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“kenkenize”で触れるRubyの中身 / Kenkenization and the Ruby Internal
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Kentaro Kuribayashi
October 31, 2019
1
380
“kenkenize”で触れるRubyの中身 / Kenkenization and the Ruby Internal
K-Ruby #24
https://k-ruby.connpass.com/event/151523/
Kentaro Kuribayashi
October 31, 2019
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Transcript
ʙϝλϓϩάϥϛϯάೖͱͯ͠ʙ ܀ྛ݈ଠ(.01FQBCP *OD ,3VCZ lLFOLFOJ[FzͰ৮ΕΔ3VCZͷத
(.0ϖύϘגࣜձࣾ ܀ྛ݈ଠBLB͋ΜͪΆͪΌΜ औక$50ɺࣛࣇౡΦϑΟενʔϜऀ IUUQTLFOUBSPLPSH
࣍ ࣄͷൃ LFOLFOHFNͷઆ໌ LFOLFOHFNͷ࣮ ͓ΘΓʹ
ࣄͷൃ
LFOLFOʹಥવ;ͬͯΘ͍ͨةػ ࣛࣇౡΦϑΟενʔϜʹLFOLFOͱ͍͏໊͋ͩͷΤϯδχΞ͕͍Δͷ͕ͩɺ ಥવͷվ໊ఏҊʹΑΔ໊͋ͩͷةػʂʂ̍
LFOLFOΛकΕʂʢʣ ·͋ɺͦ͏ͳΓ·͢ΑͶʜʜɻ
LFOLFOΛकΕʂʢʣ স͍ͷઈ͑ͳ͍ΞοτϗʔϜͳ৬Ͱ͢ɻ
LFOLFOΛकΕʂʢʣ ᰜͱݱΕΔΘͨ͘͠ͷఏҊɻ
lLFOLFOJ[Fzͷཁ݅ wཁ݅ ken ^ 2͕จࣈྻkenkenΛฦ͢ wͨͩ͠ɺม ken ʹจࣈྻken ͕ೖͬͯͯɺͦΕ͕ϝιου ^
ʹΑΓO ճ܁Γฦ͞ΕΔͱ͍͏࣮ͩͱͭ·Βͳ͍Ͱ͢ΑͶ wͦ͜Ͱɺมʹ͍͔ͳΔจࣈྻ͕ೖ͍ͬͯͯɺม໊Λnճ܁Γฦ͢͜ͱͰ ཁ݅Λຬͨ͢ίʔυʹ͍ͨ͠ɻ͜ͷॲཧΛlLFOLFOJ[FzͱݺͿɻ ͋ͳͨͳΒͲ͏͠·͔͢ʁߟ͑ͯΈ͍ͯͩ͘͞ɻ
LFOLFOHFNͷઆ໌
IUUQTHJUIVCDPNLFOUBSPLFOLFO
LFOLFOHFNͷ͍ํʢʣ
LFOLFOHFNͷ͍ํʢʣ จࣈྻ͕ͳΜͰ͋Δ͔ʹؔΘΒͣɺ ม໊͔Β܁Γฦ͢จࣈ͕ܾఆ͞ΕΔ
ཁ݅ͷ֬ೝ 㾎ཁ݅ ken ^ 2͕จࣈྻkenkenΛฦ͢ 㾎ͨͩ͠ɺม ken ʹจࣈྻken ͕ೖͬͯͯɺͦΕ͕ϝιου ^
