[Haskell-cafe] Ensuring all values of an ADT are explicitly handled OR finding all occurrences of type X in my app
b at chreekat.net
Tue Jan 31 05:25:30 UTC 2017
On Jan 30, 2017 21:00, "Saurabh Nanda" <saurabhnanda at gmail.com> wrote:
I would want the compiler (or linter) to help me here. Think if a
mid-to-large team where everyone may not know (or remember) what the
current best practices are.
I believe you are asking, "Is there an option to emit warnings when the
underscore pattern is used?"
I further believe the answer to that question is no.
I can appreciate your use case, however.
On 31 Jan 2017 9:51 am, "Michael Orlitzky" <michael at orlitzky.com> wrote:
> On 01/30/2017 09:47 PM, Saurabh Nanda wrote:
> > Hi,
> > If I have the following ADT
> > data BookingState = Confirmed | Cancelled
> > which had a very high chance of being expanded in the future to have more
> > values. How do I ensure that every pattern match on BookingState matches
> > each value explicitly. Basically prevent the '_' matcher ?
> Don't write the "_" case? GHC will warn you about any pattern matches
> you've missed.
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