ActiveSupport::Concernで開くメタプログラミングの扉 #heiseirubykaigi / The door of meta-programing is opened by ActiveSupport::Concern

2019/12/14の平成Ruby会議01で発表したスライドです。

複数の誤りが発見されたので、2020/05/03に修正しました。詳しくはスライド内の変更履歴をご覧ください。

Transcript

1. "DUJWF4VQQPSU$PODFSO Ͱ։͘ ϝλϓϩάϥϛϯάͷ൶ 
   ฏ੒3VCZձٞ 4IV
   0("8"3" !FYQBKQ
2. มߋཤྺ  ❑  ❏ ฏ੒3VCZձٞ
   ॳ൛ެ։ ❑  ❏ JODMVEFͱFYUFOEΛऔΓҧ͍͑ͯͨՕॴ͕ ෳ਺͋ͬͨͷΛमਖ਼ ❏ ޡͬͨαϯϓϧίʔυΛमਖ਼
3. ࣗݾ঺հ ❑ 4IV
   0("8"3" !FYQBKQ ❏ ϦϯΧʔζגࣜձࣾ ❏ ग़਎ɿௗऔɺֶੜ࣌୅ɿਆށ ❏ झຯ͸ΫϥγοΫܥͷ߹এ ❏ ฏ੒2೥ੜ·Ε ❏ ઙాਅԝɺถ௡ݰࢣͱಉ͍೥ 
4.  ࠓ೔͸ਪ͠ͷ࿩Λ͠ʹ͖·ͨ͠
5. 
6. 
7.  "DUJWF4VQQPSU$PODFSO ʢ"4$ͱུ͠·͢ʣ
8. "DUJWF4VQQPSU$PODFSO ❑ 3BJMT͔Βಋೖ͞Εͨػೳ ❑ ؔ৺ࣄΛ.PEVMFʹ෼཭͠΍͘͢͢Δ ❑ ϝλϓϩάϥϛϯά3VCZͰݸผͷষ ͕ઃ͚ΒΕ͍ͯΔ ❏ ࣮૷ʹ͸ϝλϓϩάϥϛϯά͕;ΜͩΜʹ ༻͍ΒΕ͍ͯΔ
9. ͳͥਪ͍ͯ͠Δ͔ ❑ ͨͬͨߦͷγϯϓϧͳίʔυͰ ੈքதͷ໰୊Λղܾ͍ͯ͠Δ ඒ͍͠࢓૊Έ͔ͩΒ
10.  Ҿ༻ɿ03FJMMZ
    +BQBO
     ϝλϓϩάϥϛϯά3VCZ
    ୈ൛ IUUQTXXXPSFJMMZDPKQCPPLT
11. “  ຊॻ͸ϝλϓϩάϥϛϯάͷ ੒ޭ෺ޠ͕ຬࡌͰ͋Δɻ "DUJWF4VQQPSU$PODFSO΋ ͦ͏ͨ͠෺ޠͷͻͱͭͩɻ ϝλϓϩάϥϛϯά3VCZ
    ୈ൛ Q
12. ϝλϓϩάϥϛϯά ❑ ݴޠཁૉΛ࣮ߦ࣌ʹૢ࡞͢ΔίʔυΛ هड़͢Δ͜ͱ ❏ ϝιου ❏ είʔϓ ❏ ܧঝπϦʔ
13. "4$͸ϝλϓϩͷๅݿ ❑ ίʔυ͕ධՁ͞ΕΔείʔϓ͕ Ί·͙Δ͘͠มΘΔ ❑ 3VCZඪ४ಈ࡞͕ॻ͖׵͑ΒΕΔ
14. ͔͠͠ ϝλϓϩάϥϛϯάͱ͍͏ͱ
15. ϝλϓϩάϥϛϯά΁ͷҙݟ ❑ ॳ৺ऀ ❏ ೉ͦ͠͏ɺ͜Θ͍ ❑ தڃऀҎ্ ❏ ࢓ࣄͰॻ͍ͨΒౖΒΕΔ͔Βɺ ࢖͏ػձ͕ͳ͍
16. ΋͍ͬͨͳ͍
17. ϝλϓϩ࢖͍Λ૿΍͍ͨ͠ͷͰ ਪ͠Λ঺հ͠·͢
18. ࠓ೔ͷ໨త ❑ "DUJWF4VQQPSU$PODFSOͷ࣮૷ͷ ੌ͞Λ஌ͬͯ΋Β͏ ❑ ͦΕΛ௨ͯ͠ɺϝλϓϩάϥϛϯάΛ ֶͿͷʹ఍߅Λײ͍ͯ͡Δਓʹ ʮֶΜͰΈΑ͏ʯͱࢥͬͯ΋Β͏ ❏ ಡΉͱ͜Ζ͔Β࢝Ίͯ΋Β͏
19. Ͱ͸ɺ࢝Ί͍͖ͯ·͠ΐ͏
20. "DUJWF4VQQPSU$PODFSO ͬͯͲΜͳػೳʁ
21. ͦ΋ͦ΋Կʹࠔ͍͔ͬͯͨ ❑ ᶃݸͷϞδϡʔϧͰ͸ɺ Πϯελϯεϝιουɾ Ϋϥεϝιουͷยํ͔͠ఆٛͰ͖ͳ͍ ❏ ਖ਼֬ʹ͸ʮ͢ΔͱಡΈͮΒ͘ͳΔʯ ❑ ᶄϞδϡʔϧ͕ґଘ͍ͯ͠ΔϞδϡʔϧ ΋FYUFOE͠ͳͯ͘͸ͳΒͳ͍
22. Ϟδϡʔϧ͕ґଘ͢ΔϞδϡʔϧ module SecondLevelModule def second_method p 'second' end end module FirstLevelModule extend SecondLevelModule def first_method self.class.second_method p 'first' end end class BaseClass include FirstLevelModule end BaseClass.new.first_method # => NoMethodError JODMVEFͨ͠ϞδϡʔϧͷதͰ ͞ΒʹผͷϞδϡʔϧͰఆٛ͞Εͨ ΫϥεϝιουΛݺͼग़͢ͱ /P.FUIPE&SSPS
23. Ϟδϡʔϧ͕ґଘ͢ΔϞδϡʔϧ module SecondLevelModule def second_method p 'second’ end end module FirstLevelModule include SecondLevelModule def first_method self.class.second_method p 'first’ end end class BaseClass extend SecondLevelModule include FirstLevelModule end BaseClass.new.first_method # => “second” # “first” ͜ΕͳΒͪΌΜͱಈ͘
24. ΋ͱ΋ͱ Ͳ͏ղܾ͍͔ͯͨ͠
25. ᶃΫϥεϝιουΛಉ࣌ʹఆٛ module M def self.included(base) base.extend ClassMethods base.class_eval do scope :disabled, -> { where(disabled: true) } end end module ClassMethods ... end end JODMVEF͞Εͨͱ͖ʹൃՐ Ҿ༻ɿ"DUJWF4VQQPSU$PODFSO
