Mastering SwiftSyntax

- Introduction
- SwiftSyntax Overview
- Anatomy of Syntax Tree
- SwiftSyntax API
- Exercises
- Swift Macros
- SwiftLint
- Source Editor Extensions

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7. let number = 100 SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let 4ZOUBY
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8. let sourceFile = Parser.parse(source: "let number = 100") print(sourceFile.debugDescription) import SwiftParser 4XJGU
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9. SourceFileSyntax ├─statements: CodeBlockItemListSyntax │ ╰─[0]: CodeBlockItemSyntax │ ╰─item: VariableDeclSyntax │ ├─attributes: AttributeListSyntax │ ├─modifiers: DeclModifierListSyntax │ ├─bindingSpecifier: keyword(SwiftSyntax.Keyword.let) │ ╰─bindings: PatternBindingListSyntax │ ╰─[0]: PatternBindingSyntax │ ├─pattern: IdentifierPatternSyntax │ │ ╰─identifier: identifier("number") │ ╰─initializer: InitializerClauseSyntax │ ├─equal: equal │ ╰─value: IntegerLiteralExprSyntax │ ╰─literal: integerLiteral("100") ╰─endOfFileToken: endOfFile let sourceFile = Parser.parse(source: "let number = 100") print(sourceFile.debugDescription) // 509.0.0 or later
10. let number = 100 let amount = 100 3FXSJUF
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11. SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let
12. SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let
13. SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile amount = 100 let SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let
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15. let number = 100 SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let
16. let number = 100 SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let
17. let number = 100 SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let
18. πϦʔߏ଄ΛԼํ޲ʹͨͲΔ SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken let sourceFile = Parser.parse(source: "let number = 100")
19. SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken let statements = sourceFile.statements SourceFileSyntax
20. let statements = Array(sourceFile.statements) SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken
21. let statements = Array(sourceFile.statements) let codeBlock = statements[0] CodeBlockItemSyntax SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken
22. let statements = Array(sourceFile.statements) let codeBlock = statements[0] let item = codeBlock.item SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken
23. SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken let statements = Array(sourceFile.statements) let codeBlock = statements[0] let item = codeBlock.item print(item.syntaxNodeType) print(item.syntaxNodeType)
24. let statements = Array(sourceFile.statements) let codeBlock = statements[0] let item = codeBlock.item print(item.syntaxNodeType) SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken VariableDeclSyntax
25. SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken let statements = Array(sourceFile.statements) let codeBlock = statements[0] let item = codeBlock.item if let decl = item.as(VariableDeclSyntax.self) { } item.as(VariableDeclSyntax.self)
26. SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken let statements = Array(sourceFile.statements) let codeBlock = statements[0] let item = codeBlock.item if let decl = item.as(VariableDeclSyntax.self) { let bindings = Array(decl.bindings) }
27. let statements = Array(sourceFile.statements) let codeBlock = statements[0] let item = codeBlock.item if let decl = item.as(VariableDeclSyntax.self) { let bindings = Array(decl.bindings) let binding = bindings[0] } SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken
28. let statements = Array(sourceFile.statements) let codeBlock = statements[0] let item = codeBlock.item if let decl = item.as(VariableDeclSyntax.self) { let bindings = Array(decl.bindings) let binding = bindings[0] if let pattern = binding.pattern.as( IdentifierPatternSyntax.self ) { } } SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken
29. let statements = Array(sourceFile.statements) let codeBlock = statements[0] let item = codeBlock.item if let decl = item.as(VariableDeclSyntax.self) { let bindings = Array(decl.bindings) let binding = bindings[0] if let pattern = binding.pattern.as( IdentifierPatternSyntax.self ) { let identifier = pattern.identifier } } SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken if let pattern = binding.pattern.as( IdentifierPatternSyntax.self ) { let identifier = pattern.identifier }
30. let number = 100 SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let
31. let number = 100 SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let
