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Mo::option(3)	      User Contributed Perl Documentation	 Mo::option(3)

       Mo::option - Allow an attribute to be a chainable, boolean option.

	   package Foo;

	   use Mo qw'option';
	   has this => ( option	=> 1 );
	   has that => ( option	=> 1 );

	   my $f = Foo->new;

	   my $this = $f->read_this;   # 1
	   my $that = $f->read_that;   # 0

	   $f->do_something if $f->read_this;

       This feature lets an accessor act as an option, that is intended	to
       have a value of 1 or 0. Simply calling the accessor sets	the value to
       1, and returns the instance so you can chain to the next	method.

       To get the value	of the attribute, call the "read_<name>" accessor.
       Here's a	trick to do that when you are not assigning the	value to

perl v5.32.0			  2016-07-06			 Mo::option(3)

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