I'm dubious of the coercionRole refactor, as it undoes a refactoring I
#11735: Optimize coercionKind -------------------------------------+------------------------------------- Reporter: goldfire | Owner: (none) Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): put in a few years ago, for performance reasons. I looked at what code would be needed for `coercionRole` and its a remarkably short and simple function. Tobias, would to like to post the code? Richard, did you have a concrete reason for that refactoring? Or just a general worry? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11735#comment:16 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler