text: //  (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: 1.6 $
  //
  //  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 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 1.6  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
  