Yup. 

---------------------------------------------------------- Module#free
+ze
     mod.freeze
----------------------------------------------------------------------
+--
     Prevents further modifications to _mod_.

[download]

And there's also Object#freeze which prevents modification of individual instances (preventing you from adding singleton methods to them).

In reply to Re^4: OO in Perl 5: still inadequate by Fletch
in thread OO in Perl 5: still inadequate by Aristotle

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