prolog-comment-limits
prolog-comment-limits is a compiled Lisp function in `prolog.el
'.
(prolog-comment-limits)
Return the current comment limits plus the comment type (block or line).
The comment limits are the range of a block comment or the range that
contains all adjacent line comments (i.e. all comments that starts in
the same column with no empty lines or non-whitespace characters
between them).