[Haskell-cafe] Not working examples in GHC API documentation

[John Blackbox]

Great, but how can we learn the API, when examples are not working? -.-


2013/7/18 Johan Tibell <johan.tibell at gmail.com>

> I filed a bug a while back:
>
>     http://ghc.haskell.org/trac/ghc/ticket/7752
>
> Someone that understands the API needs to fix the doc. :)
>
> On Thu, Jul 18, 2013 at 7:58 PM, John Blackbox
> <blackbox.dev.ml at gmail.com> wrote:
> > Hi!
> > Please take a look here:
> http://www.haskell.org/haskellwiki/GHC/As_a_library
> > The examples are not working. Even the simpelst one:
> >
> > import GHC
> >
> > import GHC.Paths ( libdir )
> >
> > import DynFlags ( defaultLogAction )
> >
> >
> >
> > main =
> >
> >     defaultErrorHandler defaultLogAction $ do
> >
> >       runGhc (Just libdir) $ do
> >
> >         dflags <- getSessionDynFlags
> >
> >         setSessionDynFlags dflags
> >
> >         target <- guessTarget "test_main.hs" Nothing
> >
> >         setTargets [target]
> >
> >         load LoadAllTargets
> >
> >
> >
> > throws:
> >
> >
> > $> ghc -package ghc Main.hs
> >
> > [1 of 1] Compiling Main             ( Main.hs, Main.o )
> >
> > Main.hs:6:25:
> >
> >     Couldn't match type `DynFlags' with `[Char]'
> >
> >     Expected type: DynFlags.FatalMessager
> >
> >       Actual type: DynFlags.LogAction
> >
> >     In the first argument of `defaultErrorHandler', namely
> >
> >       `defaultLogAction'
> >
> >     In the expression: defaultErrorHandler defaultLogAction
> >
> >     In the expression:
> >
> >       defaultErrorHandler defaultLogAction
> >
> >       $ do { runGhc (Just libdir)
> >
> >              $ do { dflags <- getSessionDynFlags;
> >
> >                     setSessionDynFlags dflags;
> >
> >                     .... } }
> >
> > Main.hs:7:7:
> >
> >     Couldn't match expected type `DynFlags.FlushOut'
> >
> >                 with actual type `IO SuccessFlag'
> >
> >     In a stmt of a 'do' block:
> >
> >       runGhc (Just libdir)
> >
> >       $ do { dflags <- getSessionDynFlags;
> >
> >              setSessionDynFlags dflags;
> >
> >              target <- guessTarget "test_main.hs" Nothing;
> >
> >              setTargets [target];
> >
> >              .... }
> >
> >     In the second argument of `($)', namely
> >
> >       `do { runGhc (Just libdir)
> >
> >             $ do { dflags <- getSessionDynFlags;
> >
> >                    setSessionDynFlags dflags;
> >
> >                    .... } }'
> >
> >     In the expression:
> >
> >       defaultErrorHandler defaultLogAction
> >
> >       $ do { runGhc (Just libdir)
> >
> >              $ do { dflags <- getSessionDynFlags;
> >
> >                     setSessionDynFlags dflags;
> >
> >                     .... } }
> >
> >
> >
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> > http://www.haskell.org/mailman/listinfo/haskell-cafe
> >
>
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