#12371: Error message, room for improvement -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Keywords: | Operating System: Unknown/Multiple TypeApplications | Architecture: | Type of failure: Incorrect Unknown/Multiple | warning at compile-time Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{ $ ghci -ignore-dot-ghci GHCi, version 8.0.1: http://www.haskell.org/ghc/ :? for help Prelude> :set -XPatternSynonyms Prelude> :set -XViewPatterns Prelude> pattern Foo a <- ((\uncons -> Just (a, as) -> a) -> a) <interactive>:3:20: error: Pattern syntax in expression context: \ uncons -> Just (a, as) -> a Did you mean to enable TypeApplications? }}} Let's: {{{ Prelude> :set -XTypeApplications Prelude> pattern Foo a <- ((\uncons -> Just (a, as) -> a) -> a) <interactive>:5:20: error: Pattern syntax in expression context: \ uncons -> Just (a, as) -> a Did you mean to enable TypeApplications? Prelude> }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12371 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler