Re: [Haskell-cafe] pattern match failure as control structure

Excerpts from Dan Mead's message of Tue Nov 10 20:23:26 +0100 2009:

i think that may be too in depth.

all i'm trying to do is catch a regular pattern match exception

On Tue, Nov 10, 2009 at 5:50 AM, Roel van Dijk wrote:

...

Have a look at this recently uploaded package:

http://hackage.haskell.org/package/first-class-patterns

Examine the "tryMatch" function in particular.

You can do this with Control.Exception.evaluate [1]. However while it looks like what you want I recommend you to not use it too often, catching "error" calls is not the best way of using Haskell. However if this is for debugging purpose or setting up a global exception catcher for a final product then this is fine. [1]: http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Exception... -- Nicolas Pouillard http://nicolaspouillard.fr