#11451: Inconsistent warnings for unused binders in type and instance declarations -------------------------------------+------------------------------------- Reporter: simonpj | Owner: Type: bug | Status: patch Priority: normal | Milestone: 8.0.1 Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1825 Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): Simon, I believe we will have precisely what you described with Phab:D1825. `-Wname-shadowing` controls unused `forall`-ed type variables, and `Wtype-variables` controls unused type patterns separately. You can enable different combinations of them to achieve A, B, and C. The only remaining question is if we want a single flag that implies C (my previous name suggestion was `-pedantic`). This would be pretty easy to implement if we wanted it, since it would just enable a superset of the flags implied by `-Wall`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11451#comment:28 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler