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wps.io post - mxas && Mooish constraints http://wps.io/2015/04/mxattributeshortcuts-now-with-moo-style-type-constraints/
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# easiest is via AttributeShortcuts | |
use MooseX::AttributeShortcuts 0.028; | |
has foo => ( | |
is => 'rw', | |
# $_ == $_[0] == the value to be validated | |
isa => sub { die unless $_[0] == 5 }, | |
); |
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