Hi, I asked about the missing less-than equivalent to the is_equal and is_iequal predicates in the boost string_algo library some time ago. I was told that they are subject to enter the boost library soon (it's actually not much more than a copy'n'paste job from is_equal). But now since 1.33 is live and it's still not in the library, I thought I'd ask again. I have already written is_iless, if that is of any help: struct is_iless { is_iless(const std::locale& loc = std::locale()): loc_(loc) {} template<typename T1, typename T2> bool operator () (const T1& arg1, const T2& arg2) const { return std::toupper(arg1, loc_) < std::toupper(arg2 , loc_); } private: std::locale loc_; }; Any chance it will make it into the library with the next release? Best regards, Matthias