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Today's Topics:
1. Re: Providing Haskell Libraries wrapped for other Languages
(鲍凯文)
----------------------------------------------------------------------
Message: 1
Date: Fri, 29 Nov 2019 07:11:55 -0800
From: 鲍凯文 <traqueofzi...@gmail.com>
To: beginners@haskell.org
Subject: Re: [Haskell-beginners] Providing Haskell Libraries wrapped
for other Languages
Message-ID:
<camjcg+e8zp1wrrpdcxm4urtfv21kw5_4n03nw9gettztgf2...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi,
Have you looked into Apache thrift (
https://thrift.apache.org
)? You’d provide interface definitions and the thrift compiler generates
client/server code from those. If the overhead of that is intolerable and
you really want to call functions “directly”, you could try exporting
haskell functions to c and then writing bindings to that for your language,
e.g. using the python c api or JNI. I’m just not sure how one’s supposed to
ensure initialization of the haskell runtime in any case.
Good luck
On Fri, Nov 29, 2019 at 5:00 AM <beginners-requ...@haskell.org> wrote:
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>
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> or, via email, send a message with subject or body 'help' to
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>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Beginners digest..."
>
>
> Today's Topics:
>
> 1. Providing Haskell Libraries wrapped for other Languages
> (Leonhard Applis)
> 2. Re: Providing Haskell Libraries wrapped for other Languages
> (Simon Jakobi)
> 3. strange error inside a case (PICCA Frederic-Emmanuel)
> 4. Re: strange error inside a case (Sylvain Henry)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 28 Nov 2019 14:15:27 +0000
> From: Leonhard Applis <leonhard.app...@protonmail.com>
> To: "beginners@haskell.org" <beginners@haskell.org>
> Subject: [Haskell-beginners] Providing Haskell Libraries wrapped for
> other Languages
> Message-ID:
>
> <GWMEmGPietL5BGMOXNm_vOI1zYWXem1x6GOctodu3ftdJVurBPz36E5Jjq_lzGz7XC4t1CNeY-XajQCrh0j4NKVFXBTTGG4pBmJL6bh4U4s=@
> protonmail.com>
>
> Content-Type: text/plain; charset="utf-8"
>
> Hi,
> I am currently writing a small library. I will provide a small web-api for
> it, however I have some colleagues who neither have experience in haskell,
> nor in web-dev.
> Also they maybe want to produce programs using my library without internet
> / docker / etc.
>
> So in addition I'd like to provide the library "wrapped" for other
> languages, especially python, but maybe java as well.
> These wrappers should do nothing except invoking their pardons on the
> library, and should somewhat contain the library.
>
> What is the common way to do this?
> I've seen "hyphen" as a super heavyweight solution, and I've seen people
> starting the haskell library listening on system-pipes.
> I don't feel that these are the "best" solutions, atleast for my
> intention.
>
> best regards
> Leonhard
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> ------------------------------
>
> Message: 2
> Date: Thu, 28 Nov 2019 16:43:30 +0100
> From: Simon Jakobi <simon.jak...@googlemail.com>
> To: Leonhard Applis <leonhard.app...@protonmail.com>, The
> Haskell-Beginners Mailing List - Discussion of primarily
> beginner-level topics related to Haskell <beginners@haskell.org>
> Subject: Re: [Haskell-beginners] Providing Haskell Libraries wrapped
> for other Languages
> Message-ID:
> <CAGtp2ShEN3HqQb2GAsPniZecStDSkqunUOz=
> tg7ou3tatrx...@mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Hi Leonhard,
>
> I don't have any experience with calling Haskell from other languages
> but I am aware of this project:
>
> https://github.com/nh2/call-haskell-from-anything
>
> I hope it's useful to you.
>
> Cheers,
> Simon
>
> Am Do., 28. Nov. 2019 um 15:15 Uhr schrieb Leonhard Applis
> <leonhard.app...@protonmail.com>:
> >
> > Hi,
> >
> > I am currently writing a small library.
> > I will provide a small web-api for it, however I have some colleagues
> who neither have experience in haskell, nor in web-dev.
> > Also they maybe want to produce programs using my library without
> internet / docker / etc.
