[GHC] #7816: "main function" is not a function

6 Apr 2013

      #7816: "main function" is not a function
----------------------------------------------+-----------------------------
Reporter:  monoidal                           |          Owner:                  
    Type:  bug                                |         Status:  new             
Priority:  normal                             |      Component:  Compiler        
 Version:  7.6.2                              |       Keywords:                  
      Os:  Unknown/Multiple                   |   Architecture:  Unknown/Multiple
 Failure:  Incorrect warning at compile-time  |      Blockedby:                  
Blocking:                                     |        Related:                  
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 A module without main gives an error:

 {{{
 A.hs:1:1: The function ‛main’ is not defined in module ‛Main’
 }}}

 However, main in Haskell is not a function. This is often a cause of
 misunderstandings, for example see
 [http://ircbrowse.net/browse/haskell?q=main+not+function IRC discussions]
 or [http://conal.net/blog/posts/everything-is-a-function-in-haskell Conal
 Elliott's "Everything is a function in Haskell"]. I suggest changing this
 to:

 {{{
 A.hs:1.1: The IO action ‛main’ is not defined in module ‛Main’
 }}}

-- 
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7816
GHC http://www.haskell.org/ghc/
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