#10365: Implement Semigroup as a superclass of Monoid Proposal (Phase 1) -------------------------------------+------------------------------------- Reporter: gidyn | Owner: quchen Type: feature request | Status: patch Priority: high | Milestone: 8.0.1 Component: libraries/base | Version: 7.10.1 Resolution: | Keywords: report-impact Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1284 Wiki Page: | -------------------------------------+------------------------------------- Comment (by rwbarton): You can rename the method of `Semigroup` with type `a -> [a] -> a` and move `sconcat` to a top-level definition in `Data.List.NonEmpty`, and that should hardly break anyone compared to the rather substantial `Semigroup => Monoid` superclass addition that is the main part of this proposal. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10365#comment:39 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler