casting in gdb

["Jacques Le Normand" <jacqueslen at sympatico dot ca>]

how do you get gdb to cast to size_t?
I realize that size_t is a typedef to unsigned long long or somesuch.
A little background:
when I'm debugging my vector<int> v, gdb won't let me type v[0], instead =
it says this: "One of the arguments you tried to pass to operator[] =
could not be converted to what the funtion wants."
I then looked up what operator[] took in the sgi docs and it said a =
size_t. Anyone have any ideas?
(I realize I can do p *(v._M_start+n) , but having a method for casting =
would help me later on)
--Jacques