RCR 138: Make def return something useful

This however would need public/protected/private changed a bit so they will take a Method as their parameter and use its Symbol.

...but Methods don't have Symbols.

why not ? In the Ruby User Guide you can see an example from matz, using the same symbol for a method, a class, and an object

Why don't we just let def return a little struct (or something similar) which contains both the UnboundMethod and the Symbol?

This would allow us to do even more things with it like (example from ruby-talk-posting by Dave Thomas)

  externally_typed(String) def get_name
    @first + " " + @last
  end

or the already mentioned

  private def x
    do internal stuff
  end

Of course private and friends would need to be slightly altered for this:

  alias :old_private :private
  def private(*args)
    if args and args[0] and args[0].is_a? MethodData
      old_private shift(args).symbol, *args
    else
      old_private *args
    end
  end

I'd argue that UnbondMethod should have an accessor that returns the name as a Symbol.

Well, I was going to post in agreement, but as I sit here thinking about it, I have to ask... does an UnboundMethod really have a name? Isn't it, by definition, unbound to any given name or thing? Or am I misunderstanding what an UnboundMethod really is?

BoundMethod?

[My name is Harald Gutsche from Germany]

just to throw some cents in...

I think, functions really should be objects (because everything should be)

so, this should be possible:

# anonymous function
f = def (x); puts x; end; f(77)

also this:

SomeClass.f = f; x = SomeClass.new; x.f(88)

also

x = SomeClass.new; x.f = f; x.f(88)

a bound method should carry it's (definition) name,

 def f; end # bound

differs from

 f = def; end # unboundf.name

should give the name

Functions are exactly like blocks but with different scope semantics, they don't have access to lexical variables around them, but blocks have.

So, one could have a function which turns a block into a function:

add = function begin |x,y|; x+y; end

which is equivalent to

add = def (x,y); x+y; end

so,

add = def |x,y|; x+y; end

should also be possible

I come to the conclusion that it should return a Method-object. And Method-Objects should have a to_sym method defined as something which produces an equivalent result as this one, but in a nicer way

class Method

  def to_sym
    self.to_s[/)#(.*)>$/, 1].intern
  end

end

i`m also think what _all_ language constructions should return something. not only def, but also class and module.

def should return new Method object.