r package - Conditional HTML entities in R documentation

Question

I wish to include some non-ascii characters in the documentation for an R package, specifically the diacritic ?. I am using roxygen2, so must not include any non-ASCII characters in the .R file from which the documentation will be generated. Moreover, the non-ASCII characters may not be available to the software that compiles a PDF manual, so I wish to specify a safe fallback for the PDF documentation.

The obvious approach seems to be to conditionally display HTML entities, i.e. ifelse{html}{ă}{a}, but the entities are evidently escaped at some point: the .rd file reads ă where I expect an ?.

Bonus points for answers that can be applied to diacritics included from REFERENCES.bib via the insertRef macro...

question from:https://stackoverflow.com/questions/65935676/conditional-html-entities-in-r-documentation

Answer 1

Waitting for answers