That's what 'use 5.12' is for. That's preferred over 'use feature qw(:5.12)', as feature.pm didn't appear before 5.10, so if you run it on 5.8, you get an error complaining about a missing feature.pm, while if you have 'use 5.12', 5.8 understands this, and tells you 5.8 isn't a high enough version.

In reply to Re^6: why doesn't "my ($a,$b)" return a list? by JavaFan
in thread why doesn't "my ($a,$b)" return a list? by LanX

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