From: "Gray, Jeff" <jeff.gray@...>
Date: 2002-05-11T05:08:57+09:00
Subject: RE: Reversing receiver and argument for commutative math operatio	ns

> |Let's say I have a class that overrides certain arithmetic 
> |operators like +
> |and *, so that
> |
> |  obj = MyClass.new(5, "some other attribute")
> |  this_obj = obj * 2    # this_obj == MyClass.new(10)
> |  that_obj = 2 * obj    # that_obj == this_obj is desired
> 
> |Is there a way to do what I'd like?
> 
> How about
> 
>    class MyClass
>      def *(x)
>        if x.type <= self.type
>          x = x.value
>        end
>        self.type.new(self.value * x)
>      end
>      def coerce(x)
>        [self.type.new(x), self]
>      end
>    end
> 							matz.

D'oh!  I was so close, but botched the definition of MyClass#*, causing the
infinite loop.

Thanks!