    IUUQTBQJSVCZPOSBJMTPSHDMBTTFT"DUJWF4VQQPSU$PODFSOIUNM
26. ᶃΫϥεϝιουΛಉ࣌ʹఆٛ module M def self.included(base) base.extend ClassMethods base.class_eval do scope :disabled, -> { where(disabled: true) } end end module ClassMethods ... end end ΫϥεϚΫϩͱΫϥεϝιουΛ ແཧ΍ΓJODMVEF͞ΕͨઌͰ ఆٛ͢Δ
27. ᶄϞδϡʔϧ͕ґଘ͢ΔϞδϡʔϧ module SecondLevelModule ... end module FirstLevelModule extend SecondLevelModule def self.included(base) base.send :extend, SecondLevelModule end ... end class BaseClass include FirstLevelModule ... end BaseClass.new.first_method # => “second” # “first” ґଘϞδϡʔϧΛແཧ΍Γ FYUFOE͢Δ
28. "4$ͷػೳ ❑ ᶃϞδϡʔϧͰશ෦ੜ΍ͤΔ ❏ Πϯελϯεϝιουɾ ΫϥεϝιουɾΫϥεϚΫϩΛ ݸͷϞδϡʔϧͰੜ΍ͤΔ ❑ ᶄґଘϞδϡʔϧಡࠐෆཁ ❏ ϞδϡʔϧͷதͰFYUFOEͨ͠ ผϞδϡʔϧΛಡΈࠐ·ͳ͍Ͱྑ͘ͳΔ
29. ᶃ ϞδϡʔϧͰશ෦ੜ΍ͤΔ module M extend ActiveSupport::Concern included do scope :disabled, -> { where(disabled: true) } end class_methods do ... end end ΫϥεϚΫϩΛ *ODMVEFEͷϒϩοΫʹॻ͘
30. ᶃ ϞδϡʔϧͰશ෦ੜ΍ͤΔ module M extend ActiveSupport::Concern included do scope :disabled, -> { where(disabled: true) } end class_methods do ... end end ΫϥεϝιουΛ DMBTT@NFUIPETͷϒϩοΫʹॻ͘ $MBTT.FUIPETϞδϡʔϧ΋Մ
31. ᶄ ґଘϞδϡʔϧಡࠐෆཁ module SecondLevelModule extend ActiveSupport::Concern def second_method p 'second' end end module FirstLevelModule extend ActiveSupport::Concern extend SecondLevelModule def first_method self.class.second_method p 'first' end end class BaseClass include FirstLevelModule end BaseClass.new.first_method # => “second” # “first” ґଘϞδϡʔϧΛ FYUFOE͠ͳͯ͘΋ ͪΌΜͱಈ͘
32. Կ͕͏Ε͍͔͠ ❑ ᶃϞδϡʔϧͰશ෦ੜ΍ͤΔ ❏ Ϟδϡʔϧͷڽू౓্͕͕Δ ❏ ͜ͷಈ࡞Λॻͨ͘Ίͷ$POWFOUJPO͕ఆ·Δ ❑ ᶄґଘϞδϡʔϧಡࠐෆཁ ❏ Ϟδϡʔϧͷڽू౓্͕͕Δ ❏ %3:ʹͳΔ
33.  ΑΓΦϒδΣΫτࢦ޲ʹ஧࣮Ͱ ΑΓ3BJMTΒ͘͠ॻ͚Δ
34. "4$͸͜ΕΛͨͬͨߦͰ࣮ݱ # frozen_string_literal: true module ActiveSupport module Concern class MultipleIncludedBlocks < StandardError def initialize super "Cannot define multiple 'included' blocks for a Concern" end end def self.extended(base) base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self false else return false if base < self @_dependencies.each { |dep| base.include(dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end def included(base = nil, &block) if base.nil? if instance_variable_defined?(:@_included_block) if @_included_block.source_location != block.source_location raise MultipleIncludedBlocks end else @_included_block = block end else super end end def class_methods(&class_methods_module_definition) mod = const_defined?(:ClassMethods, false) ? const_get(:ClassMethods) : const_set(:ClassMethods, Module.new) mod.module_eval(&class_methods_module_definition) end end end
