From: "Jairo A. del Rio" <jairoadelrio6@gmail.com>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Issue with \handletokens\with and Lua-defined macros
Date: Mon, 29 Mar 2021 03:54:06 -0500 [thread overview]
Message-ID: <CAKyqqaaosU74HZtOpbUVPeUXhAXRrQzdXknze6GACTpsXk2vsg@mail.gmail.com> (raw)
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Hi list! See the following example:
\startluacode
userdata = userdata or {}
--Toy example
--My actual function receives an argument, but the problem remains the same
userdata.myfunction = function()
return
"343327959841638047651959775267761420323" ..
"657838053757849835434002826851807933276" ..
"324327913964298509889902373459201557839" ..
"84828001486412574060553756854137069878601"
end
interfaces.implement{
name = "myfunction",
public = true,
actions =
function ()
context(userdata.myfunction())
end
}
\stopluacode
\def\colorfulnumbers#1{\colored[h=\luaexpr{40*#1},s=1,v=1]{#1}\ }%
\starttext
%It doesn't work
%\handletokens{\myfunction}\with\colorfulnumbers
\expandafter\handletokens\expandafter{\myfunction}\with\colorfulnumbers
\stoptext
As readily seen from my example, I want to color each figure of the numbers
generated by a Lua function. However, the use of \expandafter's is
cumbersome in this case. I don't want to loop over the result in Lua
because I want to be able to apply \handletokens...\with... (or another
macro with a similar purpose) with different macros at the TeX end once Lua
has delivered results. How should I do it in ConTeXt?
Thanks in advance. Cordially,
Jairo
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next reply other threads:[~2021-03-29 8:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 8:54 Jairo A. del Rio [this message]
2021-03-29 17:16 ` Hans Hagen
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