Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
構造的差分ライブラリ開発時の悲劇・喜劇
Search
Kuniwak
PRO
October 13, 2017
Programming
7
3k
構造的差分ライブラリ開発時の悲劇・喜劇
https://iosdc-reject-conference.connpass.com/event/64175/
Kuniwak
PRO
October 13, 2017
Tweet
Share
More Decks by Kuniwak
See All by Kuniwak
テストケースの名前はどうつけるべきか?
orgachem
PRO
1
510
欠陥を早期に発見するための Software Engineer in Test とその重要性 / What is Software Engineer in Test and How they works
orgachem
PRO
21
4.4k
住宅を WebXR で評価しよう / Evaluating My Home by WebXR
orgachem
PRO
0
160
HOME VR
orgachem
PRO
1
800
uGUI の自動操作の考え方と操作方法
orgachem
PRO
1
1.5k
Swift Macro に備えて構文木を 10min で学ぶ / Learn Syntax Tree for Swift Macro in 10 minutes
orgachem
PRO
1
1.4k
SoftWare Engineer in Test のおしごと / What is SWET
orgachem
PRO
1
1.1k
私と Nature Remo E / Nature Remo E
orgachem
PRO
0
27k
存在しないアセットへの参照と 未公開アセットでのネタバレに どう立ち向かうか / How to prevent missing assets and spoilers by assets
orgachem
PRO
1
1.2k
Other Decks in Programming
See All in Programming
ASP.NETアプリケーションのモダナイズ インフラ編
tomokusaba
1
420
GoのGenericsによるslice操作との付き合い方
syumai
3
690
技術同人誌をMCP Serverにしてみた
74th
1
390
型付きアクターモデルがもたらす分散シミュレーションの未来
piyo7
0
810
20250628_非エンジニアがバイブコーディングしてみた
ponponmikankan
0
470
PostgreSQLのRow Level SecurityをPHPのORMで扱う Eloquent vs Doctrine #phpcon #track2
77web
2
390
ReadMoreTextView
fornewid
1
480
Code as Context 〜 1にコードで 2にリンタ 34がなくて 5にルール? 〜
yodakeisuke
0
110
git worktree × Claude Code × MCP ~生成AI時代の並列開発フロー~
hisuzuya
1
490
たった 1 枚の PHP ファイルで実装する MCP サーバ / MCP Server with Vanilla PHP
okashoi
1
200
Cline指示通りに動かない? AI小説エージェントで学ぶ指示書の書き方と自動アップデートの仕組み
kamomeashizawa
1
580
PicoRuby on Rails
makicamel
2
110
Featured
See All Featured
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
5.9k
Become a Pro
speakerdeck
PRO
28
5.4k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
657
60k
The World Runs on Bad Software
bkeepers
PRO
69
11k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
130
19k
Practical Orchestrator
shlominoach
188
11k
Optimizing for Happiness
mojombo
379
70k
RailsConf 2023
tenderlove
30
1.1k
The Pragmatic Product Professional
lauravandoore
35
6.7k
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
3.9k
Writing Fast Ruby
sferik
628
61k
