The leading "-" does what it does everywhere else in Perl too, so looking at use only tells you where to look next, because what you see is the use Module LIST form. So you will next be looking at how Perl parses a list, and elements of a list.

See perlop on symbolic unary operators, which explains that -bareword is the same as "-bareword". So your expression above would be identical to:

use App::Cmd::Setup "-app";

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In reply to Re: What does "-" in a use statement do? by Corion
in thread What does "-" in a use statement do? by nysus

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