No you don't. You get an error.
Here we go... Which error? Well, let's look at the docs...
has $name|@$names => %options

This will install an attribute of a given $name into the current class. If the first parameter is an array reference, it will create an attribute for every $name in the list. The %options are the same as those provided by Class::MOP::Attribute, in addition to the list below which are provided by Moose (Moose::Meta::Attribute to be more specific):

is => 'rw'|'ro'

The is option accepts either rw (for read/write) or ro (for read only). These will create either a read/write accessor or a read-only accessor respectively, using the same name as the $name of the attribute.

If you need more control over how your accessors are named, you can use the reader, writer and accessor options inherited from Class::MOP::Attribute, however if you use those, you won't need the is option.

Looks like "has" takes a scalar and a hash of options, and "is" doesn't seem to be a mandatory option. You've got me stumped!

In reply to Re^4: Psychic Disconnect and Object Systems by educated_foo
in thread Psychic Disconnect and Object Systems by John M. Dlugosz

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