#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 -------------------------------------+------------------------------------- Comment (by hvr): Replying to [comment:22 RyanGlScott]:
Bear in mind that it's already possible for literals to crash at runtime: {{{ λ> -1 :: Natural *** Exception: arithmetic underflow }}}
Somewhat related, #10930 wants GHC to at least emit a compiler warning in that case -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10365#comment:23 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler