Peek in Calendar implementation of swift-foundation

Transcript

1. $ZCP[V.PCJMF.FFUVQ
   TXJGUGPVOEBUJPO
   $BMFOEBSͷ࣮૷Λ೷͘
   

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2. ΞδΣϯμ
   w TXJGUGPVOEBUJPOʹ͍ͭͯ
   w TXJGUGPVOEBUJPO TXJGUGPVOEBUJPOJDVͷؔ܎ਤ
   w TXJGUGPVOEBUJPOΛ೷͘
   • date(bySetting:value:for:)
   • date(byAdding:value:to:wrappingComponents:)
   

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3. w IPLVSPO
   w 5XJUUFS (JU)VC ;FOO FUDʜ
   w ೖࣾ
   w αΠϘ΢ζ0
   ffi
   DFJ04
   ࣗݾ঺հ
   

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4. TXJGUGPVOEBUJPO
   ֓ཁ
   w BQQMFTXJGUGPVOEBUJPOϦϙδτϦ
   w 'PVOEBUJPOͷΦʔϓϯιʔε൛
   w طଘͷ'PVOEBUJPOΑΓ΋଎͍
   w IUUQTHJUIVCDPNBQQMFTXJGUGPVOEBUJPO
   w IUUQTXXXTXJGUPSHCMPHGPVOEBUJPOQSFWJFXOPXBWBJMBCMF
   

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6. TXJGUGPVOEBUJPO
   TXJGUGPVOEBUJPOJDVύοέʔδ
   w TXJGUGPVOEBUJPO͕ґଘ͢Δ*$6࣮૷
   w ཪํతͳଘࡏ
   w BQQMFPTTEJTUSJCVUJPOT*$6ϦϙδτϦ͔Βࣗಈநग़
   w 4XJGU1.Λαϙʔτ
   w $ϥΠϒϥϦ
   w TXJGUGPVOEBUJPO͔Βར༻Ͱ͖ΔΑ͏ʹϒϦοδ༻$࣮૷΋༻ҙ ''*
   
   

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7. TXJGUGPVOEBUJPO
   w *OUFSOBUJPOBM$PNQPOFOUTGPS6OJDPEF
   w 6OJDPEFͱJOΛఏڙ͢ΔϥΠϒϥϦ
   w ࣌ؒʹؔ͢Δԋࢉ ྐྵͷऔΓѻ͍΍λΠϜκʔϯԋࢉ
   
   w ਺஋ɺ೔࣌ɺ௨՟ͳͲͷϑΥʔϚολʔ
   w ଞɺ6OJDPEFͷαϙʔτɺςΩετڥքɺਖ਼نදݱͳͲ
   *$6
   

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8. TXJGUGPVOEBUJPO
   w *$6͕࣋ͭػೳΛ૊Έ߹Θͤͯಠࣗͷ"1*Λఏڙ
   w *$6Ͱͷԋࢉ݁ՌͷՃ޻
   w *$6Ͱ͸࣮૷͞Ε͍ͯͳ͍೔෇ԋࢉͷ࣮૷
   w Calendar → _Calendar → ICU4C
   TXJGUGPVOEBUJPOJDVͱͷؔ܎ੑ Calendarͷ৔߹
   
   

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9. TXJGUGPVOEBUJPO
   w NSCalendarΫϥεͷ୯ͳΔϥούʔ
   w ΄ͱΜͲͷ৔߹ɺNSCalendarͷಉ໊ͷϝιουʹॲཧΛҠৡ͍ͯ͠Δ͚ͩ
   w $PSF'PVOEBUJPO΋όϯυϧ͞Ε͓ͯΓɺCFCalendarͰ*$6Λݺͼग़͢
   w TXJGUGPVOEBUJPO JDV
   ొ৔Ҏલ͔Βৄࡉͳ࣮૷ΛݟΔ͜ͱ͸Ͱ͖͍ͯͨ
   w TXJGUGPVOEBUJPOͱൺֱͯ͠Ͳͷఔ౓ͷৄࡉ͔͞͸ະ֬ೝ
   w Calendar → NSCalendar (CFCalendar) → ICU4C
   طଘͷTXJGUDPSFMJCTGPVOEBUJPO Calendarͷ৔߹
   
