[re 64-bit Tcl]
> The caveat here is that no one single Tcl_Obj can exceed 4 GB
> as it still uses "int" instead of "size_t" in places.
> However, the overall process can now exceed 4 GB -- yay!

Just to correct, the Tcl_Obj probably can't exceed 2GB in size
since (for silly historical reasons) the length member of the
Tcl_Obj struct is of type 'int' (not even unsigned).  This
can't change until Tcl9 or you will break binary compatability
with existing extensions.  In any case, for most people it is
the ability to use more than 4GB of mem, not all in one Tcl_Obj,
that is important.  If you really need the single-obj blob, you
can create your own Tcl_Obj type which uses the internalRep
structure to contain ... whatever you want.

Jeff


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