I don't know anything about the GNU APL implementation, but I can tell you that the definition of tolerant-floor changed between standard APL (ISO 8485) and Extended APL (ISO 13751). In ISO 8485 the tolerance is relative, so both your examples should definitely return 5. In Extended APL the tolerance is absolute, so both your examples are right on the cusp of whether they should return 5 or the next integer up/down.
Jay. On 12 August 2015 at 03:25, Mike Duvos <m...@wolf359.net> wrote: > > ⌊5-⎕CT > 4 > > ⌈5+⎕CT > 6 > > > Unless something has drastically changed since I last read the APL spec, > both of these should return 5. > >
