On Tue, 4 Sep 2012, Marco Patzer wrote:
Hi,
please have a look at the following example:
\starttext
\def\cmd{%
\def\mymacro{Foobar}
\newtoks\mytoks
\mytoks={mytoks}}
\startluacode
context.cmd()
context.mymacro()
-- this fails
-- context(tex.toks.mytoks)
\stopluacode
-- this works
\startluacode
context(tex.toks.mytoks)
\stopluacode
\stoptext
Why does the first call to tex.toks.mytoks fail?
Apparently the luacode environment has to be closed for cmd to be
expanded. I guess that the call to mymacro() succeeds is a quirk due
to the face that the macro is expanded later, in contrast to tokens,
dimens and counters.
Is there a command I can use within Lua to expand a macro
immediately or to expand the pending macros to be able to access the
values like the token register in the example?
Instead of
context(tex.toks.mytoks)
use
context(function () context(tex.toks.mytoks) end)
See the ConTeXt Lua Document manual for explanation.
Another question which is related:
Is there a way to access the contents of the macro from within Lua
like counters and token registers?
\starttext
\newtoks\mytoks
\mytoks={Foobar}
\startluacode
local tok = tex.toks.mytoks
-- something like this is what I have in mind
-- local mac = tex.macros.somemacro
\stopluacode
\stoptext
I am just interested in a text string, not a box with typeset
material. I guess that's more difficult, since macros are expanded
and not just simply read.
AFAIK, this is not possible.
Aditya
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