The updated version of string_algo (using boost.range library) no longer works with VC70. trim_copy_if(std::string(" abc "), is_any_of(" ")); generates the following error: boost\range\detail\begin.hpp(114) : error C2027: use of undefined type 'boost::range_detail::range_begin<T>' with [ T=boost::range_detail::range<const char [2]>::type ] boost\algorithm\string\detail\classification.hpp(68) : see reference to function template instantiation 'boost::range_result_iterator<C>::type boost::begin(C (&))' being compiled with [ C=const char [2] ] boost\algorithm\string\classification.hpp(203) : see reference to function template instantiation 'boost::algorithm::detail::is_any_ofF<CharT>::is_any_ofF (SeqT (&))' being compiled with [ CharT=boost::range_value<C>::type, SeqT=const char [2] ]