-1 is often used to signify infinity, so the code using it would probably be a little clearer if it used that. However, since 0 isn't a logical value anyway, that's probably a good idea, though I haven't seen much bare type-converting in the Parrot source.
On 3/30/07, Nicholas Clark <[EMAIL PROTECTED]> wrote:
On Fri, Mar 30, 2007 at 10:25:59PM +0000, Alek Storm wrote: > How about like this: > > $P0 = getinterp > $P0["recursionlimit"] = 2000 > $P0["recursionlimit"] = -1 > > Where the last one signifies an infinite recursion limit (unsafe, but > it should still be available to HLL implementors). Is the value "recursionlimit" signed or unsigned? Using 0 to flag the infinite recursion limit might feel more natural. Using -1 to mean ~0 makes me edgy. In particular, because in C you can end up with integer size promotion meaning that -1 isn't -1. Or at least what you thought was -1 isn't -1 any more, because it was converted to unsigned, and then converted to a larger unsigned type, and so is now an unremarkable positive integer, rather than all bits set. Nicholas Clark
