From: Sean Hermany <sean.hermany@...>
Date: 2006-06-07T05:06:56+09:00
Subject: Re: Instance methods can't call protected class methods?

The problem is that self.call_me is not protected.

class Test

  protected
    def self.call_me
      puts "static and protected"
    end

  public
    def invoke_me
      puts "try to call"
      Test.call_me
      # this will _not_ work: self.call_me
      puts "done"
    end

end

t = Test.new

print "Output of p Test.protected_methods.sort:\n\n"

p Test.protected_methods.sort

print "\nOutput of p Test.public_methods.sort:\n\n"

p Test.public_methods.sort

print "\n"

t.invoke_me

OUTPUT:
-----------------

sean@jefferson:~$ ruby protected_test.rb
Output of p Test.protected_methods.sort:

[]

Output of p Test.public_methods.sort:

["<", "<=", "<=>", "==", "===", "=~", ">", ">=", "__id__", "__send__", 
"allocate", "ancestors", "autoload", "autoload?", "call_me", "class", 
"class_eval", "class_variables", "clone", "const_defined?", "const_get", 
"const_missing", "const_set", "constants", "display", "dup", "eql?", 
"equal?", "extend", "freeze", "frozen?", "hash", "id", "include?", 
"included_modules", "inspect", "instance_eval", "instance_method", 
"instance_methods", "instance_of?", "instance_variable_get", 
"instance_variable_set", "instance_variables", "is_a?", "kind_of?", 
"method", "method_defined?", "methods", "module_eval", "name", "new", 
"nil?", "object_id", "private_class_method", "private_instance_methods", 
"private_method_defined?", "private_methods", 
"protected_instance_methods", "protected_method_defined?", 
"protected_methods", "public_class_method", "public_instance_methods", 
"public_method_defined?", "public_methods", "respond_to?", "send", 
"singleton_methods", "superclass", "taint", "tainted?", "to_a", "to_s", 
"type", "untaint"]

try to call
static and protected
done

- Sean

Pete wrote:
> where's the problem?
> 
> class Test
> 
>   protected
>     def self.call_me
>       puts "static and protected"
>     end
> 
>   public
>     def invoke_me
>       puts "try to call"
>       Test.call_me
>       # this will _not_ work: self.call_me
>       puts "done"
>     end
> 
> end
> 
> t = Test.new
> t.invoke_me
> 
> 
>  > try to call
>  > static and protected
>  > done
> 
> 
> 
> Sean Hermany schrieb:


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