[Haskell-cafe] ANNOUNCE: error-message

Henning Thielemann lemming at henning-thielemann.de
Fri Dec 4 10:55:31 EST 2009

Gregory Crosswhite schrieb:
> If there is one thing that we really don't have enough of in Haskell, it is *ways to handle errors*!  Thus, I am pleased to announce the release of the "error-message" package to help in filling this, erm, gap.
> This philosophy behind this package is that it is often better to find out all of the errors that have occured in a computation and report them simultaneously, rather than aborting as soon as the first error is encountered.  Towards this end, this package supplies a type of /combinable error messages/ (ErrorMessage in the Data.ErrorMessage module) so that all of the errors from subcomputations can be gathered and presented together.

I would call such non-serious errors 'warnings'. Warnings can be
collected using Writer monad.

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