Re: Why limit class def to a constant or colon node?

On 4/4/07, Hugh Sasse <[e-mail]> wrote:
> Also makes me think: what about non-anonymous singleton classes?
>
> irb(main):002:0> class X << x
> irb(main):003:1>   def hello
> irb(main):004:2>     puts "hi"
> irb(main):005:2>   end
> irb(main):006:1> end
> SyntaxError: compile error
> (irb):2: syntax error, unexpected tLSHFT, expecting '<' or '\n' or ';'
> class X << x
>           ^
>         from (irb):6
>         from :0
> irb(main):007:0>
>
> Fair enough! :-)  That would produce some weird prototype based OO
> if it were allowed, though.

Not too far off already though:

Proto = Class.new(Class)
def Proto.clone; Class.new(self) end

A = Proto.clone
def A.test
  puts 42
end

A.test #=> 42

class << A
  def almost
    puts :there
  end
end

A.almost #=> :there

So ideally we might have:

class A << Proto.clone
  ...
end

Interesting thought, though I wonder how much longer Class.new(Class)
will work since class Proto < Class doesn't work.

Brian.