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\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// # frozen_string_literal: false # # = ostruct.rb: OpenStruct implementation # # Author:: Yukihiro Matsumoto # Documentation:: Gavin Sinclair # # OpenStruct allows the creation of data objects with arbitrary attributes. # See OpenStruct for an example. # # # An OpenStruct is a data structure, similar to a Hash, that allows the # definition of arbitrary attributes with their accompanying values. This is # accomplished by using Ruby's metaprogramming to define methods on the class # itself. # # == Examples: # # require 'ostruct' # # person = OpenStruct.new # person.name = "John Smith" # person.age = 70 # person.pension = 300 # # puts person.name # -> "John Smith" # puts person.age # -> 70 # puts person.address # -> nil # # An OpenStruct employs a Hash internally to store the methods and values and # can even be initialized with one: # # australia = OpenStruct.new(:country => "Australia", :population => 20_000_000) # p australia # -> # # Hash keys with spaces or characters that would normally not be able to use for # method calls (e.g. ()[]*) will not be immediately available on the # OpenStruct object as a method for retrieval or assignment, but can be still be # reached through the Object#send method. # # measurements = OpenStruct.new("length (in inches)" => 24) # measurements.send("length (in inches)") # -> 24 # # data_point = OpenStruct.new(:queued? => true) # data_point.queued? # -> true # data_point.send("queued?=",false) # data_point.queued? # -> false # # Removing the presence of a method requires the execution the delete_field # method as setting the property value to +nil+ will not remove the method. # # first_pet = OpenStruct.new(:name => 'Rowdy', :owner => 'John Smith') # first_pet.owner = nil # second_pet = OpenStruct.new(:name => 'Rowdy') # # first_pet == second_pet # -> false # # first_pet.delete_field(:owner) # first_pet == second_pet # -> true # # # == Implementation: # # An OpenStruct utilizes Ruby's method lookup structure to find and define the # necessary methods for properties. This is accomplished through the method # method_missing and define_method. # # This should be a consideration if there is a concern about the performance of # the objects that are created, as there is much more overhead in the setting # of these properties compared to using a Hash or a Struct. # class OpenStruct # :nodoc: class << self def allocate (x = super).instance_variable_set(:@table, {}) x end end # # Creates a new OpenStruct object. By default, the resulting OpenStruct # object will have no attributes. # # The optional +hash+, if given, will generate attributes and values # (can be a Hash, an OpenStruct or a Struct). # For example: # # require 'ostruct' # hash = { "country" => "Australia", :population => 20_000_000 } # data = OpenStruct.new(hash) # # p data # -> # def initialize(hash=nil) @table = {} if hash hash.each_pair do |k, v| k = k.to_sym @table[k] = v end end end # Duplicate an OpenStruct object members. def initialize_copy(orig) super @table = @table.dup end # # Converts the OpenStruct to a hash with keys representing # each attribute (as symbols) and their corresponding values # Example: # # require 'ostruct' # data = OpenStruct.new("country" => "Australia", :population => 20_000_000) # data.to_h # => {:country => "Australia", :population => 20000000 } # def to_h @table.dup end # # Yields all attributes (as a symbol) along with the corresponding values # or returns an enumerator if not block is given. # Example: # # require 'ostruct' # data = OpenStruct.new("country" => "Australia", :population => 20_000_000) # data.each_pair.to_a # => [[:country, "Australia"], [:population, 20000000]] # def each_pair return to_enum(__method__) { @table.size } unless block_given? @table.each_pair{|p| yield p} self end # # Provides marshalling support for use by the Marshal library. # def marshal_dump @table end # # Provides marshalling support for use by the Marshal library. # def marshal_load(x) @table = x end # # Used internally to check if the OpenStruct is able to be # modified before granting access to the internal Hash table to be modified. # def modifiable begin @modifiable = true rescue raise RuntimeError, "can't modify frozen #{self.class}", caller(3) end @table end protected :modifiable # # Used internally to defined properties on the # OpenStruct. It does this by using the metaprogramming function # define_singleton_method for both the getter method and the setter method. # def new_ostruct_member(name) name = name.to_sym unless singleton_class.method_defined?(name) define_singleton_method(name) { @table[name] } define_singleton_method("#{name}=") { |x| modifiable[name] = x } end name end protected :new_ostruct_member def freeze @table.each_key {|key| new_ostruct_member(key)} super end def respond_to_missing?(mid, include_private = false) mname = mid.to_s.chomp("=").to_sym @table.key?(mname) || super end def method_missing(mid, *args) # :nodoc: len = args.length if mname = mid[/.*(?==\z)/m] if len != 1 raise ArgumentError, "wrong number of arguments (#{len} for 1)", caller(1) end modifiable[new_ostruct_member(mname)] = args[0] elsif len == 0 if @table.key?(mid) new_ostruct_member(mid) @table[mid] end else err = NoMethodError.new "undefined method `#{mid}' for #{self}", mid, args err.set_backtrace caller(1) raise err end end # Returns the value of a member. # # person = OpenStruct.new('name' => 'John Smith', 'age' => 70) # person[:age] # => 70, same as ostruct.age # def [](name) @table[name.to_sym] end # # Sets the value of a member. # # person = OpenStruct.new('name' => 'John Smith', 'age' => 70) # person[:age] = 42 # => equivalent to ostruct.age = 42 # person.age # => 42 # def []=(name, value) modifiable[new_ostruct_member(name)] = value end # # Retrieves the value object corresponding to the each +name+ # objects repeatedly. # # address = OpenStruct.new('city' => "Anytown NC", 'zip' => 12345) # person = OpenStruct.new('name' => 'John Smith', 'address' => address) # person.dig(:address, 'zip') # => 12345 # person.dig(:business_address, 'zip') # => nil # def dig(name, *names) begin name = name.to_sym rescue NoMethodError raise TypeError, "#{name} is not a symbol nor a string" end @table.dig(name, *names) end # # Remove the named field from the object. Returns the value that the field # conta