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iosdcrc_operator
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Shigure Shimotori
October 13, 2017
Programming
1
600
iosdcrc_operator
Swiftは何故か郵便屋さんを採用している話です #iOSDCRC
Shigure Shimotori
October 13, 2017
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Transcript
iOSDC 2017 Reject Conference day1 ༣ศ͞Μͷԋࢉࢠ @S_Shimotori
ͩΕ • @S_Shimotori / @S_Shimotori_pub • ͭΒֶ͍ੜ • iOSDCؔ3
Custom Operators
ԋࢉࢠΛࣗ࡞ʂͨͷ͍͠ʂ • xmartlabs/Eureka • ϑΥʔϜϏϧμʔ • +++ͰSectionΛՃ͢ΔͳͲ • thoughtbot/Runes •
HaskellͰݟͨΑ͏ͳԋࢉࢠ͕͑ΔΑ͏ʹͳΔ
ͲΜͳԋࢉࢠ͕࡞ΕΔͷ͔ʁ
͜ΕΛݟ͓͚ͯᘳͰ͢ʂ
ͳΜͱͳʙ͘๏ଇ͕͋Δʂ
๏ଇͦͷ1
ͦͷ1: ͑ͦ͏ͳASCIIจࣈ͑Δ • ݟͨ͜ͱ͋ΔͷͰ΄΅શͯ • ڍ͛ΒΕ͍ͯͳ͍จࣈΛݟΕೲಘ͔ʁ • ɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹෆՄ • ɹ
dot operatorͰ༻Մ l 4USJOH-JUFSBMͰ༻ b LFZXPSEͷઌ಄Ͱ༻ JGͳͲ JNQMJDJUOBNFEQBSBNFUFSTͰ༻ ͳͲ \^ UVQMFɼGVODUJPOͳͲͰ༻ <> BSSBZMJUFSBMͳͲͰ༻ ܕͷݺͼग़͠ɼ࿈ଓ͢ΔPQFSBUPSͷׂͳͲͰ༻ ۠Γͱͯ͠༻ ! BUUSJCVUFͰ༻ !BWBJMBCMFͳͲ a Τεέʔϓ,FZ1BUI&YQSFTTJPOͰ༻ @ XJMEDBSEQBUUFSOͰ༻ A ༧ޠΛJEFOUJpFSʹ༻͍Δ࣌ʹ༻
๏ଇͦͷ2
ͦͷ2: identifierͰ͑Δจࣈجຊతʹ͑ͳ͍ • identifierͱoperatorผ • ઐ༻ͷΤϥʔ͕ଘࡏ͢Δ • • ͪΖΜΞϧϑΝϕοτࣈ༻ෆՄ •
༻ෆՄ ·Ί͖ͪ͠: ͜ͷΤϥʔจ۟ʮidentifier_when_expecting_operatorʯͷ໊Ͱ͔ͬ͠ΓSwiftʹ࣮͞Ε͍ͯ·͢ https://github.com/apple/swift/blob/bf42def404abcc9239cf7856475da2c80b86cc70/include/swift/AST/DiagnosticsParse.def#L421
❌ U+3008-U+3020, U+3030 ൣғμϒͬͯΔ͡ΌΜʁ U+3021-U+302Fɹ͕ ·Ί͖ͪ͠: U+3021-U+3029ોभ߸ᛰͱ͍͏ࣈɼU+302A-U+302Fͱ͔ූͱ͔ݺΕΔͷɽཁதࠃޠɽ ͱ͍͏͔U+3000-U+303Fࣗମ͕CJK Symbols and
Punctuationͱ͍͏ΧςΰϦɽ
๏ଇͦͷ3
ͦͷ3: ֶه߸͕݁ߏ͑Δ • ҹͱֶ͔ه߸ͱ͔͕·Δͬͱ͑Δ • mattt/Eulerͱ͍͏ϥΠϒϥϦ(?)͕͋Δ͘Β͍ • ɹɹɹɹ͑ͳ͍ ΄͔ଟ ਖ਼֬ʹ͍͏ͱɼUnicodeͰʮArrowsʯʮMathematical
OperatorsʯʮMiscellaneous TechnicalʯϒϩοΫͱݺΕ͍ͯΔͱ͜Ζ͕ ·Δ·Δ༻Մೳʹͳ͍ͬͯΔ
๏ଇͦͷ4
ͦͷ4 : ҙ֎ͱׅހϓϥΠϜ͕͑ͪΌ͏ • ASCIIจࣈͰμϝͰɼࣅͨจࣈ͕͑Δ͜ͱ͕͋Δ • • • • ٯʹ͍͏ͱׅހΫΥʔτͷྨม໊ʹ͑ͳ͍
๏ଇͦͷ5
ͦͷ5: ԋࢉࢠʹ͑Δֆจࣈ͋Δ • ͑ΔͷU+3030·ͰͷจࣈͷҰ෦ͱࢥͬͯOK • U+1F436ɼU+1F42E • ֆจࣈͷଟ͘U+1F000Ҏ߱Ͱൣғ֎ • U+3030Ҏલʹ͋Δֆจࣈ͑Δ͔ʂ
U+3030·ͰͷͲΕ͕ֆจࣈͳͷ͔ • The Unicode Consortium͕ܾΊ͍ͯΔ • ΄ͱΜͲ͕͑ΔͷͰɼҰཡΛݟͯωλΛ࿅Δͱྑ͠ • ͑ͳ͍ࢠ: •
U+FE0FͱU+FE0E͕ԋࢉࢠ໊ͷ2จࣈҎ߱Ͱ͑Δ • ͭ·ΓֆจࣈελΠϧͱςΩετελΠϧผѻ͍ 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
͍͍ͩͨ͜Μͳײ͡ʂ
·ͱΊ • ͑ͦ͏ͳASCIIจࣈ͑Δ • identifierͰ͑Δจࣈجຊతʹ͑ͳ͍ • ֶه߸͕݁ߏ͑Δ • ҙ֎ͱׅހϓϥΠϜ͕͑Δ •
ಉ͡छྨͷจࣈ͕શ෦͑ΔΘ͚Ͱͳ͍ • ԋࢉࢠʹ͑Δֆจࣈ͋Δ
࠷ޙʹ͏1ͭ
࣍ͷจࣈԋࢉࢠʹ͑Δͷ͔ʁ ֆจࣈ͔Ͳ͏͔ ԋࢉࢠʹ͑Δ͔ ὺ ˟ ℗ ™ ℠
ֆจࣈ͔Ͳ͏͔ ԋࢉࢠʹ͑Δ͔ ὺ O : ˟ O : ⁴ O O : : : : ℗ O O ä : O ℠ O O
Θ͔ΒΜʂʂʂ
None