Why abstract class is evil? 〜Abstract classはなぜ邪悪か？〜

by Hiromi Hishida

Slide 1

Slide 1 text

8IZBCTUSBDUDMBTTJTFWJM ந৅Ϋϥε͸ͳͥअѱ͔ʁ 4ZNGPOZNFFUVQLBOTBJ

Slide 2

Slide 2 text

ɾ!XFC ɾϑϦʔϥϯεʢ೥͙Β͍ʣˠΧϧςοτίϛϡχέʔγϣϯζʢ೥ʣ ɾ໊ݹ԰ ɾࣇͷ฼ ɾ೔ຊ4ZNGPOZϢʔβʔձ ɾ$PEFS%PKP໊ݹ԰ॳ୅νϟϯϐΦϯʢॾࣄ৘͋ͬͯҾୀʜʣ ɾ*—1)1

Slide 3

Slide 3 text

ɾӡ༻ܕ޿ࠂۀքΛϗϫΠτʹ͢Δ࢓૊ΈΛ࡞ͬͯ·͢ ɾ஥ؒืूதʂʢϑϧϦϞʔτɺύʔτλΠϜɺ΋ͪΖΜϑϧ λΠϜਖ਼ࣾһ΋׻ܴʣ ɾ4ZNGPOZ࢖ͬͯ·͢ʂ

Slide 4

Slide 4 text

BCTUSBDUDMBTTͱ͸

Slide 5

Slide 5 text

BCTUSBDUDMBTTͱ͸ w ந৅Ϋϥε w SFGTந৅ͬͯԿʁCZ!IJEFOPSJHPUP w ܧঝ͞ΕΔલఏͷϕʔεΫϥε

Slide 6

Slide 6 text

͜ͷτʔΫͷ໨త w BCTUSBDUDMBTTͷअѱ͞Λ஌Δ w BCTUSBDUDMBTTͷ࢖͍ํΛ஌Δ

Slide 7

Slide 7 text

ࣄྫ

Slide 8

Slide 8 text

ཁ݅ᶃ Ϣʔβʔ؅ཧػೳΛ࡞ͬͯ Ͷɻ৽نొ࿥ͱ৘ใߋ৽͕ཁ ΔΑɻ ߲໨͸Ϣʔβʔ໊ɾύεϫʔ υɾϝʔϧΞυϨεͶɻ

Slide 9

Slide 9 text

࣮૷ᶃ 4ZNGPOZΛ࢖ͬͯ࡞ͬͨ Αʂ&OUJUZ࡞ͬͯ'PSN࡞ͬ ͯίϯτϩʔϥʔͰFN QFSTJTU ͢Δ΍ͭɻ͔Μͨ ΜͩͶʂ

Slide 10

Slide 10 text

ཁ݅ᶄ ύεϫʔυฏจอଘ͸͢͞ ͕ʹϠόΠΑɻ҉߸Խͯ͠ Ͷɻ҉߸Խํࣜ͸TIBͰ͍ ͍Αɻ

Slide 11

Slide 11 text

࣮૷ᶄ ΞΠΞΠαʔɻ ొ࿥ͱߋ৽྆ํͷΞΫγϣϯ ʹύεϫʔυ҉߸ԽΛॻ͍ͯ ׬੒ʂ

Slide 12

Slide 12 text

No content

Slide 13

Slide 13 text

͋ΕΕίϐϖͩͳʜ

Slide 14

Slide 14 text

ϦϑΝΫλᶃ Α͠ɺొ࿥ͱߋ৽ʹ͸ڞ௨ͷ ॲཧ͕͋Δ͔Β6TFS.BOBHFS ͱ͍͏ʮαʔϏεʯʹ·ͱΊͨ ͥʂ %%%ͩͥʂྲྀߦΓͷϨΠϠʔυ ΞʔΩςΫνϟͱ΋ݴ͏͔ͳʂ

