On Fri, 2017-07-21 at 11:25 +0000, Jaroslav Hajtmar wrote:
> Hello ConTeXist.
> Is there any way to evaluate of contents of two macros as I am showing in my
> minimal example?
> I know, that problem is in expansion, but I dont know to resolve it.
> My minimal example consist of piece lua code, because I am solving my problem
> in mixed codes (TeX
> & Lua)
Something similar has been asked before and it is not possible. The
interfaces.definecommand
function defines a new macro using \protected\def. To compare as equal in a
\doif context, both
operands have to _expand_ to the same thing (here 123). Here \mymacro is not
expandable and thus
only \doifelse{\mymacro}{\mymacro} will ever compare true.
Furthermore, scanning for optional arguments (i.e. [...]) is inherently
non-expandable. To get
something expandable you must at least switch to mandatory arguments (i.e.
{...}). Still, using
interfaces.definecommand will still not be possible. I believe that scanning
arguments is better
done on the macro level than in Lua, but that's just my opinion.
> Thanx for help.
> Jaroslav Hajtmar
>
>
> \starttext
>
> \startluacode
> interfaces.definecommand ("domymacro", {
> arguments = { { "option", "string" } },
> macro = function (opt_1)
> if #opt_1>0 then
> context(opt_1)
> else
> context("123")
> end
> end
> })
> interfaces.definecommand("mymacro", {
> macro = function ()
> context.dosingleempty()
> context["domymacro"]()
> end
> })
> \stopluacode
>
> \def\myothermacro{123}
>
> \hairline
>
> \mymacro[123]
>
> \mymacro
>
> \myothermacro
>
> \hairline
>
> \doifelse{\mymacro}{\mymacro[123]}{equal content}{not equal content}
>
> \doifsamestringelse{\mymacro}{\mymacro[123]}{equal content}{not equal content}
>
> \doifinstringelse{\mymacro}{\mymacro[123]}{equal content}{not equal content}
>
> \doifincsnameelse{\mymacro}{\mymacro[123]}{equal content}{not equal content}
>
>
> \hairline
>
> \doifelse{\mymacro}{\myothermacro}{equal content}{not equal content}
>
> \doifsamestringelse{\mymacro}{\myothermacro}{equal content}{not equal content}
>
> \doifinstringelse{\mymacro}{\myothermacro}{equal content}{not equal content}
>
> \doifincsnameelse{\mymacro}{\myothermacro}{equal content}{not equal content}
>
>
>
> \stoptext
>
>
>
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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive : https://bitbucket.org/phg/context-mirror/commits/
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