Paul Johnson <paul@pjcj.net> writes: >On Fri, Nov 02, 2001 at 02:44:20PM -0500, Michael G Schwern wrote: > >> They're just two levels of deletion which we find handy. It allows >> one to cram FOUR meanings into an individual hash value: >> >> 1) There is a true value here >> 2) There is a false value here >> 3) There is an undefined value here >> 4) There is no value here > >Why stop at four? VHDL has a nine valued logic type. How are we going >to properly describe hardware without it? Coincidentally ;-) The class(es) I have that would be ideally suited to the non-deletable form of restricted hashes are part of my hardware describing package. -- Nick Ing-Simmons http://www.ni-s.u-net.com/Thread Previous | Thread Next