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

Great, but how can we learn the API, when examples are not working? -.- 2013/7/18 Johan Tibell

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 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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