PROPOSAL: Remove Control.OldException

Henning Thielemann lemming at
Mon Aug 3 14:25:19 EDT 2009

Iavor Diatchki schrieb:
> Hello,
> On Mon, Jul 20, 2009 at 10:11 PM, Duncan
> Coutts<duncan.coutts at> wrote:
>> On Mon, 2009-07-20 at 09:27 +0300, Iavor Diatchki wrote:
>>> Hello,
>>> Please do not remove OldException.
>>> -Iavor
>> Can you give any rationale? Are you trying to maintain compatibility
>> with base-3 by using CPP + OldException? Is that significantly easier
>> than using the extensible-exceptions package?
> 1. I would have to go and change all code that uses exceptions, again.
> 2. I am not sure how to write backwards compatible code.  CPP +
> OldException is not pretty but it works.
> 3. The extensible exception package is not Haskell 98 (it uses
> existentials), so it really would be nice if _it_ was placed in a
> separate package.


> On that topic, it would be great if we had a way to
> see what are all the extensions used by a program (including those
> used by dependent packages).


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