#14800: -Wincomplete-uni-patterns should not warn about explicitly-marked irrefutable patterns -------------------------------------+------------------------------------- Reporter: EyalLotem | Owner: (none) Type: feature | Status: new request | Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- It is very useful to catch accidentally partial uni-pattern matches: Cons x = someVal However, we explicitly want an irrefutable pattern match: Vector2 0 y = Vector2 0 a `op` Vector2 0 b In this case, it would be really useful to opt out of the warning via: ~(Vector2 0 y) = ... The fact the match is partial is explicit and visible with the ~ syntax, so the warning shouldn't tell us about it. Right now this warning rules out this useful way of opting in to partiality. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14800 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler