Re^4: Psychic Disconnect and Object Systems

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!

Comment on Re^4: Psychic Disconnect and Object Systems

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Re^5: Psychic Disconnect and Object Systems by ikegami (Patriarch) on Apr 15, 2011 at 22:47 UTC
"Attribute (%s) of class %s has no associated methods (did you mean to provide an "is" argument?)" Basically, omitting "`is`" (or equivalent) doesn't make the attribute read-only, it makes it neither readable nor writable! and "is" doesn't seem to be a mandatory option Remember how I said `is` is just a shortcut for something else? It's the lack of getters that actually triggers the error.	[reply] [d/l] [select]
Re^5: Psychic Disconnect and Object Systems by ikegami (Patriarch) on Apr 15, 2011 at 22:52 UTC
"Attribute (%s) of class %s has no associated methods (did you mean to provide an "is" argument?)" Basically, omitting "`is`" (or equivalent) doesn't make the attribute read-only, it makes it neither readable nor writable! and "is" doesn't seem to be a mandatory option Remember how I said `is` is just a shortcut for something else? It's the lack of getters that actually triggers the error.	[reply] [d/l] [select]