Injections / Extensions

Here's an idea for injecting methods into dynamic objects. Create an Injector class that injects a closure into an object's prototype property.

Injects could be defined at the class level:

package currency
{
    public class Money extends Object
    {
        private var _value:Number;
        
        public function Money(value:Number)
        {
            _value = value;
        }
    }
}

public class Currency
{
    Extension.inject(Number, "dollars", function():Money
    {
        return new Money(this);
    });
}

express(Currency);

// if non-strict:
var amount:Money = (5).dollars();

// strict requires a cast to object:
amount = (5 as Object).dollars();