// (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. // // Description : contains definition for all test tools in test toolbox // *************************************************************************** #ifndef BOOST_TEST_UTILS_LAZY_OSTREAM_HPP #define BOOST_TEST_UTILS_LAZY_OSTREAM_HPP // Boost.Test #include <boost/test/detail/config.hpp> #include <boost/test/tools/detail/print_helper.hpp> // STL #include <iosfwd> #include <boost/test/detail/suppress_warnings.hpp> //____________________________________________________________________________// // ************************************************************************** // // ************** lazy_ostream ************** // // ************************************************************************** // namespace boost { namespace unit_test { class BOOST_TEST_DECL lazy_ostream { public: virtual ~lazy_ostream() {} static lazy_ostream& instance() { return inst; } #if !defined(BOOST_EMBTC) friend std::ostream& operator<<( std::ostream& ostr, lazy_ostream const& o ) { return o( ostr ); } #else friend std::ostream& operator<<( std::ostream& ostr, lazy_ostream const& o ); #endif // access method bool empty() const { return m_empty; } // actual printing interface; to be accessed only by this class and children virtual std::ostream& operator()( std::ostream& ostr ) const { return ostr; } protected: explicit lazy_ostream( bool p_empty = true ) : m_empty( p_empty ) {} private: // Data members bool m_empty; static lazy_ostream inst; }; #if defined(BOOST_EMBTC) inline std::ostream& operator<<( std::ostream& ostr, lazy_ostream const& o ) { return o( ostr ); } #endif //____________________________________________________________________________// template<typename PrevType, typename T, typename StorageT=T const&> class lazy_ostream_impl : public lazy_ostream { public: lazy_ostream_impl( PrevType const& prev, T const& value ) : lazy_ostream( false ) , m_prev( prev ) , m_value( value ) { } std::ostream& operator()( std::ostream& ostr ) const BOOST_OVERRIDE { return m_prev(ostr) << test_tools::tt_detail::print_helper(m_value); } private: // Data members PrevType const& m_prev; StorageT m_value; }; //____________________________________________________________________________// template<typename T> inline lazy_ostream_impl<lazy_ostream,T> operator<<( lazy_ostream const& prev, T const& v ) { return lazy_ostream_impl<lazy_ostream,T>( prev, v ); } //____________________________________________________________________________// template<typename PrevPrevType, typename TPrev, typename T> inline lazy_ostream_impl<lazy_ostream_impl<PrevPrevType,TPrev>,T> operator<<( lazy_ostream_impl<PrevPrevType,TPrev> const& prev, T const& v ) { typedef lazy_ostream_impl<PrevPrevType,TPrev> PrevType; return lazy_ostream_impl<PrevType,T>( prev, v ); } //____________________________________________________________________________// #if BOOST_TEST_USE_STD_LOCALE template<typename R,typename S> inline lazy_ostream_impl<lazy_ostream,R& (BOOST_TEST_CALL_DECL *)(S&),R& (BOOST_TEST_CALL_DECL *)(S&)> operator<<( lazy_ostream const& prev, R& (BOOST_TEST_CALL_DECL *man)(S&) ) { typedef R& (BOOST_TEST_CALL_DECL * ManipType)(S&); return lazy_ostream_impl<lazy_ostream,ManipType,ManipType>( prev, man ); } //____________________________________________________________________________// template<typename PrevPrevType, typename TPrev,typename R,typename S> inline lazy_ostream_impl<lazy_ostream_impl<PrevPrevType,TPrev>,R& (BOOST_TEST_CALL_DECL *)(S&),R& (BOOST_TEST_CALL_DECL *)(S&)> operator<<( lazy_ostream_impl<PrevPrevType,TPrev> const& prev, R& (BOOST_TEST_CALL_DECL *man)(S&) ) { typedef R& (BOOST_TEST_CALL_DECL * ManipType)(S&); return lazy_ostream_impl<lazy_ostream_impl<PrevPrevType,TPrev>,ManipType,ManipType>( prev, man ); } //____________________________________________________________________________// #endif #define BOOST_TEST_LAZY_MSG( M ) (::boost::unit_test::lazy_ostream::instance() << M) } // namespace unit_test } // namespace boost #include <boost/test/detail/enable_warnings.hpp> #endif // BOOST_TEST_UTILS_LAZY_OSTREAM_HPP