Method: Functional::FinalStruct#set

Defined in:
lib/functional/final_struct.rb

#set(field, value) ⇒ Object Also known as: []=

Set the value of the give field to the given value.

It is a logical error to attempt to set a final field more than once, as this violates the concept of finality. Calling the method a second or subsequent time for a given field will result in an exception being raised.

Parameters:

  • field (Symbol) —

    the field to set the value for

  • value (Object) —

    the value to set the field to

Returns:

  • (Object) —

    the final value of the given field

Raises:



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# File 'lib/functional/final_struct.rb', line 90

def set(field, value)
  synchronize do
    if ns_attribute_has_been_set?(field)
      raise FinalityError.new("final accessor '#{field}' has already been set")
    else
      ns_set_attribute(field, value)
    end
  end
end