Re: [Haskell-cafe] Errors in non-monadic code

Except that people generally don't seem to agree what constitutes 'exceptional', even when disregarding the python world... On Aug 19, 2013 9:24 PM, "Brandon Allbery" wrote:

On Mon, Aug 19, 2013 at 2:59 PM, wrote:

...

I'd say that if you were in the context of the IO monad, maybe you'd prefer to use exceptions instead of 'Either' or 'Maybe'.

Even in IO, exceptions should be reserved for truly exceptional conditions (of the "program cannot safely continue" variety), not merely for error checking when this can be described as a normal flow of evaluation. Exceptions are not simply alternative flow of control, even in procedural languages; they are *disruptions* of flow of control.

-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net

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