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in reply to Unusual style of documentation?

G'day LittleJack,

I've seen that notation before. I'm reasonably sure it's the same as described in "Moose::Util::TypeConstraints - Default Type Constraints".

The author of Types::Standard, tobyink, may be along later to shed further light on this.
Update: Although, he hasn't been seen prowling the cloisters in the last few months.

— Ken