35. ͘͢͝ͳ͍͔͢ʁ
36. ͍͢͝ͱࢥͬͨਓ
37. "DUJWF4VQQPSU$PODFSO ͷ࣮૷ΛಡΈղ͘
38. ᶃϞδϡʔϧͰશ෦ੜ΍ͤΔ ͷίʔυ def included(base = nil, &block) if base.nil? if instance_variable_defined?(:@_included_block) if @_included_block.source_location != block.source_location raise MultipleIncludedBlocks end else @_included_block = block end else super end end def class_methods(&class_methods_module_definition) mod = const_defined?(:ClassMethods, false) ? const_get(:ClassMethods) : const_set(:ClassMethods, Module.new) mod.module_eval(&class_methods_module_definition) end
39. ᶃϞδϡʔϧͰશ෦ੜ΍ͤΔ ͷίʔυ ❑ DMBTT@NFUIPET
    ϝιου ❏ "4$Ͱಠࣗఆٛͷϝιου ❏ ΫϥεϝιουΛੜ΍͢ ❑ JODMVEFE
    ϝιου ❏ 3VCZ૊ࠐɿJODMVEF͞ΕΔͱൃՐ͢Δ ❏ ΫϥεϚΫϩΛੜ΍͢
40. DMBTT@NFUIPET ϝιου def class_methods(&class_methods_module_definition) mod = const_defined?(:ClassMethods, false) ? const_get(:ClassMethods) : const_set(:ClassMethods, Module.new) mod.module_eval(&class_methods_module_definition) end
41. DMBTT@NFUIPET ϝιου def class_methods(&class_methods_module_definition) mod = const_defined?(:ClassMethods, false) ? const_get(:ClassMethods) : const_set(:ClassMethods, Module.new) mod.module_eval(&class_methods_module_definition) end $MBTT.FUIPET͕͋Ε͹୅ೖ ͳ͚Ε͹ఆٛ
42. DMBTT@NFUIPET ϝιου def class_methods(&class_methods_module_definition) mod = const_defined?(:ClassMethods, false) ? const_get(:ClassMethods) : const_set(:ClassMethods, Module.new) mod.module_eval(&class_methods_module_definition) end DMBTT@NFUIPET͕ಋ͘ ϒϩοΫͷத਎Λ $MBTT.FUIPETͷείʔϓͰධՁ ʹ$MBTT.FUIPETʹϝιου͕ੜ͑Δ
43. JODMVEFE
    ϝιου def included(base = nil, &block) if base.nil? if instance_variable_defined?(:@_included_block) if @_included_block.source_location != block.source_location raise MultipleIncludedBlocks end else @_included_block = block end else super end end
44. JODMVEFE
    ͷຊདྷͷ࢖͍ํ module Foo def self.included(mod) p "#{mod} include #{self}" end end class Bar include Foo end # => "Bar include Foo" TFMGJODMVEFEͷܗͰɺ JODMVEF͞Εͨͱ͖ͷ ಈ࡞Λॻ͘ Ҿ༻ɿJOTUBODF
    NFUIPE
    .PEVMFJODMVEFE
    3VCZ
    