   

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10. struct Calendar
    class _Calendar
    class Calendar
    class GregorianCalendar
    class JapaneseCalendar
    ɾ
    ɾ
    ɾ
    class EraRules
    (ucal.cpp)
    TXJGUGPVOEBUJPO
    TXJGUGPVOEBUJPOJDV
    

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11. struct Calendar
    class _Calendar
    TXJGUGPVOEBUJPO
    

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12. TXJGUGPVOEBUJPO
    w ७ਮͳ4XJGUͷߏ଄ମ 7BMVFTFNBOUJDT
    
    w ΫϥΠΞϯτ͕௚઀ѻ͏͜ͱʹͳΔ෦෼
    w _Calendar͔Βͷ໭ͬͯ͘Δ݁ՌͷՃ޻
    w _Calendar΍*$6Ͱ͸࣮૷͞Ε͍ͯͳ͍೔෇ԋࢉͷ࣮૷
    public struct Calendar
    

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13. TXJGUGPVOEBUJPO
    w ओʹ*$6΁ͷϒϦοδ
    w VDBMDQQʹఆٛ͞Εͨؔ਺ ''*
    ͷݺͼग़͠
    w ݺͼग़͠தͷϩοΫ
    w *$6Ͱ͸࣮૷͞Ε͍ͯͳ͍೔෇ԋࢉͷ࣮૷
    internal class _Calendar
    

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14. struct Calendar
    class _Calendar
    TXJGUGPVOEBUJPO
    

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15. struct Calendar
    class _Calendar
    class Calendar
    class GregorianCalendar
    class JapaneseCalendar
    ɾ
    ɾ
    ɾ
    class EraRules
    (ucal.cpp)
    TXJGUGPVOEBUJPO
    TXJGUGPVOEBUJPOJDV
    

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16. class Calendar
    class GregorianCalendar
    class JapaneseCalendar
    ɾ
    ɾ
    ɾ
    class EraRules
    (ucal.cpp)
    TXJGUGPVOEBUJPOJDV
    

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17. TXJGUGPVOEBUJPOJDV
    w 4XJGU͔Β*$6 $࣮૷
    Λݺͼग़ͨ͢Ίͷ''* 'PSFJHO'VODUJPO*OUFSGBDF
    
    w 4XJGUͰ$Λ௚઀ݺ΂ΔΑ͏ʹͳͬͨͷͰ͸ʁ
    w *$6ͷCalendarΫϥεͷϙΠϯλΛఏڙ
    w ઌͷ_CalendarΫϥε͔Βؒ઀తʹ*$6ͷCalendarΫϥεʹΞΫηεՄೳʹ
    ucal.cpp
    

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18. TXJGUGPVOEBUJPOJDV
    w *$6
    w ྐྵಠࣗͷࣄ৘Λߟྀͨ͠೿ੜΫϥε
    w GregorianCalendar ϢϦ΢εྐྵάϨΰϦΦྐྵ
    
    w JapaneseCalendar ࿨ྐྵ
    
    w ਖ਼֬ʹ͸GregorianCalendarͷαϒΫϥε
    w FSBͱZFBSͷಈ͖͕ಛघͳͨΊɺ͞ΒʹEraRulesΫϥε͕༻ҙ͞Ε͍ͯΔ
    class Calendar
    

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19. class Calendar
    class GregorianCalendar
    class JapaneseCalendar
    ɾ
    ɾ
    ɾ
    class EraRules
    (ucal.cpp)
    TXJGUGPVOEBUJPOJDV
    

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20. struct Calendar
    class _Calendar
    class Calendar
    class GregorianCalendar
    class JapaneseCalendar
    ɾ
    ɾ
    ɾ
    class EraRules
    (ucal.cpp)
    TXJGUGPVOEBUJPO
    TXJGUGPVOEBUJPOJDV
    

