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From: Attila Lendvai <attila@lendvai.name>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: guix-devel <guix-devel@gnu.org>
Subject: Re: using an SRFI that is not available in Guile
Date: Tue, 18 Jan 2022 17:06:28 +0000	[thread overview]
Message-ID: <SdytAhEJA2w1yf10t0j6doraN8YIbONJ4Y3FCznPJC-PINBfz45n2oRB_mAOza4qVrMYUXOEZj-x_-mH6GIj4nIu95_ri_2eEHdBZyeN_e4=@lendvai.name> (raw)
In-Reply-To: <87iluhf5ci.fsf@gnu.org>

> There’s no widespread “Maybe” idiom in Scheme; or rather, people use
> TYPE | #f as a way to approximate “Maybe”. It’s not ideal, primarily
> because appropriate handling is not statically checked. Yet, that’s
> what we have and I’m not convinced adding SRFI-189 to the mix would
> bring enough of an improvement to justify it.
>
> Thoughts?


configurations are full of boolean fields, where #f is a valid value.

to represent unset fields, we would essentially need to implement half
of srfi-189 (Maybe and Nothing), and in a potentially buggy way
(e.g. using a symbol like 'disabled to represent an unset field value
(i.e. the current solution) clashes with a field type of symbol?).

i don't think it's worth rolling our own when an srfi covers what we
need.

--
• attila lendvai
• PGP: 963F 5D5F 45C7 DFCD 0A39
--
“Go find yourself first, so you can find me.”
	— Rumi (1207–1273)



  reply	other threads:[~2022-01-18 17:37 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-12 16:46 using an SRFI that is not available in Guile Attila Lendvai
2022-01-12 17:01 ` Attila Lendvai
2022-01-12 17:09 ` Maxime Devos
2022-01-13  9:55   ` Attila Lendvai
2022-01-13 10:49     ` Maxime Devos
2022-01-13 18:20       ` Attila Lendvai
2022-01-13 20:48         ` Attila Lendvai
2022-01-14 12:02         ` Maxime Devos
2022-01-17 13:45           ` Attila Lendvai
2022-01-13 10:53     ` Maxime Devos
2022-01-13 10:56       ` Maxime Devos
2022-01-18 15:09 ` Ludovic Courtès
2022-01-18 17:06   ` Attila Lendvai [this message]
2022-01-19 10:34     ` Ludovic Courtès
2022-01-21 13:59       ` Attila Lendvai
2022-01-24 15:41         ` Ludovic Courtès
2022-01-24 23:02           ` Attila Lendvai
2022-02-05 11:13             ` Ludovic Courtès

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