#12556: `stimes` adds extra power to Semigroup -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: task | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by rwbarton): It doesn't seem like a problem to me if a particular `Semigroup`'s `stimes` is more defined than the default definition would be, as long as that extension is reasonable, i.e., a monoid homomorphism. Even allowing negative arguments would be reasonable if the `Semigroup` happens to be a group. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12556#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler