Context Receiversに思いを馳せる / Context Receivers

DroidKaigi2022 Dialogs - 2022/10/05 14:20-14:45
https://droidkaigi.jp/2022/timetable/363729

Transcript

1. Context Receiversʹ
   
   
   ࢥ͍Λ஘ͤΔ
   uzzu @ 2022/10/05 DroidKaigi 2022 DAY.01
   

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2. Cluster, Inc. All Rights Reserved. 2
   ஫ҙ
   2022/09࣌఺Ͱͷ
   
   
   ৘ใΛݩʹൃද͓ͯ͠Γ·͢
   
   
   ࢥ͍Λ஘ͤΔ಺༰ͳͷͰओ؍΋ؚ·Ε͓ͯΓ·͢
   
   
   Context Receivers͸ݱࡏprototypeஈ֊Ͱ͢
   
   
   ྃ͝ঝ͍ͩ͘͞
   

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3. Cluster, Inc. All Rights Reserved. 3
   ࣗݾ঺հ
   @uzzu
   
   
   
   
   Cluster, Inc.
   
   
   ιϑτ΢ΣΞΤϯδχΞ
   
   
   झຯ: VR, ࡶଟͳٕज़ݕূ, ಡॻ, DTM, ֨ήʔ, εϓϥ
   

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4. Cluster, Inc. All Rights Reserved. 4
   ClusterͷAndroidΞϓϦʹ͍ͭͯ
   AndroidΞϓϦ ࠾༻৘ใ
   AndroidΞϓϦΤϯδχΞืू
   ⬆ inroom (Unity as a Library)
   
   
   ⬅︎
   outroom (Native App)ɹɹɹ
   

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5. Cluster, Inc. All Rights Reserved. 5
   ΞδΣϯμ
   ɾContext Receivers͕དྷΔ·Ͱͷ͓͞Β͍
   
   
   ɾContext Receiversͱ͸ɺ࢖༻ྫ
   
   
   ɾContext Receiversͷ՝୊ɺࢥ͍
   
   
   ɾ·ͱΊ
   

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6. Cluster, Inc. All Rights Reserved. 6
   ContextReceivers͕དྷΔ·Ͱͷ͓͞Β͍
   KEEP(https://github.com/Kotlin/KEEP)
   
   
   YouTrack(https://youtrack.jetbrains.com/)
   
   
   Kotlin Slack(https://kotlinlang.slack.com/)
   
   
   ͍͔ͭ͋͘Δ͕ͦͷதͰ΋2ͭͷissueΛൈਮ
   

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7. Cluster, Inc. All Rights Reserved. 7
   Compile-time Extension Interfaces
   https://github.com/Kotlin/KEEP/pull/87
   
   
   2017/10ࠒ
   
   
   ɾ࠷ॳظ͸ʮType Classesʯͱ͍͏λΠτϧͰproposal͕ॻ͔Ε͍ͯͨ
   
   
   ɾʮ͍ͭʹKotlinʹ΋ܕΫϥε͕དྷΔ…?!ʯͱ͍͏ࣄͰք۾͸੝Γ্͕Δ
   

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8. Cluster, Inc. All Rights Reserved. 8
   Compile-time Extension Interfaces
   https://github.com/Kotlin/KEEP/pull/87
   

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9. Cluster, Inc. All Rights Reserved. 9
   Compile-time Extension Interfaces
   https://github.com/Kotlin/KEEP/pull/87
   ɾcompanion objectͱͷ໾ׂͷॏෳ
   
   
   ɾJVMͱͷ૬ޓӡ༻
   
   
   ɾෳ਺ͷϨγʔόʹର͢Δ֦ுߏจ͕ඞཁ
   
   
   ɾimplicit parameterͷ೉͠͞
   
   
   ɾetc…
   

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10. Cluster, Inc. All Rights Reserved. 10
    Multiple receivers on extension functions/properties
    https://youtrack.jetbrains.com/issue/KT-10468
    
    
    https://youtrack.jetbrains.com/issue/KT-42435
    

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11. Cluster, Inc. All Rights Reserved. 11
    ͦͯ͠Context Receivers΁
    https://github.com/Kotlin/KEEP/issues/259
    
    
    https://github.com/Kotlin/KEEP/blob/master/proposals/context-
    receivers.md
    
    
    ឯ༨ۂંʹ͍ͭͯ΋Proposalʹॻ͔Ε͍ͯΔ
    
    
    (Alternative approaches and design tradeoffs)
    
    
    1.6.20-M1 ʹͯPrototypeͱͯ͠ϦϦʔε
    
    
    https://blog.jetbrains.com/kotlin/2022/02/kotlin-1-6-20-m1-
    released/
    
    
    freeCompilerArgs = listOf("-Xcontext-receivers")
    

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12. Cluster, Inc. All Rights Reserved. 12
    Context ReceiversͷGoal (ͷ͏ͪ2͚ͭͩ঺հ)
    ɾίϯςΩετந৅ԽΛهड़͢ΔͨΊͷ
    
    
    ɹmember extension(ϝϯόʔ֦ு)ΛऔΓআ͘
    

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13. Cluster, Inc. All Rights Reserved. 13
    Context ReceiversͷGoal (ͷ͏ͪ2͚ͭͩ঺հ)
    

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14. Cluster, Inc. All Rights Reserved. 14
    Context ReceiversͷGoal (ͷ͏ͪ2͚ͭͩ঺հ)
    

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15. Cluster, Inc. All Rights Reserved. 15
    Context ReceiversͷGoal (ͷ͏ͪ2͚ͭͩ঺հ)
    

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16. Cluster, Inc. All Rights Reserved. 16
    Context ReceiversͷGoal (ͷ͏ͪ2͚ͭͩ঺հ)
    ɾKotlinͷܕγεςϜͰෳ਺ͷϨγʔόΛ࣋ͭ
    
    
    ɹίʔυϒϩοΫΛදݱͰ͖ΔΑ͏ʹ͢Δ
    

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17. Cluster, Inc. All Rights Reserved. 17
    Context Receiversͷͦͷଞͷྫ
    ɾίϯετϥΫλͷӅṭ + Contextࢀর
    

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18. Cluster, Inc. All Rights Reserved. 18
    Context Receiversͷͦͷଞͷྫ
    ɾOverloading(※஫ҙ఺͋Γ)
    ͜͏͍͏ίʔυ͸ॻ͔ͳ͍Ͱɺͳ಺༰΋Proposalʹهࡌ͞Ε͍ͯΔ
    
    
    (contexts-and-coding-style)
    

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19. Cluster, Inc. All Rights Reserved. 19
    ɾContext Functionͷείʔϓ֊૚ͷਂ͞(ݕ౼த)
    
    
    ɾReflectionະରԠ(Prototypeஈ֊Ͱ͸΍Βͳͦ͏ͳؾ͕)
    
    
    ɾΤοδέʔε΁ͷରԠ (Kotlin 1.8.0ͰҰ෦मਖ਼ࡁ)
    
    
    ɾSyntax Highlighting(Τϥʔ͸ు͘ͷͰے೑Ͱ)
    
    
    ɾetc…
    Context Receiversͷ՝୊(Future Work)
    

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20. Cluster, Inc. All Rights Reserved. 20
    (ϓϩτλΠϓஈ֊Ͱͱ΍͔͍͘͏΂͖
    
    
    Ͱ͸ͳ͍ͷ͸ঝ஌Ͱ)
    
    
    ɾهड़ͷબ୒ࢶ͕ଟͯ͋͘Μ·Γࠓ·ͰͷKotlinΒ͘͠ͳ͍Α͏ͳؾ͕͢Δͷ͕
    
    
    ɹݸਓతʹ͸ٯʹ໘ന͍
    
    
    ɾCompile-time extensionํ໘Ͱ্͕ͬͨ՝୊͔ΒݟΔʹՄೳͳهड़͸
    
    
    ɹ͜Ε͔ΒߜΒΕ͍ͯͬͯཉ͍͠ͳʔͱࢥ͍ͬͯΔ
    

    ɹ(ཞ༻͕ාͯ͘ਂ͘͸৮Εͳ͍ਓʑ͕͍ͦ͏ͳͷ͸΋͍ͬͨͳ͍ɺͱ͍͏ҙຯͰ)
    
    
    ɾݱঢ়Ͱ΋ᙱ͍ͱ͜Ζʹख͕ಧ͘ͷͰݸਓతʹ͸ॿ͔Δ
    Context Receivers΁ͷࢥ͍
    

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21. Cluster, Inc. All Rights Reserved. 21
    Context Receivers΁ͷࢥ͍
    ɾͦ΋ͦ΋ͳͥ ”Context” ʹͳͬͨͷ͔…ʁ
    
    
    ɹ=> Multiple receiversͷϓϩτλΠϓͷஈ֊Ͱ
    
    
    ɹɹύϥϝʔλΛஔ͖׵͑ΔͨΊʹ͋ΔΘ͚Ͱ͸ͳ͘
    
    
    ɹɹؔ਺ݺͼग़͠ͷͨΊͷίϯςΩετΛ௥Ճ͢Δҝͷ
    
    
    ɹɹઃܭ͕ඞཁͩͱؾ͍ͮͨҝ
    
    
    ɹɹ=> ύϥϝʔλͷ୅ΘΓʹ࢖༻͢Δ৔߹ʹ͸
    
    
    ɹɹɹهड़͕৑௕ʹͳΔΑ͏׶͍͑ͯͯ͠Δ
    
    
    ɹɹɹ=> ཞ༻͞Εͳ͍Α͏ʹ
    https://youtrack.jetbrains.com/issue/KT-10468/Multiple-receivers-on-extension-functionsproperties#focus=Comments-27-4608759.0-0
    

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22. Cluster, Inc. All Rights Reserved. 22
    Context Receivers΁ͷࢥ͍
    ɾͦ΋ͦ΋ͳͥ ”Context” ʹͳͬͨͷ͔…ʁ
    
    
    ɹ=> Multiple receiversͷϓϩτλΠϓͷஈ֊Ͱ
    
    
    ɹɹύϥϝʔλΛஔ͖׵͑ΔͨΊʹ͋ΔΘ͚Ͱ͸ͳ͘
    
    
    ɹɹؔ਺ݺͼग़͠ͷͨΊͷίϯςΩετΛ௥Ճ͢Δҝͷ
    
    
    ɹɹઃܭ͕ඞཁͩͱؾ͍ͮͨҝ
    
    
    ɹɹ=> ύϥϝʔλͷ୅ΘΓʹ࢖༻͢Δ৔߹ʹ͸
    
    
    ɹɹɹهड़͕৑௕ʹͳΔΑ͏׶͍͑ͯͯ͠Δ
    
    
    ɹɹɹ=> ཞ༻͞Εͳ͍Α͏ʹ
    https://youtrack.jetbrains.com/issue/KT-10468/Multiple-receivers-on-extension-functionsproperties#focus=Comments-27-4608759.0-0
    ͻΐͬͱͯ͠ਅ໘໨ʹimplicit parameterʹcode generationͳΓͰ
    
    
    ͪΌΜͱରԠͰ͖ΔΑ͏ʹɺ༨നͱͯ͠࢒͍ͯ͠ΔͷͩΖ͏͔…ʁ
    
    
    ؾʹͳΔ…ͦΘͦΘ…ৄ͍͠ਓڭ͍͑ͯͩ͘͞
    

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23. Cluster, Inc. All Rights Reserved. 23
    ·ͱΊ
    ɾContext Receivers͸ܕΫϥεͷProposal͔Β
    

    ɹෳ਺ͷϨγʔόʹର͢Δ֦ுߏจ͕ඞཁͱ͍͏
    

    ɹྲྀΕͰ࡞ΒΕͨ
    
    
    ɾKotlinʹͯ͠͸௝ࣗ͘͠༝౓ͷߴ͍Proposal
    
    
    ɾָ͍͠ͷ͸ࠓ͚͔ͩ΋…ʁ
    

    ɹProposalΛಡΜͰָ͘͠ɹ ʂ
    
    
    

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24. Context Receiversʹ
    
    
    ࢥ͍Λ஘ͤΔ
    uzzu @ 2022/10/05 DroidKaigi 2022 DAY.01
    

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