From: Joel VanderWerf <vjoel@...>
Date: 2002-01-01T02:34:10+09:00
Subject: [ruby-talk:29874] Re: Proc.class vs yield

David Alan Black wrote:

> Hmmm... I wonder whether part of what you're not liking is the fact
> that the {} operator is overloaded: it's a block constructor and also
> a hash constructor.  So there needs to be a way to deal with things
> like:
> 
>   some_method( { "hi" }, { "one" => 1 }, { |x| puts x })

There is still some room to overload {} a bit more. The syntax

  some_method {|x| x+1} {|y| y-1}

has no meaning currently--it's a parse error. Could this syntax be given
a meaning so that

  def some_method(&b1, &b2)
  end

allowed the method to use both blocks?

I'm not sure I'd propose this for RCR, since I haven't seen a use for it
that couldn't be handled some other way. But still it would be kinda
nice. It would allow you to write control structures a la Tcl:

  while {<test>} {
    <do stuff>
  }