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# frozen_string_literal: true
# rubocop:todo all
# Intermediate step between a Struct and an OpenStruct. Allows only designated
# field names to be read or written but allows passing fields to constructor
# as keyword arguments.
class KeywordStruct
def self.new(*field_names, &block)
Class.new.tap do |cls|
cls.class_exec do
define_method(:initialize) do |**fields|
fields.each do |field, value|
unless field_names.include?(field)
raise ArgumentError, "Unknown field #{field}"
end
instance_variable_set("@#{field}", value)
end
end
attr_accessor *field_names
end
if block_given?
cls.class_exec(&block)
end
end
end
end
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