    IUUQTSVSFNBDMFBSDPEFDPNNFUIPE.PEVMFJJODMVEFEIUNM
45. JODMVEFE
    ϝιου def included(base = nil, &block) if base.nil? if instance_variable_defined?(:@_included_block) if @_included_block.source_location != block.source_location raise MultipleIncludedBlocks end else @_included_block = block end else super end end Ϩγʔό͕͋Δ ʹຊདྷͷ࢖͍ํΛ͍ͯ͠Δ
46. JODMVEFE
    ϝιου def included(base = nil, &block) if base.nil? if instance_variable_defined?(:@_included_block) if @_included_block.source_location != block.source_location raise MultipleIncludedBlocks end else @_included_block = block end else super end end Ϩγʔόͳ͠ͷJODMVEFE͕ ݸҎ্͋ͬͨΒΤϥʔ
47. JODMVEFE
    ϝιου def included(base = nil, &block) if base.nil? if instance_variable_defined?(:@_included_block) if @_included_block.source_location != block.source_location raise MultipleIncludedBlocks end else @_included_block = block end else super end end !@JODMVEFE@CMPDL ʹϒϩοΫΛ֨ೲ
48. ͜͜·Ͱͷ·ͱΊ ❑ ҎԼ͕ఆٛ͞Εͨ ❏ $MBTT.FUIPET ʹΫϥεϝιου ❏ !@JODMVEFE@CMPDL ʹΫϥεϚΫϩ ❑ ࣮ࡍʹੜ΍͢ಈ࡞͸ BQQFOE@GFBUVSFTͷΦʔόϥΠυ Ͱߦ͏
49. BQQFOE@GFBUVSFT ❑ Ϟδϡʔϧ͕JODMVEF͞Εͨͱ͖ʹ ݺ͹ΕΔϞδϡʔϧͷϝιου ❑ ΠϯελϯεϝιουΛੜ΍͢ಈ࡞ ❑ ͜ΕΛΦʔόʔϥΠυ͢Ε͹ɺ JODMVEF͞Εͨͱ͖ͷಈ࡞Λ ॻ͖׵͑ΒΕΔ
50. ΫϥεϝιουͱΫϥεϚΫϩΛ ੜ΍͢෦෼ def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self false else return false if base < self @_dependencies.each { |dep| base.include(dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end CBTFFYUFOEͰ $MBTT.FUIPETΛΫϥεϝιουͱͯ͠ੜ΍͠ CBTFDMBTT@FWBMͰ !@JODMVEFE@CMPDLΛΫϥεϚΫϩͱ࣮ͯ͠ߦͨ͠
51. ᶄґଘϞδϡʔϧಡࠐෆཁ ͷίʔυ def self.extended(base) base.instance_variable_set(:@_dependencies, []) end def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self false else return false if base < self @_dependencies.each { |dep| base.include(dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end
52. ᶄґଘϞδϡʔϧಡࠐෆཁ ͷίʔυ ❑ TFMGFYUFOEFE ϝιου ❏ 3VCZ૊ࠐɿFYUFOE͞ΕΔͱൃՐ͢Δ ❏ ʮ"4$ΛFYUFOEͨ͠ʯͱϚʔΩϯά ❑ BQQFOE@GFBUVSFT ϝιου ❏ 3VCZ૊ࠐɿJODMVEFͷ࣮ମ ❏ Ϟδϡʔϧͷಡࠐ࣌ʹґଘϞδϡʔϧ΋ ҰॹʹJODMVEF͢Δ
53. TFMGFYUFOEFE ϝιου ❑ ಡࠐݩʹ !@EFQFOEFODJFT
    ੜ΍͚ͩ͢ def self.extended(base) base.instance_variable_set(:@_dependencies, []) end
54. BQQFOE@GFBUVSFT ϝιου def append_features(base) if base.instance_variable_defined?(:@_dependencies) base.instance_variable_get(:@_dependencies) << self false else return false if base < self @_dependencies.each { |dep| base.include(dep) } super base.extend const_get(:ClassMethods) if const_defined?(:ClassMethods) base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) end end
55. Α͘Θ͔Βͳ͍ͷͰ ਤʹͯ͠Έͨ
56.  "4$
    ΛFYUFOE ;ͭ͏ͷΫϥε " # $ % NPEVMF NPEVMF NPEVMF DMBTT
57.  "4$
    ΛFYUFOE ;ͭ͏ͷΫϥε ᶃ $ΛJODMVEF ᶄ "ΛJODMVEF " # $ % NPEVMF NPEVMF NPEVMF DMBTT
58.  "4$
    ΛFYUFOE ;ͭ͏ͷΫϥε ᶃ $ΛJODMVEF ᶄ "ΛJODMVEF ᶅ $ͷ!@EFQʹ "Λ௥Ճ !@EFQ
    