ʹΑΓO ճ܁Γฦ͞ΕΔͱ͍͏࣮ͩͱͭ·Βͳ͍Ͱ͢ΑͶ 㾎ͦ͜Ͱɺมʹ͍͔ͳΔจࣈྻ͕ೖ͍ͬͯͯɺม໊Λnճ܁Γฦ͢͜ͱ Ͱཁ݅Λຬͨ͢ίʔυʹ͍ͨ͠ɻ͜ͷॲཧΛlLFOLFOJ[FzͱݺͿɻ ཁ݅ΛຬͨͤͨʂLFOLFOͷ໊͕͋ͩकΒΕͨʂʂ̍
LFOLFOHFNͷ࣮
LFOLFOHFN࣮ͷίΞʢൈਮʣ
eval͢Δ࣌ʹ3VCZͷ෦Ͱى͍ͬͯ͜Δ͜ͱʜᶃ 1BU4IBVHIOFTTZ 3VCZ6OEFSB.JDSPTDPQF"O*MMVTUSBUFE(VJEFUP3VCZ*OUFSOBMT /P4UBSDI1SFTT QQ
eval͢Δ࣌ʹ3VCZͷ෦Ͱى͍ͬͯ͜Δ͜ͱʜᶄ 1BU4IBVHIOFTTZ 3VCZ6OEFSB.JDSPTDPQF"O*MMVTUSBUFE(VJEFUP3VCZ*OUFSOBMT /P4UBSDI1SFTT QQ
LFOLFOHFN࣮ͷಓے wᶃͷྫ͔Β weval ͢Δͱɺ৽͍͠ελοΫϑϨʔϜ͕࡞͞ΕΔ wͦͷελοΫϑϨʔϜ͔ΒɺEPΛ௨ͯ͡ݩͷจ຺ͷมΛࢀরͰ͖Δ wᶄͷྫ͔Β wbindingΛ௨ͯ͡ɺݺͼग़͞ΕͨϝιουͷมΛࢀরͰ͖Δ wͭ·ΓɺbindingΛऔಘ͑͞Ͱ͖ΕɺͦͷٯͰ͖Δʹҧ͍ͳ͍ wϝιουݺͼग़͠ݩͷbindingΛ௨ͯࣗ͡ͷม໊ΛऔಘͰ͖Δͣʂ
LFOLFOHFN࣮ͷίΞͷղઆ ᶃݱࡏͷϑϨʔϜͷ;ͨͭ ্ͷbindingΛऔಘ ᶄᶃͷϑϨʔϜ্ͷϩʔΧ ϧมҰཡΛऔಘ ᶅᶄͰऔಘͨ͠ม໊Λᶃ ্ͰධՁ͠ɺΛಘΔ ᶆᶅͰಘͨͱࣗࣗ selfΛൺֱɻಉ͡ͳΒɺ ͦΕ͕తͷมͰ͋Δɻ
binding#of_callerϝιουɺCJOEJOH@PG@DBMMFSHFNʹΑͬͯՃ͞ΕͨϝιουͰɺίʔϧελοΫΛ͔͞ͷ΅ͬͯCJOEJOHΛऔಘͰ͖Δɻ
͓ΘΓʹ
·ͱΊͱิ wٕज़͕ͻͱΓͷਓؒͷ໊͋ͩΛकͬͨʂਖ਼͕࣮ٛߦ͞Εͨʂʂ̍ wݴޠͷ෦࣮ʹؔ͢ΔΠϝʔδ͕͋Δͱɺൃͷ෯͕͕Δʢ͔ʣ weval+bindingɺ͜͜Ͱղઆ͠ͳ͔ͬͨModule#class_eval BasicObject#instance_evalΛ͏ͱɺݱࡏͷίϯςΩετΛ͋Ε͜ ΕมߋͰ͖Δ w3VCZͰϝλϓϩάϥϛϯάΛ͍ͯ͠Δ߹ɺͦ͏͍͏ख๏Λ༻͍͍ͯΔ͜ͱ ͕ଟ͍ͷͰɺ͓ͬͯ͘ͱίʔυϦʔσΟϯάͷʹཱͭ ˞ࢀরͨ͠ॻ੶ץߦͷͨΊɺ࠷৽ͷ3VCZʹ͓͍ͯ෦࣮͕ҧ͍ͬͯΔ͔͠Ε·ͤΜɻͦͷลͷ֬ೝɺࠓޙͷ՝ͱ͍͏͜ͱͰɻ