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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