Slide 15

Slide 15 text

No content

Slide 16

Slide 16 text

No content

Slide 17

Slide 17 text

ཁ݅ᶅ ෆਖ਼ϢʔβʔͷΞΧ΢ϯτౚ݁ Λ࡞Δ͜ͱʹͳͬͨΑɻ ౚ݁ػೳ͸ଞͷϝϯόʔ͕࣮૷ ͢Δ͔ΒɺΩϛ͸6TFSΤϯςΟ ςΟʹFOBCMFEϑϥάΛ଍͠ ͯɺ৽نొ࿥࣌ʹ0/ʹ͠ͱ͍ ͯʂ

Slide 18

Slide 18 text

࣮૷ᶅ ΦʔέʔΦʔέʔɻ ॲཧΛ6TFS.BOBHFSʹ·ͱΊ͓͍͔ͯͨΒɺίϯτ ϩʔϥʔ͸͍͡Βͣʹ6TFS.BOBHFS͚ͩม͑Ε͹͍ ͍͍͡ΌΜʂ%%%ͩͥʂ

Slide 19

Slide 19 text

No content

Slide 20

Slide 20 text

ཁ݅ᶆ ِ෺ϝʔϧΞυϨεͰͷ͍ͨͣ Βొ࿥͕ଟ͍͔Βɺϝʔϧೝূ ػೳΛ௥Ճͯ͠Ͷɻ ొ࿥͚࣌ͩ͡Όͳͯ͘ߋ৽ը໘ ͔ΒϝʔϧΞυϨε͕มߋ͞Ε ͨͱ͖ʹ΋ೝূΑΖ͘͠ɻ

Slide 21

Slide 21 text

࣮૷ᶆ Α͠Α͠ɺ·ͨ·ͨ6TFS.BOBHFS͚ͩมߋ ͢Ε͹͍͍Μͩͳʂ ϝʔϧೝূ͸ϝʔϧΞυϨεʹมߋ͕͋ͬͨ ৔߹͚͔ͩͩΒʜ6TFS.BOBHFSIBOEMF ͷ Ҿ਺ʹʮҎલͷϝʔϧΞυϨεʯ΋౉ͦ͏ɻ ৽نొ࿥ͷ৔߹͸OVMMΛ౉ͤ͹0,ɻ

Slide 22

Slide 22 text

No content

Slide 23

Slide 23 text

ϦϑΝΫλᶄ ͏ʔΜɻ6TFS.BOBHFSIBOEMF ͕ෳࡶʹ ͳ͖ͬͯͪΌͬͨͳʜɻ Ͱ΋ڞ௨ॲཧ͕͋Δ͔Βίϐϖίʔυʹ͢ Δͷ͸Ϡμͳɻ ͦ͏ͩʂ͜͏͍͏ͱ͖͸BCTUSBDUDMBTTʂ ΦϒδΣΫτࢦ޲ͬͯศརͩͳʙɻ

Slide 24

Slide 24 text

No content

Slide 25

Slide 25 text

ཁ݅ᶇ ϝʔϧΞυϨεೝূͳΜ͚ͩͲɺ৽نొ ࿥ͷͱ͖ͱϝʔϧΞυϨεมߋͷͱ͖Ͱจ ໘Ϗϛϣʔʹม͑ͯ΄͍͠ΜͩΑͶɻ ৽نొ࿥ʹ΋ʮ͍ͭ΋͝ར༻͋Γ͕ͱ͏ ͍͟͝·͢ʯͬͯͳΜ͔͓͔͍͠͡Ό Μɻมߋͷͱ͖͚ͩʹͯ͠Αɻ

Slide 26

Slide 26 text

࣮૷ᶇ ͏ʔΜɺมߋͷ৔߹͚͔ͩɻ "CTUSBDU6TFS.BOBHFSIBOEMF ͷϝʔϧೝ ূ૊Έཱͯ෦෼ʹ JG VTFSHFU*E \ NBJM1BSBNUSVF ^ ͘ɺ͍ۤ͠ʜɻ

