Perl 6 Deep Dive

Submethods

As we have seen, a child class receives all the public methods that the base class defines. In some cases, this is not desired. Making the method private is also not always a solution, as you may want to call it on the object of the base class.

Perl 6 allows so-called submethods. They are not inherited. Let us learn about them in a small example:

class Parent {    method meth() {        say 'meth()';    }    submethod submeth() {        say 'submeth()';    }}class Child is Parent {}

Now, create two objects:

my $o1 = Parent.new;my $o2 = Child.new;

In the Parent class, there are two methods that can be called on the object of that type:

$o1.meth();    # meth()$o1.submeth(); # submeth()

In the Child class, only the meth method is available:

$o2.meth(); # ...