[...]

> It's not particularly a property of method_missing--you can't even 
> define a method to do this:
>
> irb(main):002:0> self.foo=(1,2)
> SyntaxError: compile error
> (irb):2: syntax error
> self.foo=(1,2)
>               ^
>          from (irb):2

I should have tested the obvoius, thanks for this out.

but something like method=(1,2) could be handy, for example for
assigning complex numbers.

Thanx,

Patrick