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Editing: class_properties.hpp
// (C) Copyright Gennadiy Rozental 2001. // 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) // See http://www.boost.org/libs/test for the library home page. // // File : $RCSfile$ // // Version : $Revision$ // // Description : simple facility that mimmic notion of read-only read-write // properties in C++ classes. Original idea by Henrik Ravn. // *************************************************************************** #ifndef BOOST_TEST_UTILS_CLASS_PROPERTIES_HPP #define BOOST_TEST_UTILS_CLASS_PROPERTIES_HPP // Boost.Test #include <boost/test/detail/config.hpp> // Boost #if !BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600)) #include <boost/preprocessor/seq/for_each.hpp> #endif #include <boost/call_traits.hpp> #include <boost/type_traits/add_pointer.hpp> #include <boost/type_traits/add_const.hpp> #include <boost/utility/addressof.hpp> // STL #include <iosfwd> #include <boost/test/detail/suppress_warnings.hpp> //____________________________________________________________________________// namespace boost { namespace unit_test { // ************************************************************************** // // ************** class_property ************** // // ************************************************************************** // template<class PropertyType> class class_property { protected: typedef typename call_traits<PropertyType>::const_reference read_access_t; typedef typename call_traits<PropertyType>::param_type write_param_t; typedef typename add_pointer<typename add_const<PropertyType>::type>::type address_res_t; public: // Constructor class_property() : value( PropertyType() ) {} explicit class_property( write_param_t init_value ) : value( init_value ) {} // Access methods operator read_access_t() const { return value; } read_access_t get() const { return value; } bool operator!() const { return !value; } address_res_t operator&() const { return &value; } // Data members #ifndef BOOST_TEST_NO_PROTECTED_USING protected: #endif PropertyType value; }; //____________________________________________________________________________// #ifdef BOOST_CLASSIC_IOSTREAMS template<class PropertyType> inline std::ostream& operator<<( std::ostream& os, class_property<PropertyType> const& p ) #else template<typename CharT1, typename Tr,class PropertyType> inline std::basic_ostream<CharT1,Tr>& operator<<( std::basic_ostream<CharT1,Tr>& os, class_property<PropertyType> const& p ) #endif { return os << p.get(); } //____________________________________________________________________________// #define DEFINE_PROPERTY_FREE_BINARY_OPERATOR( op ) \ template<class PropertyType> \ inline bool \ operator op( PropertyType const& lhs, class_property<PropertyType> const& rhs ) \ { \ return lhs op rhs.get(); \ } \ template<class PropertyType> \ inline bool \ operator op( class_property<PropertyType> const& lhs, PropertyType const& rhs ) \ { \ return lhs.get() op rhs; \ } \ template<class PropertyType> \ inline bool \ operator op( class_property<PropertyType> const& lhs, \ class_property<PropertyType> const& rhs ) \ { \ return lhs.get() op rhs.get(); \ } \ /**/ DEFINE_PROPERTY_FREE_BINARY_OPERATOR( == ) DEFINE_PROPERTY_FREE_BINARY_OPERATOR( != ) #undef DEFINE_PROPERTY_FREE_BINARY_OPERATOR // ************************************************************************** // // ************** readonly_property ************** // // ************************************************************************** // template<class PropertyType> class readonly_property : public class_property<PropertyType> { typedef class_property<PropertyType> base_prop; typedef typename base_prop::address_res_t arrow_res_t; protected: typedef typename base_prop::write_param_t write_param_t; public: // Constructor readonly_property() {} explicit readonly_property( write_param_t init_value ) : base_prop( init_value ) {} // access methods arrow_res_t operator->() const { return boost::addressof( base_prop::value ); } }; //____________________________________________________________________________// #if BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600)) #define BOOST_READONLY_PROPERTY( property_type, friends ) boost::unit_test::readwrite_property<property_type > #else #define BOOST_READONLY_PROPERTY_DECLARE_FRIEND(r, data, elem) friend class elem; #define BOOST_READONLY_PROPERTY( property_type, friends ) \ class BOOST_JOIN( readonly_property, __LINE__ ) \ : public boost::unit_test::readonly_property<property_type > { \ typedef boost::unit_test::readonly_property<property_type > base_prop; \ BOOST_PP_SEQ_FOR_EACH( BOOST_READONLY_PROPERTY_DECLARE_FRIEND, ' ', friends ) \ typedef base_prop::write_param_t write_param_t; \ public: \ BOOST_JOIN( readonly_property, __LINE__ )() {} \ explicit BOOST_JOIN( readonly_property, __LINE__ )( write_param_t init_v ) \ : base_prop( init_v ) {} \ } \ /**/ #endif // ************************************************************************** // // ************** readwrite_property ************** // // ************************************************************************** // template<class PropertyType> class readwrite_property : public class_property<PropertyType> { typedef class_property<PropertyType> base_prop; typedef typename add_pointer<PropertyType>::type arrow_res_t; typedef typename base_prop::address_res_t const_arrow_res_t; typedef typename base_prop::write_param_t write_param_t; public: readwrite_property() : base_prop() {} explicit readwrite_property( write_param_t init_value ) : base_prop( init_value ) {} // access methods void set( write_param_t v ) { base_prop::value = v; } arrow_res_t operator->() { return boost::addressof( base_prop::value ); } const_arrow_res_t operator->() const { return boost::addressof( base_prop::value ); } #ifndef BOOST_TEST_NO_PROTECTED_USING using base_prop::value; #endif }; //____________________________________________________________________________// } // unit_test } // namespace boost #include <boost/test/detail/enable_warnings.hpp> #undef BOOST_TEST_NO_PROTECTED_USING #endif // BOOST_TEST_UTILS_CLASS_PROPERTIES_HPP
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