> >
> > So in addition I'd like to provide the library "wrapped" for other
> languages, especially python, but maybe java as well.
> > These wrappers should do nothing except invoking their pardons on the
> library, and should somewhat contain the library.
> >
> > What is the common way to do this?
> >
> >
> >
> > I've seen "hyphen" as a super heavyweight solution, and I've seen people
> starting the haskell library listening on system-pipes.
> > I don't feel that these are the "best" solutions, atleast for my
> intention.
> >
> > best regards
> > Leonhard
> > _______________________________________________
> > Beginners mailing list
> > Beginners@haskell.org
> > http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 29 Nov 2019 10:55:35 +0000
> From: PICCA Frederic-Emmanuel
> <frederic-emmanuel.pi...@synchrotron-soleil.fr>
> To: "The Haskell-Beginners Mailing List - Discussion of primarily
> beginner-level topics related to Haskell" <beginners@haskell.org>
> Subject: [Haskell-beginners] strange error inside a case
> Message-ID:
> <
> a2a20ec3b8560d408356cac2fc148e53017d83a...@sun-dag3.synchrotron-soleil.fr>
>
> Content-Type: text/plain; charset="Windows-1252"
>
> Hello, I aheve some code whcih look like this
>
> thumbnail' :: (MonadIO m, MonadReader Beamline m, MonadThrow m) =>
> ThumbnailInput -> m ()
> thumbnail' (ThumbnailInput col) = do
> cwd <- toResultsPath "thumbnail" col
> let shakeFiles' = cwd </> $(mkRelDir ".shake/")
> let shakeReport' = shakeFiles' </> $(mkRelFile "report.html")
>
> liftIO $ shake shakeOptions{ shakeFiles=fromAbsDir shakeFiles'
> , shakeReport=[fromAbsFile shakeReport']
> , shakeVerbosity=Diagnostic
> } $ do
> let uploaded = fromAbsFile $ cwd </> $(mkRelFile "thumbnail.uploaded")
>
> want [uploaded]
>
> -- (Rule 1) merge the image files
> uploaded %> \_out -> do
> -- need [xml]
> masters <- liftIO $ expectedInputFiles col
> liftIO $ hdf2mergedcbf' (head masters) 1 1
> liftIO $ case col of
> (SomeDataCollection SCollect SHdf5 _) -> hdf2mergedcbf'
> (head masters) 1 1
> (SomeDataCollection SCollect SHdf5' _) -> undefined --
> hdf2mergedcbf' (head masters) 1 1
> (SomeDataCollection SCaracterization SHdf5 _) -> undefined
> (SomeDataCollection SCaracterization SHdf5' _) -> undefined
> _ -> error "show not
> arrive here !!!"
>
> -- hdf2mergedcbf
> -- command [] "touch" [uploaded]
> return ()
>
>
> When I try to compile it, it give me this error
>
> • Couldn't match type ‘a0’ with ‘()’
> ‘a0’ is untouchable
> inside the constraints: f ~ 'ISPyB.DataCollection.Hdf5
> bound by a pattern with constructor:
> SHdf5 :: SCollectSourceFormat
> 'ISPyB.DataCollection.Hdf5,
> in a case alternative
> at src/Thumbnail.hs:180:38-42
> Expected type: IO a0
> Actual type: IO ()
> • In the expression: hdf2mergedcbf' (head masters) 1 1
> In a case alternative:
> (SomeDataCollection SCollect SHdf5 _)
> -> hdf2mergedcbf' (head masters) 1 1
> In the second argument of ‘($)’, namely
> ‘case col of
> (SomeDataCollection SCollect SHdf5 _)
> -> hdf2mergedcbf' (head masters) 1 1
> (SomeDataCollection SCollect SHdf5' _) -> undefined
> (SomeDataCollection SCaracterization SHdf5 _) -> undefined
> (SomeDataCollection SCaracterization SHdf5' _) -> undefined
> _ -> error "show not arrive here !!!"’
