//  (C) Copyright Gennadiy Rozental 2001-2005.

 //  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: predicate_result.hpp,v $

 //

 //  Version     : $Revision: 1.7 $

 //

 //  Description : enhanced result for test predicate that include message explaining failure

 // ***************************************************************************

 #ifndef BOOST_TEST_PREDICATE_RESULT_HPP_012705GER

 #define BOOST_TEST_PREDICATE_RESULT_HPP_012705GER

 // Boost.Test

 #include <boost/test/utils/class_properties.hpp>

 #include <boost/test/utils/wrap_stringstream.hpp>

 #include <boost/test/utils/basic_cstring/basic_cstring.hpp>

 // Boost

 #include <boost/shared_ptr.hpp>

 #include <boost/detail/workaround.hpp>

 // STL

 #include <cstddef>          // for std::size_t

 #include <boost/test/detail/suppress_warnings.hpp>

 //____________________________________________________________________________//

 namespace boost {

 namespace test_tools {

 // ************************************************************************** //

 // **************                predicate_result              ************** //

 // ************************************************************************** //

 class BOOST_TEST_DECL predicate_result {

     typedef unit_test::const_string      const_string;

 public:

     // Constructor

     predicate_result( bool pv_ ) 

     : p_predicate_value( pv_ )

     {}

     template<typename BoolConvertable>

     predicate_result( BoolConvertable const& pv_ ) : p_predicate_value( !!pv_ ) {}

     bool                operator!() const           { return !p_predicate_value; }

     void                operator=( bool pv_ )       { p_predicate_value.value = pv_; }

     // Public properties

     BOOST_READONLY_PROPERTY( bool, (predicate_result) ) p_predicate_value;

     // Access methods

     bool                has_empty_message() const   { return !m_message; }

     wrap_stringstream&  message()

     {

         if( !m_message )

             m_message.reset( new wrap_stringstream );

         return *m_message;

     }

     const_string        message() const                   { return !m_message ? const_string() : const_string( m_message->str() ); }

 private:

     // Data members

     shared_ptr<wrap_stringstream> m_message;

 };

 } // namespace test_tools

 } // namespace boost

 //____________________________________________________________________________//

 #include <boost/test/detail/enable_warnings.hpp>

 // ***************************************************************************

 //  Revision History :

 //

 //  $Log: predicate_result.hpp,v $

 //  Revision 1.7  2005/12/14 05:16:49  rogeeff

 //  dll support introduced

 //

 //  Revision 1.6  2005/03/23 21:02:17  rogeeff

 //  Sunpro CC 5.3 fixes

 //

 //  Revision 1.5  2005/02/20 08:27:06  rogeeff

 //  This a major update for Boost.Test framework. See release docs for complete list of fixes/updates

 //

 //  Revision 1.4  2005/02/03 20:39:12  rogeeff

 //  m_message zero init for sunpro

 //

 //  Revision 1.3  2005/02/01 06:40:06  rogeeff

 //  copyright update

 //  old log entries removed

 //  minor stilistic changes

 //  depricated tools removed

 //

 //  Revision 1.2  2005/01/31 20:07:19  rogeeff

 //  Sunpro CC 5.3 workarounds

 //

 //  Revision 1.1  2005/01/30 03:24:51  rogeeff

 //  extended_predicate_result renamed ot predicate_result and moved into separate file

 //

 // ***************************************************************************

 #endif // BOOST_TEST_PREDICATE_RESULT_HPP_012705GER