From: Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Cc: Henning Hraban Ramm <texml@fiee.net>
Subject: Re: cld questions
Date: Mon, 6 Sep 2021 18:20:10 +0200 [thread overview]
Message-ID: <FE1F9199-427A-42C4-A10B-DB220176854F@fiee.net> (raw)
In-Reply-To: <FF628BF8-0A9D-4DB7-ACB2-A1FCD20518C3@fiee.net>
Another question:
I think I understood the need for function arguments.
My macro, defined with interfaces.implement, works while I call "Image" below,
but if I call "ClippedImage" (one level of indirection more), I get:
"""
tex error > tex error on line 28 in file virtual://page.nopage.1: Missing { inserted
...(no helpful output here)...
A left brace was mandatory here, so I've put one in.
"""
I can’t imagine where to put that brace.
function Image(Width, Height, filename)
context.externalfigure(
{ filename },
{
width = todimen(Width),
}
)
end
function ClippedImage(Width, Height, filename)
context.clip(
{
width = todimen(Width),
height = todimen(Height),
},
Image(Width, Height, filename)
)
end
Am 05.09.2021 um 16:27 schrieb Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl>:
>> TeX:
>> \def\Something{1cm}
>> Lua:
>> context.Something()
>
> yes (assuming you're in scope)
Then I’m out of scope.
\def is in my environment, directly before I load the Lua functions with \loadluafile.
How can I access the macros from the environment there?
>> 2) The original interface of \MyFun had two optional parameters. I couldn’t find how to do that with interfaces.implement.
>> cld-mkiv, p.151 (12.7) shows how to do lists or key=value, but not single optional args.
>
> there is "optional"
>
> and ... cld is not yet updated to lmtx in this respect so some newer features are missing
Must I then declare "string optional" etc.?
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next prev parent reply other threads:[~2021-09-06 16:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-05 10:01 Henning Hraban Ramm via ntg-context
2021-09-05 11:01 ` Hans Hagen via ntg-context
2021-09-05 14:27 ` Henning Hraban Ramm via ntg-context
2021-09-06 16:20 ` Henning Hraban Ramm via ntg-context [this message]
2021-09-06 18:00 ` Hans Hagen via ntg-context
2021-09-06 19:16 ` Henning Hraban Ramm via ntg-context
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