require returns the last evaluated expression in the file
Only the first time:
> perl -de 0
DB<1> x require 'con'
'this is true';
0 'this is true'
DB<2> x require 'con'
DB<3> x require 'con'
I've seen people do wacky things like have "return %hash" as the last expression and do "%hash = require Foo::Bar";
So such code will break as soon as more than one use of the module is attempted from a single run. That's a bit of a shame too, since Perl could really use something along those lines.
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