From: George Ogata <g_ogata@...>
Date: 2006-01-02T16:22:56+09:00
Subject: Re: Can't change the value of self

Wilson Bilkovich <wilsonb@gmail.com> writes:

> Speaking of methods.. is there a way to do:
> class Something
>   def <<(a, b)
>     # do something with a and b
>   end
> end
>
> s = Something.new
> s << 'a', 'b'
> results in a syntax error.
>

You could do s.<<('a', 'b'), but it seems unrubyish.  Perhaps you
could settle for:

  s << ['a', 'b']

> Is that another of those YACC limitations?

Hmmm, I don't know if it's a limitation, but it could get confusing.
Consider:

  four, three = 1 << 2, 3
  arr = [x << 1, x << 2]

And if you do it for `<<', then what about `+', `-', `%'?  If you do
do it for those, then you start to lose really basic stuff like:

  arr = [a + 1, b + 1]
  b, a = a % b, b until b == 0