26 Feb
2002
26 Feb
'02
9:41 p.m.
On Tuesday, February 26, 2002, 15:36:18 EST, David Feuer wrote:
[...] Question: Is there any standard way in Haskell of determining the maximal and minimal Int values?
There is one. Use maxBound :: Int and minBound :: Int.
[...]
By the way, the report says: "Class Enum defines operations on sequentially ordered types." I think the "sequentially" means that multiple applications of succ to a value shall not result in the same value. That's why I think that succ (maxBound :: Int) should be an error and not minBound :: Int. Because i + 1 should be equal to succ i for every Int value i, (maxBound :: Int) + 1 should also be an error and so should every arithmetic operation that overflows or underflows. Wolfgang