Class: Cot::Enum

Inherits:
Object
  • Object
show all
Defined in:
lib/cot/enum.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Enum

Returns a new instance of Enum.



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# File 'lib/cot/enum.rb', line 4

def initialize
  @used = {}
  @num = 1
end

Instance Attribute Details

#num ⇒ Object

Returns the value of attribute num.



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# File 'lib/cot/enum.rb', line 3

def num
  @num
end

#used ⇒ Object

Returns the value of attribute used.



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# File 'lib/cot/enum.rb', line 3

def used
  @used
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/cot/enum.rb', line 23

def [](key)
  public_send key
end

#entry(name, options = {}) ⇒ Object 



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# File 'lib/cot/enum.rb', line 9

def entry(name, options = {})
  value = options[:value] || num
  if used.key? value
    fail "#{name} tried to set value #{value}, which is already used by #{used[value]}. Enum values are unique."
  end

  self.class.__send__ :define_method, name do
    value
  end

  @num = value + 1
  used[value] = name
end