"神クラス"問題の本質を「Subject-Object」二重モデルで理解する [v0.9]

OOC 2020 トーク資料
https://fortee.jp/object-oriented-conference-2020/proposal/fb1a1837-1a7d-4227-8f4c-f2d28aefaa3a

＊下はこのスライドに対する発表原稿です。
https://www.evernote.com/l/AE08g4ryWExEhJ7xKCK3p32W4-t_Q606XLI

Transcript

1. ਆΫϥε໰୊ͷຊ࣭Λ
   ʮ4VCKFDU0CKFDUʯ
   ೋॏϞσϧͰཧղ͢Δ
   ͨͳ͔͜͏͍ͪ
   !5BOBLB
   

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2. ࿦ࢫ֓ཁ
   

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3. ਆΫϥεݱ৅ͷཁҼ
   
   wਆΫϥεݱ৅
   ✦ཁҼ
   ʮ෼ׂ౷࣏๏ʯະద༻
   ‎ղܾ͸ൺֱత༰қ
   ʮ431 ୯Ұ੹೚ݪଇ
   ʯະద༻
   ‎ղܾ͸΍͔͍ͬ
   

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4. ਆΫϥεݱ৅ͷཁҼ
   
   wʮٕज़త࢈෺ʯͰͷਆΫϥεݱ৅ɿ
   ✤ʮϓϦϯλʔ੍ޚܥʯ ʮ)551$MJFOUʯ FUD
   ‎ʮ෼ׂ౷࣏๏ʯະద༻͕ओҼ
   wʮۀ຿աఔ্ͷࣄ෺ʯͰͷਆΫϥεݱ৅ɿ
   ✤ۀ຿ܥͰͷʮ঎඼ΤϯςΟςΟʯ FUD
   ‎ʮ431ʯະద༻͕ओҼ
   

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5. ʮૉ๿ͳ٬؍ଘࡏʯͳ0CKFDU
   0CKFDU
   ٬؍
   
   4VCKFDU
   ओ؍
   
   1SPKFDU
   ౤Ө
   
   $BTFT
   ࣄྫ
   
   5SVUI
   ਅ࣮
   
   ʹ
   4PNFUIJOH
   Կ͔
   
   1SPQFSUJFT
   0CTFSWF
   ؍࡯
   
   ˎ431ຬͨ͠΍͍͢ˎ
   

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6. ʮߏ੒ओٛతͳର৅ʯͳ0CKFDU
   'BDUT
   ࣄ࣮
   
   1SPWJTJPOBMMZ"HSFFE
   )ZQPUIFTJT
   ࢑ఆతʹ߹ҙ͞ΕͨԾઆ
   
   ʹ
   "OZUIJOH
   ԿΒ͔ͷ΋ͷ
   
   4PNFUIJOH
   Կ͔
   
   ˎ431ຬͨ͠ʹ͍͘ˎ
   *OKFDU
   ஫ೖ
   
   0CTFSWF
   ؍࡯
   
   "UUSJCVUFT
   0CKFDU
   ٬؍
   
   4VCKFDU
   ओ୊
   
   &YJTUFOUJBMJUZ
   

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7. ʮ431ʯͷຬͨ͠΍͢͞
   wʮૉ๿ͳ٬؍ଘࡏʯͱݟ၏ͤΔ0CKFDUɿ
   ✤0CKFDUࣗ਎Λ؍࡯ͯ͠ɺࣗવʹඋΘΔ1SPQFSUJFTΛಘΒ
   ΕΔ
   ‎ʮ431 ୯Ұ੹೚ݪଇ
   ʯຬͨ͠΍͍͢
   wʮߏ੒ओٛతͳର৅ʯͱݟΔ΂͖0CKFDUɿ
   ✤0CKFDUͷ"UUSJCVUFT͸ɺ4VCKFDU ओ୊
   ىݯͷ΋ͷ͕
   *OKFDU ஫ೖ
   ͞Εͨ΋ͷ
   ‎ຊ࣭తʹʮ431ʯΛຬͨ͠ʹ͍͘
   

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8. ݁࿦
   ʮ঎඼ΤϯςΟςΟʯͱ͍ͬͨʮۀ຿աఔ্ͷࣄ෺ʯ
   ͕ɺ
   ਆΫϥεݱ৅ΛҾ͖ى͕ͪ͜͠ͳͷ͸ɺ
   ͦΕ͕ɺʮߏ੒ओٛతͳର৅ʯͳ0CKFDUͰɺ
   ຊ࣭తʹ431Λຬͨ͠ʹ͍͘ੑ࣭Λ࣋ͭͨΊɻ
   

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9. ୈҰ෦ɹਆΫϥεͱ͸ʁ
   

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10. (PE$MBTT ਆΫϥε
    ͱ͸ʁ
    (PE$MBTTͱ͍͏ޠͷॳग़ɿ
    ɹɹ0CKFDU0SJFOUFE%FTJHO)FVSJTUJDT
    ɹɹ"SUIVS+3JFM
    

