That syntax declares an attribute. I'm not sure where they are discussed in the Perl documentation - maybe only within the attributes pragma.

If you want to learn how you can (ab)use attributes yourself, Attributes::Handlers is the best wrapper I guess.

In reply to Re: Arcane syntax question (Catalyst/OOPerl) by Corion
in thread Arcane syntax question (Catalyst/OOPerl) by bitstream

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