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21. • date(bySetting:value:for:) -> Date?
    • date(byAdding:value:to:wrappingComponents:) -> Date?
    w υΩϡϝϯςʔγϣϯ͔Β͸ɺOJM͕ฦ͞ΕΔ৚͕͍݅·͍ͪΘ͔Βͳ͍
    w NSCalendarͰ͸ॻ͔Ε͍ͯΔ಺༰͕ඍົʹҧ͏
    w ͚Ͳ΍ͬͺΓΘ͔Βͳ͍
    w ͱΓ͋͑ͣɺvalueҾ਺ʹInt.maxΛ౉͕ͪ͠
    w ༗ޮൣғΛ୳ΔͷఘΊ͕ͪ
    TXJGUGPVOEBUJPOΛ೷͘
    

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22. දʹ·ͱΊ·ͨ͠
    

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23. ஫ҙשى
    IUUQTHJUIVCDPNBQQMFTXJGUGPVOEBUJPOUSFF
    CCBGEDFCBEFDEFD
    ͜ͷ࣌఺ ˢ
    ͷιʔείʔυΛࢀর͍ͯ͠·͢ɻ
    TXJGUGPVOEBUJPOͱTXJGUGPVOEBUJPOJDVͷίʔυ΍࣮ࡍʹಈ͔ͨ݁͠Ռ͔Βಡ
    Έऔͬͨ݁ՌͰ͢ɻਖ਼֬ʹಡΈऔΕͨอূ͸Ͱ͖͔Ͷ·͢ɻ
    ֬ೝͨ͠ྐྵ͸ɺάϨΰϦΦྐྵͱ࿨ྐྵͷΈͰ͢ɻͦͷଞͷྐྵͰ͸ɺҟͳΔ݁ՌʹͳΔ
    ͔΋͠Ε·ͤΜɻ
    04ʹόϯυϧ͞Ε͍ͯΔ'PVOEBUJPO͕ɺಉ༷ͷಈ͖Λ͢Δͷ͔͸͖ͪΜͱ֬ೝ͠
    ͍ͯ·ͤΜɻ
    

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24. date(bySetting:value:for:)
    componentx value ͷ༗ޮൣғ
    component era year
    value
    (Gregorian)
    d d
    value
    (Japanese)
    d
    ্ݶ͸೥߸͕
    มΘΔ͝ͱʹ૿Ճ
    dάϨΰϦΦྐྵͷ্ݶ͔Β
    dateͷ೥߸͕։࢝ͨ͠೥Λݮࢉ
    ྫ
    ݱࡏ
    ྩ࿨։࢝ͷ೥
    
    Լݶͷิ଍
    Լݶ͸ɺdateҾ਺ͷ஋ΑΓ΋ԼճΔ஋Λࢦఆ͢Δͱnil͕ฦΔ
    
    ྫ
    ݱࡏ
    ྐྵʹ.gregorianΛɺdateʹ.nowΛࢦఆɹɹɹɹྐྵʹ.japaneseΛɺdateʹ.nowΛࢦఆ
    FSB ੢ྐྵ
    ˠ⭕ɺ لݩલ
    ˠ❌ɹɹɹɹɹɹɹɹFSB ྩ࿨
    ˠ⭕ɺ ฏ੒
    ˠ❌
    ZFBSˠ⭕ɺҎԼˠ❌ɹɹɹɹɹɹɹɹZFBSˠ⭕ɺҎԼˠ❌
    

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25. date(bySetting:value:for:)
    componentx value ͷ༗ޮൣғ
    component month day hour
    minute,
    second
    weekday quarter weekOfMonth weekOfYear nanosecond
    value
    (ڞ௨)
    d d d d d
    d
    ͸ɺdateΛ
    ͦͷ··ฦ͢
    d d
    d
    
    

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26. date(bySetting:value:for:)
    componentx value ͷ༗ޮൣғ
    component calendar timeZone isLeapMonth
    value ৗʹnil͕ฦ͞ΕΔ ৗʹnil͕ฦ͞ΕΔ ৗʹnil͕ฦ͞ΕΔ
    

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27. date(bySetting:value:for:)
    componentx value ͷ༗ޮൣғ
    w weekdayOrdinalͱyearForWeekOfYear͸ௐ΂͖Εͳ͔ͬͨ
    w weekdayOrdinal ͸ɺ༗ޮൣғ಺ͱࢥΘΕΔ஋Ͱ΋Ϋϥογϡͨ͠Γॲཧ͕ࢭ·ͬͨΓ͢Δ
    

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28. w ϢϦ΢ε೔͔ΒTXJGUGPVOEBUJPO͕نఆ͢Δ࣌఺·Ͱ
    w طଘ࣮૷ͱͷޓ׵ੑͷͨΊʁ
    w d
    Date(timeIntervalSinceReferenceDate: -211845067200.0)…
    Date(timeIntervalSinceReferenceDate: 15927175497600.0)
    w date͕͜ͷൣғΛ௒͑Δͱnil͕ฦ͞ΕΔ
    w date(byAdding:value:to:wrappingComponents:)ͱ͸ҟͳΔ
    date
    date(bySetting:value:for:)
    

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29. date(byAdding:value:to:wrappingComponents:)
    componentx value ͷ༗ޮൣғ
    component
    era, year,
    month, day,
    hour, minute, second,
    weekday,
    weekdayOrdinal,
    quarter,
    weekOfMonth,
    weekOfYear,
    yearForWeekOfYear,
    nanosecond
    calendar timeZone isLeapMonth
    value IntͷൣғͰ
    ੍ݶͳ͠ ৗʹnil͕ฦ͞ΕΔৗʹnil͕ฦ͞ΕΔৗʹnil͕ฦ͞ΕΔ
    

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30. date(byAdding:value:to:wrappingComponents:)
    w ϢϦ΢ε೔͔ΒTXJGUGPVOEBUJPO͕نఆ͢Δ࣌఺·Ͱ
    w d
    Date(timeIntervalSinceReferenceDate: -211845067200.0)…
    Date(timeIntervalSinceReferenceDate: 15927175497600.0)
    w date͸ɺԋࢉલʹ͜ͷൣғʹऩ·ΔΑ͏ʹmax(min())͕औΒΕΔ
    w ԋࢉͷ݁Ռɺ͜ͷൣғ֎ʹͳͬͯ΋ͦͷ··ฦ͢
    w *$6ଆͰ͸΋ͬͱେ͖ͳൣғ لݩલສ೥
    ～
    ੢ྐྵສ೥
    ͕ѻ͑Δ
    ࠷ॳͷાஔΛߦ͏ͷ͸ɺTXJGUGPVOEBUJPOͷ੍໿ʁ
    date
    

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31. date(byAdding:value:to:wrappingComponents:)
    w ݁ՌʹӨڹ͠ͳ͍
    wrappingComponents
    

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32. • date(bySetting:value:for:) -> Date?
    • date(byAdding:value:to:wrappingComponents:) -> Date?
    w υΩϡϝϯςʔγϣϯ͔Β͸ɺOJM͕ฦ͞ΕΔ৚͕͍݅·͍ͪΘ͔Βͳ͍
    w NSCalendarͰ͸ॻ͔Ε͍ͯΔ಺༰͕ඍົʹҧ͏
    w ͚Ͳ΍ͬͺΓΘ͔Βͳ͍
    wͱΓ͋͑ͣɺvalueҾ਺ʹInt.maxΛ౉͕ͪ͠
    w ༗ޮൣғΛ୳ΔͷఘΊ͕ͪ
    TXJGUGPVOEBUJPOΛ೷͘
    

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33. value ʹ .max Λ౉͢ͱɺ
    date(byAdding:…)ͷ৔߹͸ɺdate ͷ஋͕ͦͷ··ฦ͞ΕΔ
    date(bySetting:…)ͷ৔߹͸ɺnil ͕ฦ͞ΕΔ
    

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