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11. (PE$MBTT ਆΫϥε
    ͱ͸ʁ
    ಉॻ੶Λࢀর͍ͯ͠Δӳޠ൛8JLJQFEJB
    ʹΑΔͱɺɺ
    ҙ༁
    
    ʮ෼ׂ౷࣏๏ʯ͕ద༻͞ΕΔ΂͖৔໘͕͋Δͱ͖ɺ
    ݩͷେ͖ͳ໰୊ͷ··ղܾΛਤΖ͏ͱ͢Δͱɺ͋Β
    ΏΔଐੑΛอ࣋͠ɺ͋ΒΏΔৼΔ෣͍Λ୲͏ڊେΫ
    ϥε͕ग़དྷ্͕Δɻ
    ͜ͷΑ͏ͳΫϥεΛʢͳΜͰ΋஌͍ͬͯΔͱ͍͏
    ঢ়گΛᎏ᎐ͯ͠ʣʮਆΫϥεʯͱ͍͏ɻ
    

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12. ʮϓϦϯλʔ੍ޚܥʯͷྫ
    ௨ৗ൛
    3'$1SJOUFS.*#
    IUUQTUPPMTJFUGPSHIUNMSGD
    

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13. ʮϓϦϯλʔ੍ޚܥʯͷྫ
    3'$1SJOUFS.*#
    IUUQTUPPMTJFUGPSHIUNMSGD
    ਆΫϥε൛
    

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14. ʮ঎඼ΤϯςΟςΟʯͷྫ
    ਆΫϥε൛
    ؔ৺ͷ෼཭Λҙ໊ࣝͨ͠લઃܭͰڊେΫϥεΛരࡴ͢Δ !.JOP%SJWFO
    IUUQTRJJUBDPN.JOP%SJWFOJUFNTCDEDB
    ඇਆΫϥε൛
    

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15. 431 ୯Ұ੹೚ݪଇ
    ͱ͸ʁ
    40-*%ݪଇͷதͷɺ͍Θ͹ୈҰݪଇ
    ʮϞδϡʔϧ͸ͨͬͨͻͱͭͷΞΫλʔʹରͯ͠
    ɹ੹຿Λෛ͏΂͖Ͱ͋Δʯ
    

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16. 431 ୯Ұ੹೚ݪଇ
    ͷղऍϒϨ
    ղऍͷϒϨ͕͋Δ
    

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17. 431 ୯Ұ੹೚ݪଇ
    ͷղऍϒϨ
    ʻޡղʼ
    ɹʮͲͷϞδϡʔϧ΋ͨͬͨͻͱͭͷ͜ͱ͚ͩΛߦ
    ɹ͏΂͖ʯ
    ɹɹ˞6ODMF#PCࢯɺʮ໊લ͕ྑ͘ͳ͔ͬͨʯ
    ʻຊདྷҙਤʼ
    ɹʮϞδϡʔϧ͸ͨͬͨͻͱͭͷΞΫλʔʹରͯ͠
    ɹ੹຿Λෛ͏΂͖Ͱ͋Δʯ
    

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18. 431 ୯Ұ੹೚ݪଇ
    ͷղऍϒϨ
    ʻޡղʼ
    ɹʮͲͷϞδϡʔϧ΋ͨͬͨͻͱͭͷ͜ͱ͚ͩΛߦ
    ɹ͏΂͖ʯ
    ɹɹˠ΄΅ʮ෼ׂ౷࣏๏ʯͷ࿩
    ʻຊདྷҙਤʼ
    ɹʮϞδϡʔϧ͸ͨͬͨͻͱͭͷΞΫλʔʹରͯ͠
    ɹ੹຿Λෛ͏΂͖Ͱ͋Δʯ
    

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19. ୈҰ෦ɹ·ͱΊ
    wਆΫϥεݱ৅
    ʮ෼ׂ౷࣏๏ʢޡղ͞Εͨ431ʣʯىҼ
    ‎։ൃ෺ࣗମͷϦϑΝΫλϦϯάˠൺֱత༰қ
    ʮ431ʢຊདྷҙਤʣʯىҼ
    ‎֎෦ͷཁٻൃੜݯͷ෼ੳ͕ඞཁˠ΍͔͍ͬ
    ‣ʮ঎඼ΤϯςΟςΟʯͷέʔε
    ‎431ʢຊདྷҙਤʣະద༻໰୊͕ى͖͍ͯΔ
    

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20. ୈೋ෦ɹͳͥ431ҧ൓͢Δͷ͔ʁ
    

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21. ʮૉ๿ͳ٬؍ଘࡏʯεΩʔϜ
    0CKFDU
    ٬؍
    
    4VCKFDU
    ओ؍
    
    1SPKFDU
    ౤Ө
    
    $BTFT
    ࣄྫ
    
    5SVUI
    ਅ࣮
    
    ʹ
    4PNFUIJOH
    Կ͔
    
    1SPQFSUJFT
    0CTFSWF
    ؍࡯
    
    ˎ431ຬͨ͠΍͍͢ˎ
    

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22. ʮߏ੒ओٛతͳର৅ʯεΩʔϜ
    'BDUT
    ࣄ࣮
    
