Hi,
Nowadays I am using Hugs 98 interpreter (2001 version) to finish my final
work to get my Computer Master Degree at Instituto Tecnológico de Costa Rica.
Next, I have transcribed part of the code from Hugs's Help in Multiple
Parameter Classes and Dependencies Section
---
module KK where
class E a b | a -> b, b -> a where
go :: a -> b -- line 5, personal addition
back :: b -> Maybe a -- personal addition
---
With the previous declaration Hugs gives me the following message:
ERROR KK.hs:5 - Haskell 98 does not support dependent parameters.
And I tried too:
---
module KK where
class C a b where -- line 3
ok :: a -> b
ko :: b -> Maybe a
---
and Hugs gives me the message:
ERROR KK.hs:3 - Haskell 98 does not support multiple parameter
classes
Comment:
Hugs 98 User Manual of September 1999, says that the facility of Multiple
parameter type classes already is available in Hugs 98.
Then, how can I use this?
I installed the following files again again (from Web site)
* Win32.zip
* Win32exes.zip
* Hugs98-Feb2001.zip -- Hugs for Windows 32
* Hugs.hlp
Thank you for paying attention to this,
Javier.
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Po.Box TELEFONOS
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Javier Torres Salgado Panama: (507)770-5042
Estafeta Universitaria Costa Rica: (506)551-4336*
Universidad Autonoma de Chiriqui (506)551-6503
Chiriqui, Panama
(COSTA RICA) E-MAIL
Javier Torres Salgado
Apdo 13307050 [EMAIL PROTECTED]
Cartago, Costa Rica [EMAIL PROTECTED]
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