#10708: Rejection of constant functions defined using conditional pattern matching -------------------------------------+------------------------------------- Reporter: HubertGaravel | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Resolution: invalid | Keywords: Operating System: Linux | Architecture: x86 Type of failure: GHC rejects | Test Case: valid program | Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by simonpj): well of course you ''can'' define `d3` like that. But the question posed by the ticket is: is it valid Haskell to write `d3` as in the description. Looking at the [https://www.haskell.org/onlinereport/haskell2010/haskellch4.html language spec] section 4.4.3, it seems that a 'funlhs' must have at least one argument. So this must be a 'pat' lhs, which can only have one set of guarded rhss. So yes, I think it's invalid. Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10708#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler