iosdcrc_operator - Speaker Deck

iosdcrc_operator

by Shigure Shimotori

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iOSDC 2017 Reject Conference day1 ༣ศ԰͞Μͷԋࢉࢠ @S_Shimotori

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ͩΕ • @S_Shimotori / @S_Shimotori_pub • ͭΒֶ͍ੜ • iOSDCؔ܎3౓໨

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Custom Operators

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ԋࢉࢠΛࣗ࡞ʂͨͷ͍͠ʂ • xmartlabs/Eureka • ϑΥʔϜϏϧμʔ • +++ͰSectionΛ௥Ճ͢ΔͳͲ • thoughtbot/Runes • HaskellͰݟͨΑ͏ͳԋࢉࢠ͕࢖͑ΔΑ͏ʹͳΔ

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ͲΜͳԋࢉࢠ͕࡞ΕΔͷ͔ʁ

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͜ΕΛݟ͓͚ͯ͹׬ᘳͰ͢ʂ

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ͳΜͱͳʙ͘๏ଇ͕͋Δʂ

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๏ଇͦͷ1

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ͦͷ1: ࢖͑ͦ͏ͳASCIIจࣈ͸࢖͑Δ • ݟͨ͜ͱ͋Δ΋ͷͰ΄΅શͯ • ڍ͛ΒΕ͍ͯͳ͍จࣈΛݟΕ͹ೲಘ͔΋ʁ • ɹɹɹɹɹɹɹɹɹ΍ɹɹɹɹɹɹɹɹɹɹ΋ෆՄ • ɹ ͸dot operatorͰ࢖༻Մ l 4USJOH-JUFSBMͰ࢖༻ b LFZXPSEͷઌ಄Ͱ࢖༻ JGͳͲ JNQMJDJUOBNFEQBSBNFUFSTͰ࢖༻ ͳͲ \^ UVQMFɼGVODUJPOͳͲͰ࢖༻ <> BSSBZMJUFSBMͳͲͰ࢖༻ ܕͷݺͼग़͠ɼ࿈ଓ͢ΔPQFSBUPSͷ෼ׂͳͲͰ࢖༻ ۠੾Γͱͯ͠࢖༻ ! BUUSJCVUFͰ࢖༻ !BWBJMBCMFͳͲ a Τεέʔϓ΍,FZ1BUI&YQSFTTJPOͰ࢖༻ @ XJMEDBSEQBUUFSOͰ࢖༻ A ༧໿ޠΛJEFOUJpFSʹ༻͍Δ࣌ʹ࢖༻

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๏ଇͦͷ2

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ͦͷ2: identifierͰ࢖͑Δจࣈ͸جຊతʹ࢖͑ͳ͍ • identifierͱoperator͸ผ෺ • ઐ༻ͷΤϥʔ͕ଘࡏ͢Δ • • ΋ͪΖΜΞϧϑΝϕοτ΍਺ࣈ͸࢖༻ෆՄ • ΋࢖༻ෆՄ ·Ί͖ͪ͠: ͜ͷΤϥʔจ۟͸ʮidentifier_when_expecting_operatorʯͷ໊Ͱ͔ͬ͠ΓSwiftʹ࣮૷͞Ε͍ͯ·͢ https://github.com/apple/swift/blob/bf42def404abcc9239cf7856475da2c80b86cc70/include/swift/AST/DiagnosticsParse.def#L421

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❌ U+3008-U+3020, U+3030 ൣғμϒͬͯΔ͡ΌΜʁ U+3021-U+302Fɹ͕ ·Ί͖ͪ͠: U+3021-U+3029͸ોभ߸ᛰͱ͍͏਺ࣈɼU+302A-U+302F͸੠఺ͱ͔੠ූͱ͔ݺ͹ΕΔ΋ͷɽཁ͸தࠃޠɽ ͱ͍͏͔U+3000-U+303Fࣗମ͕CJK Symbols and Punctuationͱ͍͏ΧςΰϦɽ

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๏ଇͦͷ3

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ͦͷ3: ਺ֶه߸͕݁ߏ࢖͑Δ • ໼ҹͱ͔਺ֶه߸ͱ͔͕·Δͬͱ࢖͑Δ • mattt/Eulerͱ͍͏ϥΠϒϥϦ(?)͕͋Δ͘Β͍ • ɹɹɹɹ͸࢖͑ͳ͍ ΄͔ଟ਺ ਖ਼֬ʹ͍͏ͱɼUnicodeͰʮArrowsʯʮMathematical OperatorsʯʮMiscellaneous TechnicalʯϒϩοΫͱݺ͹Ε͍ͯΔͱ͜Ζ͕ ·Δ·Δ࢖༻Մೳʹͳ͍ͬͯΔ

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๏ଇͦͷ4

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ͦͷ4 : ҙ֎ͱׅހ΍ϓϥΠϜ͕࢖͑ͪΌ͏ • ASCIIจࣈͰμϝͰ΋ɼࣅͨจࣈ͕࢖͑Δ͜ͱ͕͋Δ • • • • ٯʹ͍͏ͱׅހ΍ΫΥʔτͷྨ͸ม਺໊ʹ࢖͑ͳ͍

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๏ଇͦͷ5

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ͦͷ5: ԋࢉࢠʹ࢖͑Δֆจࣈ΋͋Δ • ࢖͑Δͷ͸U+3030·ͰͷจࣈͷҰ෦ͱࢥͬͯOK • ͸U+1F436ɼ͸U+1F42E • ֆจࣈͷଟ͘͸U+1F000Ҏ߱Ͱൣғ֎ • U+3030Ҏલʹ͋Δֆจࣈ͸࢖͑Δ͔΋ʂ

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U+3030·ͰͷͲΕ͕ֆจࣈͳͷ͔ • The Unicode Consortium͕ܾΊ͍ͯΔ • ΄ͱΜͲ͕࢖͑ΔͷͰɼҰཡΛݟͯωλΛ࿅Δͱྑ͠ • ࢖͑ͳ͍ࢠ: • U+FE0FͱU+FE0E͕ԋࢉࢠ໊ͷ2จࣈ໨Ҏ߱Ͱ࢖͑Δ • ͭ·ΓֆจࣈελΠϧͱςΩετελΠϧ͸ผ෺ѻ͍ Ұཡ http://unicode.org/Public/emoji/5.0/emoji-data.txt https://ja.wikipedia.org/wiki/Unicode%E3%81%AEEmoji%E3%81%AE%E4%B8%80%E8%A6%A7

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͍͍ͩͨ͜Μͳײ͡ʂ

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·ͱΊ • ࢖͑ͦ͏ͳASCIIจࣈ͸࢖͑Δ • identiﬁerͰ࢖͑Δจࣈ͸جຊతʹ࢖͑ͳ͍ • ਺ֶه߸͕݁ߏ࢖͑Δ • ҙ֎ͱׅހ΍ϓϥΠϜ͕࢖͑Δ • ಉ͡छྨͷจࣈ͕શ෦࢖͑ΔΘ͚Ͱ͸ͳ͍ • ԋࢉࢠʹ࢖͑Δֆจࣈ΋͋Δ

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࠷ޙʹ΋͏1ͭ

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࣍ͷจࣈ͸ԋࢉࢠʹ࢖͑Δͷ͔ʁ ֆจࣈ͔Ͳ͏͔ ԋࢉࢠʹ࢖͑Δ͔ ὺ ˟ ℗ ™ ℠ ֆจࣈ͔Ͳ͏͔ ԋࢉࢠʹ࢖͑Δ͔ ὺ O : ˟ O : ⁴ O O : : : : ℗ O O ä : O ℠ O O