#12928: Too easy to trigger CUSK condition using TH -------------------------------------+------------------------------------- Reporter: int-index | Owner: Type: feature request | Status: new Priority: high | Milestone: Component: Compiler (Type | Version: 8.0.1 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by int-index): Replying to [comment:3 simonpj]:
We do! It's called a type signature.
It doesn't sound right. In a type signature, I can omit polymorphic kinds. In a CUSK, I cannot. The example in the ticket defines a method `fff` which has a type signature, but `a` is kind-polymorphic: {{{ class Cls a where fff :: Proxy a -> () }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12928#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler