Hello All, Following this discussion: [regex] How robust are the <boost/regex/pending/unicode_iterator.hpp> adapters? http://thread.gmane.org/gmane.comp.lib.boost.devel/221643 Boost.Locale will ship **header-only** utf_to_utf conversion functions and provide operations that would allow implementing iteration over UTF-XX sequences. This was one of the review requests and it will be integrated in few days into trunk. Functions: namespace boost { namespace locale { namespace conv { template<typename CharOut,typename CharIn> std::basic_string<CharOut> conv::utf_to_utf(CharIn const *begin,CharIn const *end,method_type how=skip); template<typename CharOut,typename CharIn> std::basic_string<CharOut> conv::utf_to_utf(CharIn const *str,method_type how=skip); template<typename CharOut,typename CharIn> std::basic_string<CharOut> conv::utf_to_utf(std::basic_string<CharIn> const &str,method_type how=skip); }}} // boost::locale::conv Also it would provide basic utf encoding/decoding operations that would allow to create iterators over generic streams namespace boost { namespace locale { namespace utf { typedef uint32_t code_point; static const code_point illegal = ... ; static const code_point incomplete = ... ; // Get one code point from UTF stream template<typename InputIterator> code_point decode(InputIterator &p,InputIterator e); // Write one code point to UTF stream template<typename OutputIterator> Iterator encode(code_point u,OutputIterator e); // Get size of code point in basic unit template<typename CharType> int units_in_code_point(code_point u); }}} // boost::locale::utf It should be ready very soon... Artyom Beilis -------------- CppCMS - C++ Web Framework: http://cppcms.sf.net/ CppDB - C++ SQL Connectivity: http://cppcms.sf.net/sql/cppdb/