It would sometimes be useful to write conditional code that depends on boolean values defined in a parent package. E.g. the \pdfcomment package has the boolean “final”, which disables all PDF annotations in the document (\usepackage[final]{pdfcomment}). There is some other logic in my document that should also be disabled when that boolean is true. I tried simply using:
\ifpc@gopt@final\else%
…code that should not run when final is true…
\fi
pdflatex gives: “Undefined control sequence”
More generally, many draft options are often useful for controlling logic within the document for which a parent uses a draft option. Also when defining a custom letterhead in the scrlttr2 class there are booleans for many items that may or may not be wanted in the letterhead.
Has anyone managed to read a parent boolean?
(update) This thread gives useful options for many situations. But it does not completely answer the question because there are non-draft related booleans.
SOLVED
The \ifpc@gopt@final is reachable but only inside a \makeatletter stanza. Thus:
\makeatletter
\ifpc@gopt@final\else%
…code that should not run when final is true…
\fi
\makeatother