    <"> " # $ % NPEVMF NPEVMF NPEVMF DMBTT
59.  "4$
    ΛFYUFOE ;ͭ͏ͷΫϥε ᶃ $ΛJODMVEF ᶄ "ΛJODMVEF ᶅ $ͷ!@EFQʹ "Λ௥Ճ !@EFQ
    
    <"> ᶆ #ΛJODMVEF " # $ % NPEVMF NPEVMF NPEVMF DMBTT
60.  "4$
    ΛFYUFOE ;ͭ͏ͷΫϥε !@EFQ
    
    <"> " # $ % NPEVMF NPEVMF NPEVMF DMBTT ͔͜͜Β͕ຊ൪
61.  "4$
    ΛFYUFOE ;ͭ͏ͷΫϥε !@EFQ
    
    <"> ᶇ !@EFQΛ%ʹJODMVEF " # $ % NPEVMF NPEVMF NPEVMF DMBTT
62.  "4$
    ΛFYUFOE ;ͭ͏ͷΫϥε !@EFQ
    
    <"> ᶇ !@EFQΛ%ʹJODMVEF ᶈ $Λ%ʹJODMVEF " # $ % NPEVMF NPEVMF NPEVMF DMBTT
63.  "4$
    ΛFYUFOE ;ͭ͏ͷΫϥε !@EFQ
    
    <"> ᶇ !@EFQΛ%ʹJODMVEF ᶈ $Λ%ʹJODMVEF ᶉ $ͷ$MBTT.FUIPET
    !@JODMVEFE@CMPDLΛ %ʹੜ΍͢ " # $ % NPEVMF NPEVMF NPEVMF DMBTT
64.  • "ͷΠϯελϯεϝιου͕ݺ΂Δ • "ఆٛͷΫϥεϝιου͕ݺ΂Δ • #͕ݺ΂Δ " # $ % NPEVMF NPEVMF NPEVMF DMBTT
65.  • $ఆٛͷΫϥεϝιου͕ݺ΂Δ • "ͷΠϯελϯεϝιου͕ ݺ΂Δ • "ఆٛͷΫϥεϝιου͕ݺ΂Δ • #ͷΠϯελϯεϝιου͸ ݺ΂ͳ͍ " # $ % NPEVMF NPEVMF NPEVMF DMBTT
