Dear all, For a long time I have been missing this utility in my own work, and in boost related stuff too. I think there are a number of libraries in boost that can benefit from this utility. Libs like boost.format can be quite a bit more effective. So can logging libraries. etc. Basically boost::auto_buffer<T,N> is a C++ version of variable lenght array (from C99). It's based on Matthew Wilson's stlsoft::auto_buffer, which can be found described in his book "Imperfect C++". I have changed a few things though: // - no swap() and resize() provided // - works with allocators from Boost.Interprocess // - do not store T[N] on the stack, as this is bad when the // type has a non-trivial default constructor. // - handless non-pod types in an exception-safe manner // - has a fixed capacity, but a non-fixed size // - provides a non-growing (thus inlineable) push_back() Comments are most welcome. best regards -Thorsten