> |
> 180 | (SomeDataCollection SCollect SHdf5 _) ->
> hdf2mergedcbf' (head masters) 1 1
> |
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
>
> What I do not understand is how to fix this since it seems that
>
> liftIO $ hdf2mergedcbf' (head masters) 1 1 works out of the case
>
> thanks for your help
>
> Frederic
>
> ------------------------------
>
> Message: 4
> Date: Fri, 29 Nov 2019 12:29:23 +0100
> From: Sylvain Henry <sylv...@haskus.fr>
> To: <beginners@haskell.org>
> Subject: Re: [Haskell-beginners] strange error inside a case
> Message-ID: <7c062774-ff78-569a-fba5-543eccf7c...@haskus.fr>
> Content-Type: text/plain; charset="utf-8"; format=flowed
>
> Hello,
>
> What is the type of hdf2mergedcbf' ?
>
> Does it work if you write `void (hdf2mergedcbf' (head masters) 1 1)` ?
>
>
> On 29/11/2019 11:55, PICCA Frederic-Emmanuel wrote:
> > Hello, I aheve some code whcih look like this
> >
> > thumbnail' :: (MonadIO m, MonadReader Beamline m, MonadThrow m) =>
> ThumbnailInput -> m ()
> > thumbnail' (ThumbnailInput col) = do
> > cwd <- toResultsPath "thumbnail" col
> > let shakeFiles' = cwd </> $(mkRelDir ".shake/")
> > let shakeReport' = shakeFiles' </> $(mkRelFile "report.html")
> >
> > liftIO $ shake shakeOptions{ shakeFiles=fromAbsDir shakeFiles'
> > , shakeReport=[fromAbsFile shakeReport']
> > , shakeVerbosity=Diagnostic
> > } $ do
> > let uploaded = fromAbsFile $ cwd </> $(mkRelFile
> "thumbnail.uploaded")
> >
> > want [uploaded]
> >
> > -- (Rule 1) merge the image files
> > uploaded %> \_out -> do
> > -- need [xml]
> > masters <- liftIO $ expectedInputFiles col
> > liftIO $ hdf2mergedcbf' (head masters) 1 1
> > liftIO $ case col of
> > (SomeDataCollection SCollect SHdf5 _) ->
> hdf2mergedcbf' (head masters) 1 1
> > (SomeDataCollection SCollect SHdf5' _) -> undefined --
> hdf2mergedcbf' (head masters) 1 1
> > (SomeDataCollection SCaracterization SHdf5 _) -> undefined
> > (SomeDataCollection SCaracterization SHdf5' _) -> undefined
> > _ -> error "show
> not arrive here !!!"
> >
> > -- hdf2mergedcbf
> > -- command [] "touch" [uploaded]
> > return ()
> >
> >
> > When I try to compile it, it give me this error
> >
> > • Couldn't match type ‘a0’ with ‘()’
> > ‘a0’ is untouchable
> > inside the constraints: f ~ 'ISPyB.DataCollection.Hdf5
> > bound by a pattern with constructor:
> > SHdf5 :: SCollectSourceFormat
> 'ISPyB.DataCollection.Hdf5,
> > in a case alternative
> > at src/Thumbnail.hs:180:38-42
> > Expected type: IO a0
> > Actual type: IO ()
> > • In the expression: hdf2mergedcbf' (head masters) 1 1
> > In a case alternative:
> > (SomeDataCollection SCollect SHdf5 _)
> > -> hdf2mergedcbf' (head masters) 1 1
> > In the second argument of ‘($)’, namely
> > ‘case col of
> > (SomeDataCollection SCollect SHdf5 _)
> > -> hdf2mergedcbf' (head masters) 1 1
> > (SomeDataCollection SCollect SHdf5' _) -> undefined
> > (SomeDataCollection SCaracterization SHdf5 _) -> undefined
> > (SomeDataCollection SCaracterization SHdf5' _) -> undefined
> > _ -> error "show not arrive here !!!"’
> > |
> > 180 | (SomeDataCollection SCollect SHdf5 _) ->
> hdf2mergedcbf' (head masters) 1 1
> > |
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> >
> >
> > What I do not understand is how to fix this since it seems that
> >
> > liftIO $ hdf2mergedcbf' (head masters) 1 1 works out of the case
> >
> > thanks for your help
> >
> > Frederic
> > _______________________________________________
> > Beginners mailing list
> > Beginners@haskell.org
> > http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
>
>
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>
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