    1SPWJTJPOBMMZ"HSFFE
    )ZQPUIFTJT
    ࢑ఆతʹ߹ҙ͞ΕͨԾઆ
    
    ʹ
    "OZUIJOH
    ԿΒ͔ͷ΋ͷ
    
    4PNFUIJOH
    Կ͔
    
    ˎ431ຬͨ͠ʹ͍͘ˎ
    *OKFDU
    ஫ೖ
    
    0CTFSWF
    ؍࡯
    
    "UUSJCVUFT
    0CKFDU
    ٬؍
    
    4VCKFDU
    ओ୊
    
    &YJTUFOUJBMJUZ
    

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23. ʮٕज़త࢈෺ʯ
    ✤ʮϓϦϯλʔ੍ޚܥʯ ʮ)551$MJFOUʯ FUD
    wʮٕज़త࢈෺ʯ͕వ͏৘ใɿ
    ಺ࡏ͢Δಛੑͱͯ͠ͷ1SPQFSUJFT
    ‎ʮૉ๿ͳ٬؍తଘࡏʯ
    

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24. ʮۀ຿աఔ্ͷࣄ෺ʯ
    ✤ʮ঎඼ΤϯςΟςΟʯͱ͍ͬͨ΋ͷ
    ✤ۀ຿աఔʹ͓͚Δػೳ໾ׂ͕౤Ө͞Εͨ΋ͷ
    wʮۀ຿աఔ্ͷࣄ෺ʯ͕వ͏৘ใɿ
    ۀ຿աఔͱͷؔ܎ੑ͔ΒݟఆΊΒΕͨ
    "UUSJCVUFT
    ‎ʮߏ੒ओٛతͳର৅ʯ
    ‎ࣗͣͱ431Λຬͨ͠ʹ͍͘ଘࡏ
    

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25. ୈೋ෦ɹ·ͱΊ
    wʮૉ๿ͳ٬؍తଘࡏʯεΩʔϜ
    wʮߏ੒ओٛతͳର৅ʯεΩʔϜ
    ‣ʮٕज़త࢈෺ʯ㱺ʮૉ๿ͳ٬؍తଘࡏʯ
    ‎431ຬͨ͠΍͍͢
    ‣ʮۀ຿աఔ্ͷࣄ෺ʯ㱺ʮߏ੒ओٛతͳର৅ʯ
    ‎ຊ࣭ͱͯ͠ɺ431Λຬͨ͠ʹ͍͘
    

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26. ͓͞Β͍ʢ૯·ͱΊʣ
    

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27. ਆΫϥεݱ৅ͷཁҼ
    ✦ʮ෼ׂ౷࣏๏ʢʹޡղ͞Εͨ431ʣʯະద༻
    ✦ʮ431ʢຊདྷҙਤʣʯະద༻
    ‎ղܾ͸໽հ
    

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28. 0CKFDUͷೋͭͷࡏΓ༷
    ʮૉ๿ͳ٬؍తଘࡏʯεΩʔϜ
    ✤0CKFDUࣗ਎ʹɺࣗવʹ಺ࡏ͢Δ1SPQFSUJFTͱ
    ͍͏ͷΛ؍࡯Ͱ͖Δ
    ʮߏ੒ओٛతͳର৅ʯεΩʔϜ
    ✤0CKFDUͷ࣋ͭ"UUSJCVUFT͸ɺ4VCKFDUىݯͷͦ
    ΕΛ*OKFDU͞Εͨ΋ͷͰɺ4VCKFDUͱɺ0CKFDU
    ͷ&YJTUFOUJBMJUZͱͷɺؔ܎ੑ͔Βఆ·Δ
    

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29. 431ͷຬͨ͠΍͢͞
    ʮૉ๿ͳ٬؍తଘࡏʯͱݟ၏ͤΔ0CKFDU
    ‎431Λຬͨ͠΍͍͢
    ʮߏ੒ओٛతͳର৅ʯͱݟΔ΂͖0CKFDU
    ‎ຊ࣭ͱͯ͠ɺ431Λຬͨ͠ʹ͍͘
    

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30. ʮٕज़త࢈෺ʯͱʮۀ຿աఔ্ͷࣄ෺ʯ
    ʮٕज़త࢈෺ʯ
    ‣Ұൠʹʮૉ๿ͳ٬؍తଘࡏʯͱݟ၏ͤΔ
    ‎ਆΫϥεݱ৅ 431ҧ൓ཁҼ
    ͕ى͖ʹ͍͘
    ʮۀ຿աఔ্ͷࣄ෺ʯ
    ‣ʮߏ੒ओٛతͳର৅ʯͱݟΔ΂͖
    ‎ਆΫϥεݱ৅ 431ҧ൓ཁҼ
    ͕ى͖΍͍͢
    

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31. ͋Γ͕ͱ͏͍͟͝·ͨ͠
    

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