1Mo::option(3)         User Contributed Perl Documentation        Mo::option(3)
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Name

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

9           package Foo;
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11           use Mo qw'option';
12           has this => ( option => 1 );
13           has that => ( option => 1 );
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15           my $f = Foo->new;
16           $f->this->that(0)->do_something;
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18           my $this = $f->read_this;   # 1
19           my $that = $f->read_that;   # 0
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21           $f->do_something if $f->read_this;
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Description

24       This feature lets an accessor act as an option, that is intended to
25       have a value of 1 or 0. Simply calling the accessor sets the value to
26       1, and returns the instance so you can chain to the next method.
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28       To get the value of the attribute, call the "read_<name>" accessor.
29       Here's a trick to do that when you are not assigning the value to
30       anything:
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34perl v5.34.0                      2021-07-22                     Mo::option(3)