[Haskell-cafe] Ensuring all values of an ADT are explicitly handled OR finding all occurrences of type X in my app

Erik de Castro Lopo mle+hs at mega-nerd.com
Tue Jan 31 07:34:04 UTC 2017

Branimir Maksimovic wrote:

> Actually in team, one who writes `_` match, is very useful as that 
> prevents breaking code when adding new value...

I write Haskell code in a team of 15 engineers and wild card pattern
matches are considered a bad idea exactly *because* we want compiler
errors when a sum type is extended with a new constructor.

Erik de Castro Lopo

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