Resends

  • Used to invoke overridden methods: 
    	at: key = (resend.at: hash: key)

    Syntax for different message types: 
    		resend.unary 
		resend.+ arg	"binary" 
		resend.foo: bar	"keyword"
  • Directed resend chooses between multiple parents: 
    	(|
		parent1* = (| foo = 3 |).	
		parent2* = (| foo = 4 |).
		foo = (parent1.foo + parent2.foo)
	|)

Resends

Self has a resend mechanism, using the keyword resend. This enables an overriding method to invoke the overridden method.

The syntax used is to attach the message selector to resend with a period, e.g.: 

	at: key = (resend.at: hash: key)
This example defines a method at: which invokes an overridden version of at:, passing it the hash of its argument.

When an object has multiple parents, a directed resend can be used to disambiguate conflicting inherited slots. In this case resend is replaced by the name of the parent slot: 

	(|
		parent1* = (| foo = 3 |).	
		parent2* = (| foo = 4 |).
		foo = (parent1.foo + parent2.foo)
	|)

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