On 10/23/2022 12:34 AM, Eduardo Ochs wrote:
Hi list,
how do I use the function token.expand, that is (very) briefly
mentioned here?
http://mirrors.ibiblio.org/CTAN/systems/doc/luatex/luatex.pdf#page=224
I've put this in a .tex file
\def\foo{FOO}
\def\bletch#1{BL#1ETCH}
and entered a Lua REPL. All the "print"s below give meaningful
results,
print(token.get_macro("foo"))
print(token.get_macro("bletch"))
print(token.get_meaning("foo"))
print(token.get_meaning("bletch"))
print(token.create("bletch"))
print(token.create("bletch").expandable)
and the last one says "true"... but I've tried to call token.expand
with several kinds of arguments, and in all cases I got this error,
! Undefined control sequence.
\repl ->\directlua { print(); run_repl2_now() }
where \repl is the tex macro that I use to run my Lua REPL...
token.expand is rather useless and a left-over from earlier mechanisms
that have been replaced (it's now kind of hard to make an example).
Anyway, you can best push a token into the input with tex.print:
\def\bletch#1{BL#1ETCH}
\directlua{tex.print(token.create("bletch"))}xxxxx
\directlua{tex.print(token.create("bletch"))}{xxx}xx
Hans
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