Feature #10571: Keyword arguments with local variable

• Status: Closed
• Assignee: -
• Target version: -

[gogotanaka (Kazuki Tanaka)]

It's kind of curiosity. As far as I searched, I couldn't get sensible reason.
Please give me information if you have free time.

class MyClass
  var = 'test'
  def my_method(kwd_var: var)
    p kwd_var
  end
end

MyClass.new.my_method
#=> NameError: undefined local variable or method `var' for #<MyClass:0x007f91520a15c8>

I've expected above code is same as below code.

class MyClass
  def my_method(kwd_var: 'test')
    p kwd_var
  end
end

MyClass.new.my_method
#=> "test"

Take your time. Thanks.

[gogotanaka (Kazuki Tanaka)]

Ops.. not only Keyword arguments also other arguments with default value has same behavior.

I suppose there must be sensible reason for that, I need to look for more.. sorry for noisey then.

[matz (Yukihiro Matsumoto)]

var is a local variable in the class scope, which cannot be accessed from the method. a method has independent scope.

Matz.

[matz (Yukihiro Matsumoto)]

• Status changed from Open to Closed

[nobu (Nobuyoshi Nakada)]

You can define a method shares the scope with the outside by define_method.

[gogotanaka (Kazuki Tanaka)]

@Yukihiro Matsumoto san
Thank you so much. It does make sense, I need to more deepen understanding your language.

@Nobuyoshi Nakada san
Thank you for your information. I think define_method, moreover block is really really awesome.

Sorry for the noise.