Perl v5.28 has a few new features and several removals of old features that you shouldn’t have been using anyway (so I’m not going to mention them).
- The zero-width heredoc delimiter is fatal
- Beware of the removal of when in Perl v5.28 (now reverted but not dead)
- In-place editing doesn’t replace the original file until you are done
- Regex alpha assertions give maintainers a better clue about which feature you’re using
deletenow works on key/value slices.
- Subroutines no longer need type globs.
- Opening the same symbol as both a file and directory handle is no longer allowed
- Avoid mixed Unicode scripts (a data spoofing tactic)
- Initialisation of aggregate state variables
- String- and numeric-specific bitwise operators introduced in v5.22 are no longer experimental
- Unquoted bare heredocs are now fatal
- Updated to Unicode 10