[Haskell-cafe] Best way to return Bool based on a successful pattern match?

[Nikita Karetnikov]

Looking at the instances defined for Bool and Either, I don't think
there's a higher level way of doing it.  But even if there's one, it'll
probably be more obscure than isLeft, which is in base since 4.7.0.0.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 818 bytes
Desc: not available
URL: <http://mail.haskell.org/pipermail/haskell-cafe/attachments/20150713/dcb8f065/attachment.sig>