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  • #16155

Closed
Open
Opened Jan 09, 2019 by Zemyla@trac-Zemyla

Pattern Synonym for Ratio

Data.Ratio should export a simple pattern synonym that can be used by Safe code.

infixl 7 :%:

pattern n :%: d <- n :% d where
  n :%: d = n % d

It'd be much simpler to use than numerator and denominator, and pattern matching on it would turn into a regular pattern match, hopefully for free.

Trac metadata
Trac field Value
Version 8.6.3
Type FeatureRequest
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Core Libraries
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Reference: ghc/ghc#16155