Slide 27

Slide 27 text

ϦϑΝΫλᶅ ࢥ͍੾ͬͯ"CTUSBDU6TFS.BOBHFSΛ΍Ί ͨʂ ڞ௨෦෼͸1BTTXPSE&ODPEFSͱ $POpSNBUJPO.BJM4FOEFSͱͯ͠நग़͠Α ͏ʂ

Slide 28

Slide 28 text

No content

Slide 29

Slide 29 text

No content

Slide 30

Slide 30 text

ϦϑΝΫλᶅ

Slide 31

Slide 31 text

΋͠΋ʜ w ཁ݅ᶈ"ʜϢʔβʔ͝ͱͷϝʔϧΞυϨεมߋͷճ਺਺͑ ͓͍ͯͯɻ w ཁ݅ᶈ#ʜ৽نొ࿥࣌ʹ*1ΞυϨε΋อଘͰ͖Δʁ w ཁ݅ᶈ$ʜύεϫʔυมߋ࣌͸มߋ೔࣌΋อଘ͍ͨ͠ͳɻ

Slide 32

Slide 32 text

࠷ॳ͔ΒϦϑΝΫλᶅͷ࣮૷Λ࡞Δʹ͸ɺ Ͳͷ࣌఺͕λʔχϯάϙΠϯτ͔ͩͬͨʁ

Slide 33

Slide 33 text

࠷ॳ͔ΒϦϑΝΫλᶅͷ࣮૷Λ࡞Δʹ͸ɺ Ͳͷ࣌఺͕λʔχϯάϙΠϯτ͔ͩͬͨʁ w ͦ΋ͦ΋6TFS.BOBHFSʮϢʔβʔ؅ཧʯͷओޠ͕େ͖͗ͨ͢ ʢϦϑΝΫλᶃʣ w ࠷ॳʹόϦΤʔγϣϯ͕ൃੜͨ͠ͱ͖ʢཁ݅ᶅʣ w ʮૣ͗͢Δ࠷దԽʯͱݴΘΕΔ͔΋͠Ε·ͤΜ͕ݸਓతʹ͸ ίί΋ո͍͠ w ڞ௨෦෼Λ"CTUSBDU6TFS.BOBHFSʹ·ͱΊͪΌͬͨͱ͖ʢϦ ϑΝΫλᶄʣ w Α͏΍͘ຊ୊ ??

Slide 34

Slide 34 text

ڞ௨ॲཧ͕͋Δˠ"CTUSBDUDMBTTͰڞ௨Խ

Slide 35

Slide 35 text

ڞ௨ॲཧ͕͋Δˠ"CTUSBDUDMBTTͰڞ௨Խ ˞ͦ͏ࢥ͍ͬͯͨࠒ͕ࢲʹ΋͋Γ·ͨ͠ʜɻʙ೥લ͔ͳʜɻ

Slide 36

Slide 36 text

ڞ௨ॲཧ͕͋ΔˠผΫϥεʹग़͢

Slide 37

Slide 37 text

ڞ௨ॲཧ͕͋ΔˠผΫϥεʹग़͢

Slide 38

Slide 38 text

Ͱ͸ɺBCTUSBDUDMBTTͬͯԿ ͷͨΊʹଘࡏ͢Δͷʁ

Slide 39

Slide 39 text

No content

Slide 40

Slide 40 text

w BCTUSBDUDMBTT͸༻๏༻ྔΛकͬͯਖ਼͘͠࢖͍·͠ΐ͏ɻཚ ༻μϝθολΠɻ w தͰ৚݅෼ذ͢ΔBCTUSBDUDMBTTΛ࡞ͬͯ͠·͍͕ͪͳਓ ͸ɺʮڞ௨ॲཧ͕͋Δ͔ΒBCTUSBDUDMBTTΛ࡞Ζ͏ʂʯͱ ࢥͬͨͱ͖ɺཱͪࢭ·ͬͯϗϯτʹͦΕͰ͍͍͔ߟ͑Α͏ w ୯ʹʮڞ௨ॲཧ͕͋Δʯ͚ͩͳΒผΫϥεΛ࡞ͬͨΓ USBJUͷར༻Ͱे෼ͳ৔߹͕େ൒ w ਖ਼௚ɺ൚༻తͳϥΠϒϥϦͰͳ͘ΞϓϦΛ࡞͍ͬͯΔ։ൃऀ ʹBCTUSBDUDMBTT͕ඞཁͳέʔε͸͋·Γͳ͍ؾ͕͍ͯ͠Δ

Slide 41

Slide 41 text

5IBOLZPV