Designing for humans not robots
tammielis
253
25k
Transcript
ߏతࠩϥΠϒϥϦ ։ൃ࣌ͷ൵ܶتܶ σόοάΛॿ͚Δ
ߏతͳࠩͱԿ͔ ·ͣ
func testExample1() { let a = Example( key1: "I'm not
changed", key2: "I'm deleted" ) let b = Example( key1: "I'm not changed", key2: "I'm inserted" ) XCTAssertEqual(a, b) } Α͋͘ΔTUSVDUͷൺֱ
XCTAssertEqual failed: ("Example(key1: "I\'m not changed", key2: "I\'m deleted")") is
not equal to ("Example(key1: "I\'m not changed", key2: "I\'m inserted")") - ςετ݁ՌඇৗʹΘ͔ΓͮΒ͍
IUUQHJUIVCDPN,VOJXBL.JSSPS%J⒎,JU ͦ͜Ͱ
import MirrorDiffKit func testExample2() { let a = Example( key1:
"I'm not changed", key2: "I'm deleted" ) let b = Example( key1: "I'm not changed", key2: "I'm inserted" ) XCTAssertEqual(a, b, diff(between: a, and: b)) } ࣦഊ࣌ͷϝοηʔδʹ .JSSPS%J⒎,JUͷEJ⒎Λࢦఆ .JSSPS%J⒎,JUΛJNQPSU
struct Example { key1: "I'm not changed" - key2: "I'm
deleted" + key2: "I'm inserted" } ͜Ε͕ߏతͳࠩ ͙͢ʹࠩҟ͕Θ͔Γ·͢
[ "I'm not changed" "I'm not changed" - "I'm deleted"
"I'm not changed" + "I'm inserted" ] ྻͷॱংมߋͳͲ ߏతͳࠩͰ͢ ͜Εݟ͘͢දࣔ͞Ε·͢
IUUQHJUIVCDPN,VOJXBL.JSSPS%J⒎,JU ΑΖ͓͘͠ئ͍͠·͢
Έͷղઆ ࠩܭࢉͷ
let example = Example( key1: "I'm not changed", key2: "I'm
deleted" ) let hint = ( subject: Example.self, displayStyle: .struct, children: [ (label: "key1", value: "I'm not changed"), (label: "key2", value: "I'm deleted"), ] ) ߏతͳࠩͷܭࢉʹɺ ࣍ͷΑ͏ͳΦϒδΣΫτͷ ߏͷώϯτ͕ෆՄܽͰ͢ ΦϒδΣΫτͷܕ ΦϒδΣΫτͷछྨ ϓϩύςΟͷ໊લͱ
ͦͷػೳΛ୲͏ͷ͕.JSSPS ʢඪ४ϥΠϒϥϦͷ"1*Ͱ͢ʣ
let example = Example( key1: "I'm not changed", key2: "I'm
deleted" ) let mirror = Mirror(reflecting: example) let hint = ( subject: mirror.subjectType, displayStyle: mirror.displayStyle, children: mirror.children ) ௐ͍ͨΦϒδΣΫτ͔Β .JSSPSΦϒδΣΫτΛ ࡞͢Δͱɺ ܕใΦϒδΣΫτͷछྨɺ ϓϩύςΟͷ໊લͱͳͲΛ ೖखͰ͖·͢
.JSSPS%J⒎,JUɺ ͜ͷ.JSSPSΛͬͯ ࣮ݱ͞Ε͍ͯ·͢
͍ΖΜͳ͜ͱ͕Ͱ͖ͦ͏Ͱ ເͷ͕Δ"1*Ͱ͢Ͷ
تܶ͜͜·Ͱͩ
͍OJM͕͍ ൵ܶͦͷ
struct Example { let any: Any? } let example =
Example(any: nil) if let first = Mirror(reflecting: example) .children.first { print(first.value) } ϓϩύςΟΛOJMͰॳظԽ ϓϩύςΟͷΛݟΔͱɺ ઌ΄ͲOJMͰॳظԽͨ͠ͷͰ OJMʹͳ͍ͬͯΔ "OZ ͷϓϩύςΟ͕͋ΔTUSVDU .JSSPSΛ࡞ͯ͠ɺTUSVDUͷ ϓϩύςΟͷώϯτΛೖख
struct Example { let any: Any? } let example =
Example(any: nil) if let first = Mirror(reflecting: example) .children.first { print(first.value == nil) print(first.value) } GBMTF OJMͰ͔֬ΊͯΈΑ͏ ͔͠͠ೖ͍ͬͯΔͷOJMʜ
ߟฤ ൵͠Έͷ
