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From: "Ludovic Courtès" <ludo@gnu.org>
To: Josselin Poiret <dev@jpoiret.xyz>
Cc: guix-devel@gnu.org
Subject: Re: Viewing derivation output in the store
Date: Thu, 28 Apr 2022 09:30:26 +0200	[thread overview]
Message-ID: <87pml1fywd.fsf@gnu.org> (raw)
In-Reply-To: <87v8v2g9tm.fsf@jpoiret.xyz> (Josselin Poiret's message of "Thu,  21 Apr 2022 09:44:05 +0200")

Hi!

Josselin Poiret <dev@jpoiret.xyz> skribis:

> As an aside: is there anything preventing us from having do notation à
> la Haskell?  This could help bridge mlet and mbegin with >>=, which in
> its current form is impractical.  Here's what it could look like:
>
> (mdo %store-monad
>   (drv <- (gexp-derivation "myderivation" test-gexp))
>   (output <- (return (derivation->output-path drv)))
>   (built-derivations (list drv))
>   (return (format #t "~a~%" output)))

I guess we could do that, though it seems to me like a marginal
improvement over ‘mbegin’ and ‘mlet’.

Ludo’.


      parent reply	other threads:[~2022-04-28  7:56 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-20 15:40 Viewing derivation output in the store Brian Cully
2022-04-20 19:42 ` Maxime Devos
2022-04-21  7:44   ` Josselin Poiret
2022-04-21 11:50     ` Brian Cully
2022-04-28  7:30     ` Ludovic Courtès [this message]

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