WARNING pragmas in `Prelude.undefined` and `Prelude.error`

Tony Morris tonymorris at gmail.com
Tue Jan 14 02:58:57 UTC 2020

To add, I know quite a few developers who, during development, use
undefined in place of an "I don't know yet" to get the program
compiling, then perhaps might add an underscore _undefined to determine
the type.

Using undefined is perhaps less preferable to using :reload! but it's
quite a bit to type and :r! doesn't work.

On 22/12/19 10:26 pm, Francesco Ariis wrote:
> On Sun, Dec 22, 2019 at 01:44:58PM +0200, Vilem Liepelt wrote:
>> Has there been any discussion about adding WARNING pragmas to `Prelude.undefined` and `Prelude.error`, as done in some custom preludes?
>> I suppose this hasn't been done yet to avoid breaking existing code which makes "legitimate" use of those helpers?
> `undefined` is useful when you want to check types in, e.g. ghcid, without
> writing a function in full.
> With -Wall on, that Warning could become annoying fast.
> _______________________________________________
> Libraries mailing list
> Libraries at haskell.org
> http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: OpenPGP digital signature
URL: <http://mail.haskell.org/pipermail/libraries/attachments/20200114/661f9b9f/attachment.sig>

More information about the Libraries mailing list