Dear gurus,
This question concerns both MKII and MKIV (I need the functionality in
both, even though I will try to rewrite the MKIV part as soon as I
have time).
I have a command:
\mycommand[a][newparam=value]
with more or less the following definition:
\def\mycommand[#1][#2]{%
\getparameters[@@mycommand@#1@][#2]
% ... some extra code ...
}
However I used to use
\mycommand[a][oldparam=value]
and now I would like to switch the syntax to
\mycommand[a][newparam=value]
but I would like the oldparam to keep working normally.
I will read the value with \@@mycommand@a@newparam.
My question: what is the most elegant value to do that?
I can imagine something like
\def\mycommand[#1][#2]{%
\undefinecommand\@@mycommand@a@oldparam % pseudocode
\getparameters[@@mycommand@#1@][#2]
\doifdefined{\@@mycommand@a@oldparam}
\let\@@mycommand@a@newparam\@@mycommand@a@oldparam
% ... some extra code ...
}
but there is most probably some more elegant solution to that?
Thank you,
Mojca
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