66. ͜Ε͚ͩͷίʔυ͕ͨͬͨߦ ͍͢͝Ͱ͢ΑͶʁ
67. ֶΜͰΈΑ͏ͱࢥͬͨਓ ʢ·ͨ͸ֶΜͰ͍Δਓ ʣ
68. ϝλϓϩΛֶͿਓ͕૿͑Ε͹ ࠓ೔ͷൃද͸੒ޭͰ͢
69. ͱ͜ΖͰ
70. ͳͥϝλϓϩ࢖͍Λ૿΍͍͔ͨ͠ʁ
71. ͳͥϝλϓϩ࢖͍Λ૿΍͍͔ͨ͠ʁ ❑ 3VCZΛ࢖͏ϓϩάϥϛϯάॳ৺ऀ͕ ૿͍͑ͯΔ͔Β ❑ ϝλϓϩ͕Ͱ͖Δ͜ͱ͕ 3VCZΛ࢖͏ڧྗͳಈػʹͳΔ͔Β
72. 3VCZΛ࢖Θͳ͘ͳΔཧ༝ ❑ స৬ͨ͠Βผݴޠͩͬͨ ❑ ΄͍͠ϥΠϒϥϦ͕ͳ͔ͬͨ ❑ Θ͔Βͳ͍͜ͱ͕͋ͬͨͱ͖ɺ ฉ͚Δਓ͕͍ͳͯͦ͘ͷ··࠳ં
73.  ͲͷݴޠͰ΋Ͱ͖Δ͜ͱ͸ ݪཧతʹ͸มΘΒͳ͍Ҏ্ ͲΕΛ࢖͏͔͸޷Έͷ໰୊
74. Ͱ΋ɺॳ৺ऀʹ࢖͍ଓ͚ͯ΋Β͑ͳ͍ͱ ❑ ͭΑ͍3VCZΤϯδχΞͱͳΓ͏Δਓ͕ ผݴޠͷίϛϡχςΟʹ͍ͬͯ͠·͏ ❏ ϓϩάϥϛϯάεΫʔϧͷོ੝Λ νϟϯεʹม͑ΒΕͳ͍
75.  ίϛϡχςΟʹͱͬͯ ॏେͳଛࣦ
76. ࢖͍ଓ͚ͯ΋Β͏ʹ͸ʁ ❑ 3VCZͷίϯηϓτʹڞײͯ͠΋Β͏
77. “  3VCZ͸܅Λ৴པ͢Δɻ 3VCZ͸܅Λ෼ผͷ͋ΔϓϩάϥϚͱ͠ ͯѻ͏ɻ 3VCZ͸ϝλϓϩάϥϛϯάͷΑ͏ͳڧ ྗͳྗΛ༩͑Δɻ ϝλϓϩάϥϛϯά3VCZ
    ୈ൛ ংจ ·ͭ΋ͱΏ͖ͻΖ
78.  ·ͭ΋ͱ͞Μͷ৴པʹ Ԡ͑ΒΕΔΑ͏ʹͳΔ͜ͱ͕ 3VCZΛ࢖͍ଓ͚Δ ཧ༝ʹͳΔͷͰ͸
79.  ϝλϓϩͷֶशΛ࢝ΊΔͷ͸ ॳڃऀͷ࠷ޙͷน
80.  นͷதʹ൶Λݟग़ͤ͹ Ͱ͖Δ͜ͱ͕૿͑Δ ΋ͬͱͨͷ͍͠
81. “  ͦΕͰ͸ɺ 3VCZͰͨͷ͍͠ϓϩάϥϛϯάΛɻ ϝλϓϩάϥϛϯά3VCZ
    ୈ൛ ংจ ·ͭ΋ͱΏ͖ͻΖ
82. ϝλϓϩάϥϛϯάͷ ൶Λ։͍ͯ େ͍ͳΔྗΛखʹೖΕΑ͏ 'JO