ceph/src/boost/libs/test/include/boost/test/tools/assertion_result.hpp

   1 //  (C) Copyright Gennadiy Rozental 2001.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7 //
   8 /// @file
   9 /// Enhanced result for test predicate that include message explaining failure
  10 // ***************************************************************************
  11
  12 #ifndef BOOST_TEST_PREDICATE_RESULT_HPP_012705GER
  13 #define BOOST_TEST_PREDICATE_RESULT_HPP_012705GER
  14
  15 // Boost.Test
  16 #include <boost/test/utils/class_properties.hpp>
  17 #include <boost/test/utils/wrap_stringstream.hpp>
  18 #include <boost/test/utils/basic_cstring/basic_cstring.hpp>
  19
  20 // Boost
  21 #include <boost/shared_ptr.hpp>
  22 #include <boost/detail/workaround.hpp>
  23
  24 // STL
  25 #include <cstddef>          // for std::size_t
  26
  27 #include <boost/test/detail/suppress_warnings.hpp>
  28
  29 //____________________________________________________________________________//
  30
  31 namespace boost {
  32 namespace test_tools {
  33
  34 // ************************************************************************** //
  35 // **************                assertion_result              ************** //
  36 // ************************************************************************** //
  37
  38 //!@brief Type used for storing the result of an assertion.
  39 class BOOST_TEST_DECL assertion_result {
  40
  41     //!@internal
  42     typedef unit_test::const_string      const_string;
  43
  44     //!@internal
  45     struct dummy { void nonnull() {} };
  46
  47     //!@internal
  48     typedef void (dummy::*safe_bool)();
  49
  50 public:
  51     // Constructor
  52     assertion_result( bool pv_ )
  53     : p_predicate_value( pv_ )
  54     {}
  55
  56     template<typename BoolConvertable>
  57     assertion_result( BoolConvertable const& pv_ ) : p_predicate_value( !!pv_ ) {}
  58
  59     // Access methods
  60     bool                operator!() const           { return !p_predicate_value; }
  61     void                operator=( bool pv_ )       { p_predicate_value.value = pv_; }
  62     operator            safe_bool() const           { return !!p_predicate_value ? &dummy::nonnull : 0; }
  63
  64     // Public properties
  65     BOOST_READONLY_PROPERTY( bool, (assertion_result) ) p_predicate_value;
  66
  67     // Access methods
  68     bool                has_empty_message() const   { return !m_message; }
  69     wrap_stringstream&  message()
  70     {
  71         if( !m_message )
  72             m_message.reset( new wrap_stringstream );
  73
  74         return *m_message;
  75     }
  76     const_string        message() const                   { return !m_message ? const_string() : const_string( m_message->str() ); }
  77
  78 private:
  79     // Data members
  80     shared_ptr<wrap_stringstream> m_message;
  81 };
  82
  83 typedef assertion_result predicate_result;
  84
  85 } // namespace test_tools
  86 } // namespace boost
  87
  88 #include <boost/test/detail/enable_warnings.hpp>
  89
  90 #endif // BOOST_TEST_PREDICATE_RESULT_HPP_012705GER