9.6.4 Accessor methods

A method defined with the get or set keyword adds a get or set method trait to the instance or static traits of the defining class object. Accessor methods are called when the name of the accessor is used in a reference that reads or writes the value of that name.

class A 
{
    private var _x
    function get x() { return _x }
    function set x(v) { _x = v }
}
var a  = new A
a.x = 10       // calls set accessor of A
trace(a.x)     // traces 10, calls get accessor of A

Accessor methods are very similar in definition to regular methods. The differences are expressed by the following error conditions:

Get methods must specify no parameters.
Set methods must specify just one parameter.
Get methods must return a value.
Set methods have a result type void by default.
Set methods must not specify a result type other than void.
Get methods must not specify the result type void.
If both a get and set method is defined with the same name, the parameter type of the set method and the result type of the get method must match.

NOTE

Accessors may only be defined at the top level of a class. They must not be nested inside another method or defined outside of a class.

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