[[[ Reposting as the first message didn't get through ]]] Paul A Bristow wrote:

A further detail that might cause trouble for older compilers that I have confirmed with John Maddock.

BOOST_STATIC_ASSERT doesn't work for all and needs to be a BOOST_ASSERT instead thus:

#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS BOOST_STATIC_ASSERT(::std::numeric_limits<T>::is_specialized); #else BOOST_ASSERT(::std::numeric_limits<T>::is_specialized); #endif

I just realised that I use BOOST_STATIC_ASSERT in lexical_cast optimization patch (http://tinyurl.com/qu388): BOOST_STATIC_ASSERT(std::numeric_limits<T>::digits10 < CHAR_MAX); This check is applied only to integral types. I thought I could replace std::numeric_limits<T> with boost::integer_traits<T> but I don't see any use of BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS in integer_traits.hpp. -- Alexander Nasonov http://nasonov.blogspot.com http://alnsn.livejournal.com