#14824: automatically select instance -------------------------------------+------------------------------------- Reporter: zaoqi | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by zaoqi: Old description:
There is {{{#!hs class C a b where m :: [a] -> b instance C x0 x0 instance C x1 x2 instance C x0 x3 }}} x0 x1 x2 x3 is Types. FunctionalDependencies can't work.
New description: There is {{{#!hs class C a b where m :: [a] -> b instance C x0 x0 instance C x1 x2 instance C x0 x3 }}} x0 x1 x2 x3 are Types. FunctionalDependencies can't work. -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14824#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler