Thanks, that handy and works for my test.
 
Any idea why the implication does not ??? 
 
 
On Tue, Nov 13, 2012, at 09:59 PM, Ozgur Akgun wrote:
hi,
 
On 13 November 2012 21:52, <graham@fatlazycat.com> wrote:
prop_something x y = .......do blah with positive integers
  ==> x > 0 && y > 0
 
quickcheck provides a few nice new types for such cases. try:
 
prop_something (Positive x) (Positive y) = ...
 
this way qc only generates positive numbers, instead of generating and discarding some.
 
hth,
 
--
Ozgur Akgun