Re: imenu fails in mode without comment-start-skip defined

[Richard Stallman]

    > Could someone who already knows these things please write about them?

    I think basically all it needs is to say that it's a more efficient
    version of parse-partial-sexp (using a cache) with the restrictions
    mentioned in the doc string (and any others?).  Warn that it might
    clobber the match data via syntax-begin-function and maybe also
    mention syntax-ppss-context.

Could you write some text to insert?