Addition to boost config

From: jbandela_at_[hidden]
Date: 2001-12-03 00:09:02

In making a recent change to tokenizer, I ended up needing the 
category of the iterator. It proved to be a real pain, because 
1) iterator_traits only works nice on compilers with partial template 
specialization
2) Every library defines (it seems) a different function to get the 
iterator category.

It seems it would be useful to have a BOOST_ITERATOR_CATEGORY in 
config.hpp

Here is a version called BOOST_DETAIL_ITERATOR_CATEGORY that I made 
using the iterator_category functions in 
\boost\libs\regex\test\regress\regress.h as a guide

Let me know what you think

Regards,

John R. Bandela

#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION // No partial 
specialization
#ifdef __SGI_STL_PORT // STLPort
        #if __SGI_STL_PORT <= 0x400
#define BOOST_DETAIL_ITERATOR_CATEGORY(iter,tp) 
std::__ITERATOR_CATEGORY(iter) 
        #else
#define BOOST_DETAIL_ITERATOR_CATEGORY(iter,tp) 
std::_STLP_ITERATOR_CATEGORY(iter,tp) 
        #endif
#elif BOOST_RWSTD_VER
  #define BOOST_DETAIL_ITERATOR_CATEGORY(iter,tp) 
std::__iterator_category(iter) 
#elif defined(__STL_CONFIG_H)
  #define BOOST_DETAIL_ITERATOR_CATEGORY(iter,tp) 
std::iterator_category(iter) 
#elif (defined(BOOST_MSVC) || defined(__ICL)) && (defined(_YVALS) || 
defined(_CPPLIB_VER))
  #define BOOST_DETAIL_ITERATOR_CATEGORY(iter,tp) std::_Iter_cat
(iter) 
#else

 #define BOOST_DETAIL_ITERATOR_CATEGORY(iter,tp) \
  std::iterator_traits<tp>::iterator_category()
#endif 
#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
 #define BOOST_DETAIL_ITERATOR_CATEGORY(iter,tp) \
  std::iterator_traits<tp>::iterator_category()
#endif