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
Apollo_Code_Generation [en]
Search
YuyaHorita
October 09, 2019
Programming
0
250
Apollo_Code_Generation [en]
YuyaHorita
October 09, 2019
Tweet
Share
More Decks by YuyaHorita
See All by YuyaHorita
mahjong-kun.pdf
horitayuya
0
94
Apollo_Code_Generation [jp]
horitayuya
0
2.4k
Difference Algorithm
horitayuya
11
5.8k
iOS11でのHEVC動画のHLS配信
horitayuya
2
1.7k
Other Decks in Programming
See All in Programming
ニーリーにおけるプロダクトエンジニア
nealle
0
950
チームのテスト力を総合的に鍛えて品質、スピード、レジリエンスを共立させる/Testing approach that improves quality, speed, and resilience
goyoki
5
1.2k
Vibe Codingの幻想を超えて-生成AIを現場で使えるようにするまでの泥臭い話.ai
fumiyakume
15
6.7k
型で語るカタ
irof
0
710
#QiitaBash MCPのセキュリティ
ryosukedtomita
1
1.5k
猫と暮らす Google Nest Cam生活🐈 / WebRTC with Google Nest Cam
yutailang0119
0
170
状態遷移図を書こう / Sequence Chart vs State Diagram
orgachem
PRO
2
210
SwiftでMCPサーバーを作ろう!
giginet
PRO
2
110
チームで開発し事業を加速するための"良い"設計の考え方 @ サポーターズCoLab 2025-07-08
agatan
1
470
『自分のデータだけ見せたい!』を叶える──Laravel × Casbin で複雑権限をスッキリ解きほぐす 25 分
akitotsukahara
2
660
GPUを計算資源として使おう!
primenumber
1
260
Goで作る、開発・CI環境
sin392
0
270
Featured
See All Featured
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
Navigating Team Friction
lara
187
15k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.7k
The Cost Of JavaScript in 2023
addyosmani
51
8.6k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
8
340
Testing 201, or: Great Expectations
jmmastey
43
7.6k
Git: the NoSQL Database
bkeepers
PRO
430
65k
Intergalactic Javascript Robots from Outer Space
tanoku
271
27k
Art, The Web, and Tiny UX
lynnandtonic
299
21k
How to Think Like a Performance Engineer
csswizardry
25
1.7k
Building an army of robots
kneath
306
45k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Transcript
Apollo Code Generation
Introduction Yuya Horita iOS Engineer @CyberAgent, 2017/4 ~ 2019/5 Software
Engineer @M3, 2019/5 ~ GitHub: https://github.com/horita-yuya Twitter: https://twitter.com/horita_yuya Medium: https://medium.com/@yuyaHorita
None
schema.json *.graphql ʴ
schema.json File contains the results of an introspection query, or
query information > Conventionally this file is called schema.json Reference: https://www.apollographql.com/docs/ios/downloading-schema/
*.graphql Query definition file
schema.json *.graphql ʴ
schema.json *.graphql Token AST IR →
Lexer .graphql to Tokens
User.graphql
User.graphql Tokens query User ( $ id email @ include
… AddressFragment Debug : response ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~ ~~~~~
query User ( $ @ … AddressFragment NAME Kind Value
undefined undefined undefined undefined COMMENT Debug Ignoring on parsing phase name : undefined
`#` itself is not a token kind. -> Other ways
to comment out, like `/**/`?
https://github.com/graphql/graphql-js/blob/master/src/language/lexer.js#L187 https://github.com/graphql/graphql-spec/issues/276 Reading implementation of lexer, it seems only `#`
indicates comment.
Parser Tokens to AST
query User AddressFragment NAME NAME NAME Operation definition name NAME
Tokens Semantics Operation name field name Fragment name
( $ @ … Beginning of definition of arguments, etc.
Variable Directive Fragment/Inline Fragment Spread Tokens : Argument, Alias, etc. Semantics
NAME Token: Semantics depends on syntax and value. Punctuator Token:
Semantics is fixed or depends on syntax ( $ : @
None
Document Hoge parsing operation function parseHoge is defined in graphql/language/parser.js
= OperationDefinition OperationType Name VariableDefinitions VariableDefinition SelectionSet VariableDefinition Recursive Descent Parsing
Tokens Rules + Starts with operation definition keyword `query`. The
next `User` is operation name. If `(` exists in just after `User`, variable definitions starts. It will end with `)`. Next `{` means the beginning of definition of SelectionSet ……
VariableDefinitions Document OperationDefinition FragmentDefinition AST OperationType VariableDefinition VariableDefinition
IR Generator AST to IR
None
None
None
VariableDefinition Type Variable Name value: string Name value: string
Type Variable Name value: id Name value: Int! VariableDefinitions VariableDefinition
VariableDefinition Type Variable Name value: withEmail Name value: Boolean!
VariableDefinitions VariableDefinition VariableDefinition + schema.json GraphQLType GraphQLType Type Variable Name
value: id Name value: Int! Type Variable Name value: withEmail Name value: Boolean!
IR
IR CompilerContext LegacyCompilerContext
Summary 1. AST from *.graphql. 2. IR from ast and
schema.json. 3. .swift, .ts, .scala from IR 4. It seems .kt doesn’t use apollo-tooling. All implementations are in apollo-android.
Appendix
Lexer Lexer: https://github.com/graphql/graphql-js/blob/master/src/language/lexer.js Token Kind: https://github.com/graphql/graphql-js/blob/master/src/language/tokenKind.js
Parser Parser: https://github.com/graphql/graphql-js/blob/master/src/language/parser.js AST: https://github.com/graphql/graphql-js/blob/master/src/language/ast.js AST Kind: https://github.com/graphql/graphql-js/blob/master/src/language/kinds.js
IR Compiler: https://github.com/apollographql/apollo-tooling/blob/master/packages/apollo-codegen- core/src/compiler/index.ts