho61.park@samsung.com> | 2014-12-11 18:55:56 +0900 |
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committer | Chanho Park <chanho61.park@samsung.com> | 2014-12-11 18:55:56 +0900 |
commit | 08c1e93fa36a49f49325a07fe91ff92c964c2b6c (patch) | |
tree | 7a7053ceb8874b28ec4b868d4c49b500008a102e /boost/log/expressions/predicates/begins_with.hpp | |
parent | bb4dd8289b351fae6b55e303f189127a394a1edd (diff) | |
download | boost-08c1e93fa36a49f49325a07fe91ff92c964c2b6c.tar.gz boost-08c1e93fa36a49f49325a07fe91ff92c964c2b6c.tar.bz2 boost-08c1e93fa36a49f49325a07fe91ff92c964c2b6c.zip |
Imported Upstream version 1.57.0upstream/1.57.0
Diffstat (limited to 'boost/log/expressions/predicates/begins_with.hpp')
-rw-r--r-- | boost/log/expressions/predicates/begins_with.hpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/boost/log/expressions/predicates/begins_with.hpp b/boost/log/expressions/predicates/begins_with.hpp new file mode 100644 index 0000000000..e837a4ac7e --- /dev/null +++ b/boost/log/expressions/predicates/begins_with.hpp @@ -0,0 +1,129 @@ +/* + * Copyright Andrey Semashev 2007 - 2014. + * 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 begins_with.hpp + * \author Andrey Semashev + * \date 02.09.2012 + * + * The header contains implementation of a \c begins_with predicate in template expressions. + */ + +#ifndef BOOST_LOG_EXPRESSIONS_PREDICATES_BEGINS_WITH_HPP_INCLUDED_ +#define BOOST_LOG_EXPRESSIONS_PREDICATES_BEGINS_WITH_HPP_INCLUDED_ + +#include <boost/phoenix/core/actor.hpp> +#include <boost/log/detail/config.hpp> +#include <boost/log/detail/embedded_string_type.hpp> +#include <boost/log/detail/unary_function_terminal.hpp> +#include <boost/log/detail/attribute_predicate.hpp> +#include <boost/log/attributes/attribute_name.hpp> +#include <boost/log/attributes/fallback_policy.hpp> +#include <boost/log/expressions/attr_fwd.hpp> +#include <boost/log/expressions/keyword_fwd.hpp> +#include <boost/log/utility/functional/begins_with.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 begins with a substring. The attribute value is assumed to be of a string type. + */ +#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) + +template< typename T, typename SubstringT, typename FallbackPolicyT = fallback_to_none > +using attribute_begins_with = aux::attribute_predicate< T, SubstringT, begins_with_fun, FallbackPolicyT >; + +#else // !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) + +template< typename T, typename SubstringT, typename FallbackPolicyT = fallback_to_none > +class attribute_begins_with : + public aux::attribute_predicate< T, SubstringT, begins_with_fun, FallbackPolicyT > +{ + typedef aux::attribute_predicate< T, SubstringT, begins_with_fun, FallbackPolicyT > base_type; + +public: + /*! + * Initializing constructor + * + * \param name Attribute name + * \param substring The expected attribute value beginning + */ + attribute_begins_with(attribute_name const& name, SubstringT const& substring) : base_type(name, substring) + { + } + + /*! + * Initializing constructor + * + * \param name Attribute name + * \param substring The expected attribute value beginning + * \param arg Additional parameter for the fallback policy + */ + template< typename U > + attribute_begins_with(attribute_name const& name, SubstringT const& substring, U const& arg) : base_type(name, substring, arg) + { + } +}; + +#endif // !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) + +/*! + * 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, begins with the specified substring. + */ +template< typename T, typename FallbackPolicyT, typename TagT, template< typename > class ActorT, typename SubstringT > +BOOST_FORCEINLINE ActorT< aux::unary_function_terminal< attribute_begins_with< T, typename boost::log::aux::make_embedded_string_type< SubstringT >::type, FallbackPolicyT > > > +begins_with(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const& attr, SubstringT const& substring) +{ + typedef aux::unary_function_terminal< attribute_begins_with< T, typename boost::log::aux::make_embedded_string_type< SubstringT >::type, FallbackPolicyT > > terminal_type; + ActorT< terminal_type > act = {{ terminal_type(attr.get_name(), substring, 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, begins with the specified substring. + */ +template< typename DescriptorT, template< typename > class ActorT, typename SubstringT > +BOOST_FORCEINLINE ActorT< aux::unary_function_terminal< attribute_begins_with< typename DescriptorT::value_type, typename boost::log::aux::make_embedded_string_type< SubstringT >::type > > > +begins_with(attribute_keyword< DescriptorT, ActorT > const&, SubstringT const& substring) +{ + typedef aux::unary_function_terminal< attribute_begins_with< typename DescriptorT::value_type, typename boost::log::aux::make_embedded_string_type< SubstringT >::type > > terminal_type; + ActorT< terminal_type > act = {{ terminal_type(DescriptorT::get_name(), substring) }}; + 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, begins with the specified substring. + */ +template< typename T, typename SubstringT > +BOOST_FORCEINLINE phoenix::actor< aux::unary_function_terminal< attribute_begins_with< T, typename boost::log::aux::make_embedded_string_type< SubstringT >::type > > > +begins_with(attribute_name const& name, SubstringT const& substring) +{ + typedef aux::unary_function_terminal< attribute_begins_with< T, typename boost::log::aux::make_embedded_string_type< SubstringT >::type > > terminal_type; + phoenix::actor< terminal_type > act = {{ terminal_type(name, substring) }}; + return act; +} + +} // namespace expressions + +BOOST_LOG_CLOSE_NAMESPACE // namespace log + +} // namespace boost + +#include <boost/log/detail/footer.hpp> + +#endif // BOOST_LOG_EXPRESSIONS_PREDICATES_BEGINS_WITH_HPP_INCLUDED_ |