Sub::Context (by chromatic) exists on CPAN and does context sensitive dispatch; I think your suggestions would muddy the existing namespace. Since this is attribute based, and people are already aware of wantarray and probably Want, I'd suggest some variation of: Attribute::Want or Sub::Attribute::Want, or maybe using 'context': Attribute::Context.

In reply to Re: Re: RFC: Sub::Attributes -- alter subroutine context behavior with attributes by Anonymous Monk
in thread RFC: Sub::Attributes -- alter subroutine context behavior with attributes by Ovid

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