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