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include/boost/date_time/date_duration.hpp  view on Meta::CPAN

    bool is_negative() const
    {
        return days_ < 0;
    }
  private:
    duration_rep days_;
  };


  /*! Struct for instantiating date_duration with <b>NO</b> special values
   * functionality. Allows for transparent implementation of either
   * date_duration<long> or date_duration<int_adapter<long> > */
  struct duration_traits_long
  {
    typedef long int_type;
    typedef long impl_type;
    static int_type as_number(impl_type i) { return i; };
  };

  /*! Struct for instantiating date_duration <b>WITH</b> special values
   * functionality. Allows for transparent implementation of either
   * date_duration<long> or date_duration<int_adapter<long> > */
  struct duration_traits_adapted
  {
    typedef long int_type;
    typedef boost::date_time::int_adapter<long> impl_type;
    static int_type as_number(impl_type i) { return i.as_number(); };
  };
  

} } //namspace date_time

include/boost/format/detail/compat_workarounds.hpp  view on Meta::CPAN

//  and compiler-specific switches)

// Non-conformant Std-libs fail to supply conformant traits (std::char_traits,
//  std::allocator) and/or  the std::string doesnt support them.
// We don't want to have hundreds of #ifdef workarounds, so we define 
// replacement traits.
// But both char_traits and allocator traits are visible in the interface, 
// (inside the final string type),  thus we need to keep both 
// the replacement type (typedefed to 'compatible_type') for real use,
// and the original stdlib type (typedef to 'type_for_string') for interface
//  visibility. This is what Compat* classes do (as well as be transparent 
// when good allocator and char traits are present)

#ifndef BOOST_FORMAT_COMPAT_WORKAROUNDS_HPP
#define BOOST_FORMAT_COMPAT_WORKAROUNDS_HPP

namespace boost {
    namespace io {

        // gcc-2.95 char traits (non-conformantly named string_char_traits) 
        // lack several functions so we extend them in a replacement class.

include/boost/format/detail/compat_workarounds.hpp  view on Meta::CPAN

#endif



namespace boost {
    namespace io {

        // **** CompatTraits general definitions : ----------------------------
        template<class Tr>
        class CompatTraits
        {        // general case : be transparent
        public:
            typedef Tr  compatible_type;
        };

        // **** CompatAlloc general definitions : -----------------------------
        template<class Alloc>
        class CompatAlloc
        {        // general case : be transparent
        public:
            typedef Alloc  compatible_type;
        };

    } //N.S. io
} // N.S. boost
#endif // include guard

include/boost/format/detail/workarounds_gcc-2_95.hpp  view on Meta::CPAN

// ----------------------------------------------------------------------------

// There's a lot to do, the stdlib shipped with gcc prior to 3.x 
// was terribly non-conforming. 
// . defines macros switches
// . supplies template classes basic_foo<char,Tr> where gcc only supplies foo.
//  i.e :
//     -  basic_ios<char, Tr>        from ios
//     -  basic_ostream<char, Tr>    from ostream
//     -  basic_srteambuf<char, Tr>  from streambuf
// these can be used transparently. (it obviously does not work for wchar_t)
// . specialise CompatAlloc and CompatTraits to wrap gcc-2.95's 
//    string_char_traits and std::alloc 

#if  BOOST_WORKAROUND(__GNUC__, < 3) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
   // only for gcc-2.95's native stdlib

#ifndef BOOST_FORMAT_WORKAROUNDS_GCC295_H
#define BOOST_FORMAT_WORKAROUNDS_GCC295_H

// SGI STL doesnt have <ostream> and others, so we need iostream.

include/boost/serialization/is_abstract.hpp  view on Meta::CPAN

            typedef BOOST_DEDUCED_TYPENAME mpl::bool_<false> type;
            BOOST_STATIC_CONSTANT(bool, value = false); 
        #else
            typedef BOOST_DEDUCED_TYPENAME boost::is_abstract<T>::type type;
            BOOST_STATIC_CONSTANT(bool, value = type::value); 
        #endif
    };
} // namespace serialization
} // namespace boost

// define a macro to make explicit designation of this more transparent
#define BOOST_IS_ABSTRACT(T)                          \
namespace boost {                                     \
namespace serialization {                             \
template<>                                            \
struct is_abstract< T > {                             \
    typedef mpl::bool_<true> type;                    \
    BOOST_STATIC_CONSTANT(bool, value = true);        \
};                                                    \
}                                                     \
}                                                     \