Re: [Haskell-cafe] Test.QuickCheck: generate

On 08/10/09 04:57, David Menendez wrote:

On Wed, Oct 7, 2009 at 8:29 PM, Michael Mossey wrote:

...

In Test.QuickCheck, the type of 'generate' is

generate :: Int -> StdGen -> Gen a -> a

I can't find docs that explain what the Int does. Some docs are here:

Judging by the source code, the integer is the upper bound for the size parameter. If you are generating a list, for example, it gives the maximum size of the list Thats right. Its the "size" parameter, and what it does depends on the instance of Arbitrary. Arbitrary numbers will be within +/- size. Arbitrary lists will be of maximum length size. On the other hand arbitrary booleans will just be True or False.