On Fri, Nov 09, 2001 at 09:14:10AM -0800, Larry Wall wrote: > NaN is merely the floating-point representation of undef when your > variable is stored in a bare num. And if you declare a variable as > int, there may well be no representation for undef at all! Similarly, > it may be impossible to taint an int or a num, unless we can figure > out a way to stuff such information into 0 bits. But I'd like an > array of int or num to be compact.
Probably this is rather late, and possibly this is an internals issue, but isn't squeezing it in 0 bits as simple as having a parallel bit array for storing the taint bit for each array of int or array of num? (when tainting is enabled) Nicholas Clark -- ETAXMANUNHAPPY http://www.ccl4.org/~nick/CV.html
