Module: OptStruct::ClassMethods

Defined in:
lib/opt_struct/class_methods.rb

Instance Method Summary collapse

Instance Method Details

#defaults ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 55

def defaults
  @defaults ||= {}
end

#expect_arguments(*arguments) ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 59

def expect_arguments(*arguments)
  check_reserved_words(arguments)

  existing = expected_arguments.count
  expected_arguments.concat(arguments)

  arguments.each_with_index do |arg, i|
    n = i + existing
    define_method(arg) { @arguments[n] }
    define_method("#{arg}=") { |value| @arguments[n] = value }
  end

end

#expected_arguments ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 73

def expected_arguments
  @expected_arguments ||= []
end

#inherited(subclass) ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 3

def inherited(subclass)
  instance_variables.each do |v|
    ivar = instance_variable_get(v)
    subclass.send(:instance_variable_set, v, ivar.dup) if ivar
  end
end

#option(key, default = nil, **options) ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 40

def option(key, default = nil, **options)
  default = options[:default] if options.key?(:default)
  defaults[key] = default
  required_keys << key if options[:required]
  option_accessor key
end

#option_accessor(*keys) ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 35

def option_accessor(*keys)
  option_reader *keys
  option_writer *keys
end

#option_reader(*keys) ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 19

def option_reader(*keys)
  check_reserved_words(keys)

  keys.each do |key|
    define_method(key) { options[key] }
  end
end

#option_writer(*keys) ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 27

def option_writer(*keys)
  check_reserved_words(keys)

  keys.each do |key|
    define_method("#{key}=") { |value| options[key] = value }
  end
end

#options(*keys, **keys_defaults) ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 47

def options(*keys, **keys_defaults)
  option_accessor *keys if keys.any?
  if keys_defaults.any?
    defaults.merge!(keys_defaults)
    option_accessor *(keys_defaults.keys - expected_arguments)
  end
end

#required(*keys) ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 14

def required(*keys)
  required_keys.concat keys
  option_accessor *keys
end

#required_keys ⇒ Object 



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# File 'lib/opt_struct/class_methods.rb', line 10

def required_keys
  @required_keys ||= []
end