http://www.perlmonks.org?node_id=896223


in reply to Re^2: Why version strings? (uh, no)
in thread Why version strings?

There is no "I wrote this on 5.10.1 so I can't be sure it will work on other versions" feature.

Yet.

There can only be such a feature if sufficient numbers of Perl 5 programmers stop pretending that perl is completely forward and backwards compatible without explicitly including version numbers in all files.