#10778: GHC doesn't infer all constrains -------------------------------------+------------------------------------- Reporter: danilo2 | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by danilo2): No, But there are the GADTs constraints: {{{ IndexOf a cont ~ idx, ElementByIdx idx cont ~ a, Measurable cont }}} So {{{idx}}} is always result of {{{IndexOf a cont}}}. Is this information not enough for Haskell? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10778#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler