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From: "Ludovic Courtès" <ludo@gnu.org>
To: Ricardo Wurmus <rekado@elephly.net>
Cc: 34948@debbugs.gnu.org
Subject: [bug#34948] [PATCH 1/3] records: Allow thunked fields to refer to 'this-record'.
Date: Sat, 23 Mar 2019 17:05:10 +0100	[thread overview]
Message-ID: <87a7hlzidl.fsf@gnu.org> (raw)
In-Reply-To: <87y35660fw.fsf@elephly.net> (Ricardo Wurmus's message of "Fri, 22 Mar 2019 22:53:07 +0100")

I should mention that there are other craaaazzy applications of this!

For example, the ‘self-native-input?’ field of <package> becomes
useless, because now you can write:

  (package
    ;; …
    (native-inputs
      ;; Add self as a native input when cross-compiling.
      `(,@(if (%current-target-system)
              `(("this" ,this-record))
              '())
        ;; …
        )))

I think there are other cases in package definitions where this can be
useful, possibly things like the ‘make-lua-*’ procedures that we have.

Ludo’.

  parent reply	other threads:[~2019-03-23 16:06 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-22 17:21 [bug#34948] [PATCH 0/3] Turn 'essential-services' into an <operating-system> field Ludovic Courtès
2019-03-22 17:27 ` [bug#34948] [PATCH 1/3] records: Allow thunked fields to refer to 'this-record' Ludovic Courtès
2019-03-22 17:27   ` [bug#34948] [PATCH 2/3] accounts: Add default value for the 'home-directory' field of <user-account> Ludovic Courtès
2019-03-22 17:27   ` [bug#34948] [PATCH 3/3] system: Add 'essential-services' field to <operating-system> Ludovic Courtès
2019-03-25 20:42     ` Arun Isaac
2019-03-25 23:02       ` bug#34948: " Ludovic Courtès
2019-03-26  6:58         ` [bug#34948] " Arun Isaac
2019-03-22 21:53   ` [bug#34948] [PATCH 1/3] records: Allow thunked fields to refer to 'this-record' Ricardo Wurmus
2019-03-23 15:18     ` Ludovic Courtès
2019-03-23 16:05     ` Ludovic Courtès [this message]
2019-03-30 10:37       ` Ludovic Courtès
2019-03-30 14:20       ` Ludovic Courtès

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