From: ludo@gnu.org (Ludovic Courtès)
To: Nikita Karetnikov <nikita@karetnikov.org>
Cc: bug-guix@gnu.org
Subject: Re: Enhanced 'warning'
Date: Thu, 18 Apr 2013 13:55:13 +0200 [thread overview]
Message-ID: <87sj2o59zy.fsf@gnu.org> (raw)
In-Reply-To: <871ua85t4w.fsf@karetnikov.org> (Nikita Karetnikov's message of "Thu, 18 Apr 2013 09:01:51 +0400")
Nikita Karetnikov <nikita@karetnikov.org> skribis:
>> I think it’d be nice to have a ‘warning’ procedure in (guix ui), so
>> things are uniform.
>
> It think it might be better to have a single 'warning' macro which could
> handle several cases (errors, warnings and similar things). (Actually,
> 'guix hash' should use errors, not warnings.)
Yes, you’re right.
> Here is a simplified version:
>
> (define-syntax define-output-macro
Rather: ‘define-diagnostic’.
> (syntax-rules ()
> ((_ name prefix)
> (define-syntax name
> (lambda (x)
> (syntax-case x (_ N_)
> ((name (_ str))
> (with-syntax ((prefix (datum->syntax x prefix)))
> #'(display (string-append prefix str "\n"))))
> ((name (N_ str1 str2))
> (with-syntax ((prefix (datum->syntax x prefix)))
> #'(display (string-append prefix str1 str2 "\n"))))))))))
You should reuse the body of the current ‘warning’ macro, though.
> (define-output-macro warning "warning: ")
> (define-output-macro error* "error: ")
You could use ‘report-error’ to avoid name clashes.
But I think ‘leave’ should be enough, no?
> scheme@(guile-user)> (warning (_ "foo"))
> warning: foo
>
> scheme@(guile-user)> (error* (N_ "foo" "bar"))
> error: foobar
Note that ‘N_’ is meant to be an alias for ‘ngettext’, so the above form
is invalid.
> And here is a problem... Is it possible to compose a macro (e.g.,
> 'error*') with (exit 1) without touching the internals of
> 'define-output-macro'?
What about:
(define-syntax-rule (leave args ...)
(begin
(error* args ...)
(exit 1)))
Thanks,
Ludo’.
next prev parent reply other threads:[~2013-04-18 11:55 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-01 5:06 [PATCH] Add 'guix hash' Nikita Karetnikov
2013-04-03 8:34 ` Ludovic Courtès
2013-04-05 14:04 ` Nikita Karetnikov
2013-04-05 14:14 ` Nikita Karetnikov
2013-04-05 16:15 ` Ludovic Courtès
2013-04-10 11:48 ` Nikita Karetnikov
2013-04-10 11:54 ` Ludovic Courtès
2013-04-10 12:21 ` Nikita Karetnikov
2013-04-10 17:30 ` Ludovic Courtès
2013-04-05 16:13 ` Ludovic Courtès
2013-04-09 16:28 ` Nikita Karetnikov
2013-04-11 20:35 ` Ludovic Courtès
2013-04-12 5:24 ` master: FAIL: tests/guix-package.sh (was: [PATCH] Add 'guix hash'.) Nikita Karetnikov
2013-04-12 6:48 ` master: FAIL: tests/guix-package.sh Nikita Karetnikov
2013-04-12 16:24 ` Ludovic Courtès
2013-04-18 5:01 ` Enhanced 'warning' (was: [PATCH] Add 'guix hash'.) Nikita Karetnikov
2013-04-18 5:06 ` Enhanced 'warning' Nikita Karetnikov
2013-04-18 11:55 ` Ludovic Courtès [this message]
2013-04-18 19:27 ` Nikita Karetnikov
2013-04-18 20:59 ` Ludovic Courtès
2013-04-19 20:16 ` [PATCH] ui: Add a 'define-diagnostic' macro. (was: Enhanced 'warning') Nikita Karetnikov
2013-04-20 5:48 ` [PATCH] ui: Add a 'define-diagnostic' macro Nikita Karetnikov
2013-04-20 9:10 ` Ludovic Courtès
2013-04-20 17:33 ` Nikita Karetnikov
2013-04-20 19:55 ` Ludovic Courtès
2013-04-20 9:09 ` Ludovic Courtès
2013-04-21 18:14 ` [PATCH] Add 'guix hash' Nikita Karetnikov
2013-04-21 19:02 ` Ludovic Courtès
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