"OZʹ ͳΜͰೖΔ ᶃ Int String Bool Any
0QUJPOBM ೖΕΒΕΔ ᶄ Optional<T> Any
͢ΔͱOJM ೖΓ͏Δ ᶄ nil Any
ᶄ nil Any == nil GBMTF
let x: Any? = nil let wrapper: Any = x
// WARNING: Comparing non-optional value of // type 'Any' to nil always returns false print(x == nil) ࣮ղઆͨ͠ྫΛίʔυʹ͢Δͱܯࠂ͕ग़Δ ʮ0QUJPOBM͡Όͳ͍ͱOJMΛ ɹൺֱͯ͠ৗʹGBMTFͩΑʯ
ͭ·Γɺ"OZʹOJMΛ ೖΕͯͳΒͳ͍ͷͰ͢
͔͠͠ɺ.JSSPSͰऔಘͨ͠ ϓϩύςΟͷͷܕ ແ༻Ͱ"OZͱ͍͏൵͠Έ ͳͷͰɺϓϩύςΟʹOJMΛͭ ΦϒδΣΫτΛ.JSSPSʹ͔͚Δͱ Ϋϥογϡͷةݥ͕͋Γ·͢
.JSSPS%J⒎,JUͰ͜ͷʹ ରॲ͍ͯ͠·͢ͷͰ҆͝৺Λʜ
ཁૉͷUVQMF ൵ܶͦͷ
enum Example { case zero case one(key: String) case two(key1:
String, key2: String) } 4XJGUͰFOVNͷDBTFʹଐ͢ΔΛఆٛͰ͖·͢ ͜ͷଐ͢ΔBTTPDJBUFEWBMVFTͱݺΕ͍ͯ·͢
enum Example { case one(key: String) case two(key1: String, key2:
String) } func test() { let x1: Example = .one(key: "value") let x2: Example = .two(key1: "value1", key2: "value2") let mirror1 = Mirror(reflecting: x1) let mirror2 = Mirror(reflecting: x2) dump(mirror1.children.first!.value) dump(mirror2.children.first!.value) } ͦΕͧΕΛ.JSSPSʹ͔͚·͢ ͜͜ͰBTTPDJBUFEWBMVFTͷ ཁૉ͕ҟͳΔͭͷDBTFΛ ఆٛ͠·͢ BTTPDJBUFWBMVFTɺ TUSVDUͷϓϩύςΟͱ ಉ͡Α͏ʹDIJMESFOͰ දݱ͞Ε·͢ ͦΕͧΕͷDIJMESFOΛ ֬ೝͯ͠Έ·͠ΐ͏
enum Example { case one(key: String) case two(key1: String, key2:
String) } func test() { let x1: Example = .one(key: "value") let x2: Example = .two(key1: "value1", key2: "value2") let mirror1 = Mirror(reflecting: x1) let mirror2 = Mirror(reflecting: x2) dump(mirror1.children.first!.value) dump(mirror2.children.first!.value) } BTTPDJBUFEWBMVFT͕ ͭͷ߹ WBMVF ͭͷ߹ LFZWBMVF LFZWBMVF ܕ͕ҧ͏
ߟฤ ൵͠Έͷ
let y: Any = (number: 123) print(type(of: y)) ܕΛௐͯΈΔͱ
*OU ຊBTTPDJBUFEWBMVFTͷཁૉ͕ ͍ͭ͘Ͱ͋ΕɺDIJMESFOͷܕUVQMFʹ ͔ͨͬͨ͠ͷͰͱਪଌ ͔͠͠ɺཁૉͷ͚࣌ͩࣄ͕͋ͬͯ UVQMFʹͰ͖ͳ͔͔ͬͨ͠Εͳ͍ͷͰɺ ࢼ͠ʹཁૉ͕ͭͷUVQMFΛ࡞ͯ͠ΈΔ UVQMFͰͳ͍
// Error: cannot create a single-element tuple with // an
element label let x: (number: Int) = (number: 123) let y: Any = (number: 123) print(type(of: y)) // Int ࣮ɺ4XJGUͷܕͰཁૉ͕ͭͷUVQMFఆٛͰ͖ͳ͍ ͔͠͠ɺཁૉͷUVQMFܕ͕ ࡞Εͳ͍͚ͩͳͷͰɺܕΛ "OZʹͯ͠͠·͑ཁૉͷ UVQMFΒ͖͠ͷΛఆٛͰ͖Δ ͔͠͠ɺఆٛͰ͖ͨͱͯ͠ɺ ͦͷܕཁૉͷதͷܕʹ ͳΔΑ͏ͩ ͭ·ΓɺཁૉͷUVQMF ଘࡏͰ͖ͳ͍͜ͱ͕Θ͔Δ
ཁૉͷUVQMFܕଘࡏͰ͖ͳ͍ͷͰɺ ຊདྷUVQMFͰ͋Δͣͷ BTTPDJBUFEWBMVFT͕ɺཁૉͷ ͱ͖ʹத͚ͩʹͳΔͷͰͨ͠ʜ
.JSSPS%J⒎,JUͰ͜ͷʹ ରॲ͍ͯ͠·͢ͷͰ҆͝৺Λʜ
ΧδϡΞϧʹյΕΔ ൵ܶͦͷ
·ͱΊ w .JSSPSͱ͍͏TUSVDUͳͲͷߏΛ ௐΔͨΊͷ"1*͕͋Γ·͢ w ৭ʑͰ͖ͦ͏Ͱເ͕͕Γ·͢ w ͔͠͠ɺ͔ͳΓͷͭΒΈ͕͋Γ·͢ͷͰ ͍ͬͯ͘ࡍʹ.JSSPS%J⒎,JUͷ ճආྫΛࢀߟʹ͢ΔͱΑ͍Ͱ͠ΐ͏