Modern::Perl - enable all of the features of Modern Perl with one import Modern Perl programs use several modules to enable additional features of Perl and of the CPAN. Instead of copying and pasting all of these use lines, instead write only one: use Modern::Perl; This enables the strict and warnings pragmas, as well as all of the features available in Perl 5.10. It also enables C3 method resolution order as documented in perldoc mro and loads IO::File and IO::Handle so that you may call methods on filehandles. In the future, it may include additional core modules and pragmas (but is unlikely to include non-core features).