Exceptions with Hugs 98

[Alastair Reid]

juan albornoz <jalborno@escuelaing.edu.co> writes:
> Hello I need to catch some exceptions which I've "thrown" with the
> error function. I am using WinHugs 98. Can any one help me?

Something along the lines of:

  import qualified Exception as E

  foo = E.catch <mumble> (\e -> print e)

should do you.

See the papers on exception handling:

  http://www.reid-consulting-uk.ltd.uk/alastair/publications/except-pldi.ps.gz

and the documentation for the library 

  http://www.haskell.org/ghc/docs/latest/html/base/Control.Exception.html

(This is GHC documentation but the Hugs library is mostly compatible.
The main differences are in things not covered by the original paper -
see the (quite readable) source code for the Hugs version of Exception
for details.)

--
Alastair Reid                 alastair@reid-consulting-uk.ltd.uk  
Reid Consulting (UK) Limited  http://www.reid-consulting-uk.ltd.uk/alastair/