Class: Class

Inherits:
Object
  • Object
show all
Defined in:
lib/ciridiri/extensions.rb

Overview

Extends the class object with class and instance accessors for class attributes, just like the native attr* accessors for instance attributes.

class Person
  cattr_accessor :hair_colors
end

Person.hair_colors = [:brown, :black, :blonde, :red]

Instance Method Summary collapse

Instance Method Details

#cattr_accessor(*syms) ⇒ Object 



44
45
46
47
 
# File 'lib/ciridiri/extensions.rb', line 44

def cattr_accessor(*syms)
  cattr_reader(*syms)
  cattr_writer(*syms)
end

#cattr_reader(*syms) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
# File 'lib/ciridiri/extensions.rb', line 11

def cattr_reader(*syms)
  syms.flatten.each do |sym|
    next if sym.is_a?(Hash)
    class_eval(<<-EOS, __FILE__, __LINE__)
      unless defined? @@#{sym}  # unless defined? @@hair_colors
        @@#{sym} = nil          #   @@hair_colors = nil
      end                       # end
                                #
      def self.#{sym}           # def self.hair_colors
        @@#{sym}                #   @@hair_colors
      end                       # end
                                #
      def self.#{sym}?          # def self.hair_colors?
        @@#{sym}                #   @@hair_colors
      end                       # end
    EOS
  end
end

#cattr_writer(*syms) ⇒ Object 



30
31
32
33
34
35
36
37
38
39
40
41
42
 
# File 'lib/ciridiri/extensions.rb', line 30

def cattr_writer(*syms)
  syms.flatten.each do |sym|
    class_eval(<<-EOS, __FILE__, __LINE__)
      unless defined? @@#{sym}                       # unless defined? @@hair_colors
        @@#{sym} = nil                               #   @@hair_colors = nil
      end                                            # end
                                                     #
      def self.#{sym}=(obj)                          # def self.hair_colors=(obj)
        @@#{sym} = obj                               #   @@hair_colors = obj
      end                                            # end
    EOS
  end
end