[racket-dev] check-match?

rackunit has check-pred, of course.

Robby

On Mon, Nov 19, 2012 at 7:31 PM, Shriram Krishnamurthi <sk at cs.brown.edu> wrote:
> Predicates in general would be really awesome.  I think the testing
> infrastructure for Sperber's book (DMDA) has something like this.
>
> Making it lightweight is what matters most, whether through a new
> match form or a more general predicate form.
>
> Shriram
>
> On Mon, Nov 19, 2012 at 8:25 PM, David Van Horn <dvanhorn at ccs.neu.edu> wrote:
>> On 11/19/12 8:20 PM, Joe Gibbs Politz wrote:
>>>
>>>  > Yeah, that is very nice! (It should begin with "check" not "test"
>>> tho, right?)
>>>
>>> Indeed; Jonah was writing w.r.t plai, which uses test.  Should use
>>> check- in rackunit.
>>>
>>> I noticed that this also violates, from the rackunit docs:
>>>
>>> "Although checks are implemented as macros, which is necessary to grab
>>> source location, they are conceptually functions. This means, for
>>> instance, checks always evaluate their arguments."
>>>
>>> I suppose this should go in a separate section of "additional checks" or
>>> some such?
>>
>>
>> Maybe the right thing to do is make it lightweight to write predicates with
>> match so that you don't even need a separate testing form?
>>
>> Something like (? P) => (lambda (x) (match x [P true] [_ false]))
>>
>> David
>>
>>
>>
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