Sean Farrow wrote:

I'm using boost.array in a call (waitForMultipleObjects) to be specific. I am passing the c_array() (i.e void const *) if I do this do I need to use 0 or can I still use 1-based indices for my switch statement.Any help appreciated.

Please note that the current version of boost::array::c_array() is somewhat questionable. It does not return a reference to the internal C-style array, as one might expect. Herve Martin submitted a ticket on this issue: Ticket #2857, "change return type of the c_array() member function", https://svn.boost.org/trac/boost/ticket/2857 The Standard C++ Library Working Group (LWG) considers adding a similar function to std::array: LWG issue 930, "Access to std::array data as built-in array type" www.open-std.org/JTC1/SC22/WG21/docs/lwg-active.html#930 Anyway, in your case, you might consider using boost::array::data() instead. But whatever you do, array indices always start at zero, in C++. Does that answer your question? Kind regards, Niels -- Niels Dekker http://www.xs4all.nl/~nd/dekkerware Scientific programmer at LKEB, Leiden University Medical Center