Re: [Haskell-cafe] Installing and running QuickCheck
Hi Daniel, Yes, importing Data.Char worked, but revealed other problems. Now I get the following. ERROR C:\Program Files\Hugs98\libraries\QuickCheck.hs:161 - Undefined variable fromInt Monad This, however, I have seen before, and it has to do with different versions of Prelude, where fromInt was removed and fromInteger put in. From hugs-bugs, we find that we need to just change fromInt to fromInteger on the appropriate line. http://www.haskell.org/pipermail/hugs-bugs/2005-January/001537.html So, starting with line 160 of QuickCheck.hs should read: instance Arbitrary Integer where arbitrary = sized $ \n - choose (-fromIntegral n,fromIntegral n) coarbitrary n = variant (fromInteger (if n = 0 then 2*n else 2*(-n) + 1)) And with these two changes, QuickCheck compiles. Now I have to see how it works. Thanks, Adam Quoting Daniel Fischer [EMAIL PROTECTED]: Hm, no instance Arbitrary Char is provided in the QuickCheck modules that came with my hugs or ghc. Probably the author just forgot to import Data.Char. Try inserting that in QuickCheck.hs. Hope that works, Daniel This message was sent using IMP, the Internet Messaging Program. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Installing and running QuickCheck
Hm, no instance Arbitrary Char is provided in the QuickCheck modules that came with my hugs or ghc. Probably the author just forgot to import Data.Char. Try inserting that in QuickCheck.hs. Hope that works, Daniel Am Samstag, 9. April 2005 21:10 schrieb Adam Wyner: Hi, I'd like to use QuickCheck for testing Haskell programs. I'm using Hugs in Windows. I'm a newbie to Haskell. Just running QuickCheck.hs itself, which comes with the Hugs98 libraries, I get an error message and the Monad command line, which indicates that quickcheck didn't load. ERROR C:\Program Files\Hugs98/libraries\QuickCheck.hs:147 - Undefined variable chr Monad Here is the line in QuickCheck.hs which leads to the error. instance Arbitrary Char where arbitrary = choose (32,255) = \n - return (chr n) coarbitrary n = variant (ord n) This code is from the website: http://www.cs.chalmers.se/~rjmh/QuickCheck/QuickCheck.hs I tested it with the following module, as per the instructions in on QuickCheck's manual page: module TestQuickCheck where import QuickCheck prop_RevRev xs = reverse (reverse xs) == xs where types = xs::[Int] Loading just this, I get the same error: Prelude :l TestQuickCheck ERROR C:\Program Files\Hugs98/libraries\QuickCheck.hs:147 - Undefined variable chr Monad I know others report using QuickCheck, so this problem must have been resolved. Also, I guess the quickcheck script is for Linux alone? Any scripts for Hugs in Windows? Cheers, Adam ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Installing and running QuickCheck
Hi, I'd like to use QuickCheck for testing Haskell programs. I'm using Hugs in Windows. I'm a newbie to Haskell. Just running QuickCheck.hs itself, which comes with the Hugs98 libraries, I get an error message and the Monad command line, which indicates that quickcheck didn't load. ERROR C:\Program Files\Hugs98/libraries\QuickCheck.hs:147 - Undefined variable chr Monad Here is the line in QuickCheck.hs which leads to the error. instance Arbitrary Char where arbitrary = choose (32,255) = \n - return (chr n) coarbitrary n = variant (ord n) This code is from the website: http://www.cs.chalmers.se/~rjmh/QuickCheck/QuickCheck.hs I tested it with the following module, as per the instructions in on QuickCheck's manual page: module TestQuickCheck where import QuickCheck prop_RevRev xs = reverse (reverse xs) == xs where types = xs::[Int] Loading just this, I get the same error: Prelude :l TestQuickCheck ERROR C:\Program Files\Hugs98/libraries\QuickCheck.hs:147 - Undefined variable chr Monad I know others report using QuickCheck, so this problem must have been resolved. Also, I guess the quickcheck script is for Linux alone? Any scripts for Hugs in Windows? Cheers, Adam begin:vcard fn:Adam Zachary Wyner n:Wyner;Adam Zachary org:King's College London;Department of Computer Science adr:;;26-29 Drury Lane;London;;WC2B 5RL;United Kingdom email;internet:[EMAIL PROTECTED] tel;work:+44-207-848-2476 tel;fax:+44-207-848-2851 tel;cell:+44-079-8482-3438 url:http://www.dcs.kcl.ac.uk/pg/wyner version:2.1 end:vcard ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
