bug#46889: cperl-mode: Fix indentation issues [PATCH]

[Harald Jörg]

Hello Emacs-Maintainers,

this started out as working on Bug#42169 but it soon became clear that
there's more lurking in CPerl mode's indentation code, so I decided to
open a new issue here.

In 7b2448ae (cperl-mode: Improve detection of index entries for imenu),
committed on Feb 17, the imenu part of Bug#42169 has been fixed.  This
commit now fixes the indentation after a package which brings its own
block.

Therefore, the patch in this report should finally fix Bug#42169.

As a by-catch, the new code fixes the ancient Bug#8077.

This patch also fixes the first part of Bug#11733.  The "other
indentation bug" reported in Bug#11733 (using a colon as a Perl regexp
terminator) is a different story and not covered by this patch.

Also fixed now (without known bug number): labels with a space before,
or a comment after the colon are now correctly indented and fontified.

With this patch in effect, CPerl mode should finally have caught up with
Perl 5.30!

Many thanks to Mattias Engdegård for his patient explanations how rx
expressions can be used without breaking compatibility to Emacs 26.1.
Until now, this allowed two ugly regexp literals to be eliminated.
-- 
Cheers,
haj

0001-cperl-mode-fix-indentation-issues.patch
Description: cperl-mode: Fix indentation issues