Liberalising IncoherentInstances

Joachim Breitner mail at
Mon Jul 29 23:46:30 CEST 2013


Am Montag, den 29.07.2013, 16:19 +0100 schrieb John Lato:
> +1 to the original proposal and Edward's suggestion of emitting a
> warning.  I've occasionally wanted this behavior from
> IncoherentInstances as well.

+1 for the proposal, -1 for the warning: It is a feature, not a bug, at
least there where I need it (newtype casting), and then having warnings
would be confusing.


Joachim “nomeata” Breitner
  mail at joachim-breitner.de
  Jabber: nomeata at  • GPG-Key: 0x4743206C
  Debian Developer: nomeata at
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