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36. πϦʔߏ଄Λ্ํ޲ʹͨͲΔ if let pattern = identifier.parent?.as( IdentifierPatternSyntax.self ) { if let binding = pattern.parent?.as( PatternBindingSyntax.self ) { } } SourceFileSyntax ├─statements │ ╰─[0] │ ╰─item │ ├─attributes │ ├─modifiers │ ├─bindingSpecifier │ ╰─bindings │ ╰─[0] │ ├─pattern │ │ ╰─identifier: "number" │ ╰─initializer │ ├─equal: equal │ ╰─value │ ╰─literal: "100" ╰─endOfFileToken
37. ιʔείʔυͷॻ͖׵͑ identifier.with(\.tokenKind, .identifier("amount"))
38. ιʔείʔυͷॻ͖׵͑ identifier.with(\.tokenKind, .identifier("amount")) amount number
39. identifier.with(\.tokenKind, .identifier("amount")) IdentifierPatternSyntax number IdentifierPatternSyntax amount ผͷ৽͍͠5SFFΛฦ͢
40. let result = decl.with( \.bindings, [ binding.with( \.pattern, PatternSyntax( pattern.with( \.identifier, identifier.with( \.tokenKind, .identifier("amount") ) ) ) ) ] ) let number = 100 let amount = 100
41. let result = decl.with( \.bindings, [ binding.with( \.pattern, PatternSyntax( pattern.with( \.identifier, identifier.with( \.tokenKind, .identifier("amount") ) ) ) ) ] ) let number = 100 let amount = 100 ݩͷཁૉ ݩͷཁૉ ݩͷཁૉ ͜ͷཁૉ͚ͩม͑Δ
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47. VariableDeclSyntax ├─attributes: AttributeListSyntax ├─modifiers: DeclModifierListSyntax ├─bindingSpecifier: keyword(SwiftSyntax.Keyword.let) ╰─bindings: PatternBindingListSyntax ╰─[0]: PatternBindingSyntax ├─pattern: IdentifierPatternSyntax │ ╰─identifier: identifier("number") ╰─initializer: InitializerClauseSyntax ├─equal: equal ╰─value: IntegerLiteralExprSyntax ╰─literal: integerLiteral("100") let /* let number defines a constant. */ number = 100 print(sourceFile.debugDescription)
48. VariableDeclSyntax ├─attributes: AttributeListSyntax ├─modifiers: DeclModifierListSyntax ├─bindingSpecifier: keyword(SwiftSyntax.Keyword.let) trailingTrivia=[spaces(1), blockComment("..."), spaces(1)] ╰─bindings: PatternBindingListSyntax ╰─[0]: PatternBindingSyntax ├─pattern: IdentifierPatternSyntax │ ╰─identifier: identifier("number") trailingTrivia=spaces(1) ╰─initializer: InitializerClauseSyntax ├─equal: equal trailingTrivia=spaces(1) ╰─value: IntegerLiteralExprSyntax ╰─literal: integerLiteral("100") print(sourceFile.debugDescription(includeTrivia: true)) let /* let number defines a constant. */ number = 100
49. VariableDeclSyntax ├─attributes: AttributeListSyntax ├─modifiers: DeclModifierListSyntax ├─bindingSpecifier: keyword(SwiftSyntax.Keyword.let) trailingTrivia=[spaces(1), blockComment("..."), spaces(1)] ╰─bindings: PatternBindingListSyntax ╰─[0]: PatternBindingSyntax ├─pattern: IdentifierPatternSyntax │ ╰─identifier: identifier("number") trailingTrivia=spaces(1) ╰─initializer: InitializerClauseSyntax ├─equal: equal trailingTrivia=spaces(1) ╰─value: IntegerLiteralExprSyntax ╰─literal: integerLiteral("100") print(sourceFile.debugDescription(includeTrivia: true)) let /* let number defines a constant. */ number = 100
50. VariableDeclSyntax ├─attributes: AttributeListSyntax ├─modifiers: DeclModifierListSyntax ├─bindingSpecifier: keyword(SwiftSyntax.Keyword.let) trailingTrivia=[spaces(1), blockComment("..."), spaces(1)] ╰─bindings: PatternBindingListSyntax ╰─[0]: PatternBindingSyntax ├─pattern: IdentifierPatternSyntax │ ╰─identifier: identifier("number") trailingTrivia=spaces(1) ╰─initializer: InitializerClauseSyntax ├─equal: equal trailingTrivia=spaces(1) ╰─value: IntegerLiteralExprSyntax ╰─literal: integerLiteral("100") print(sourceFile.debugDescription(includeTrivia: true)) let /* let number defines a constant. */ number = 100
51. CodeBlockItem PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax number VariableDeclSyntax let number = 100 3PVOE5SJQ
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52. SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let let number = 100
53. @nonobjc public let number: Int = 100 SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let AttributeListSyntax @ IdentifierTypeSyntax nonobjc DeclModifierListSyntax DeclModifierSyntax public
54. @nonobjc public let number: Int = 100 SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let AttributeListSyntax @ IdentifierTypeSyntax nonobjc DeclModifierListSyntax DeclModifierSyntax public
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58. SyntaxProtocol SourceFileSyntax Pr S DeclSyntax S CodeBlockItem S VariableDeclSyntax S
59. SyntaxProtocol SourceFileSyntax Pr S DeclSyntax S CodeBlockItem S VariableDeclSyntax S
60. SyntaxProtocol TokenSyntax Pr S DeclSynta S VariableDeclS S SourceFileSyntax S 5PLFO τʔΫϯ 4ZOUBY ߏจ
61. SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let let number = 100 5PLFO
62. SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let let number = 100 5PLFO
63. SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax VariableDeclSyntax PatternBindingListSyntax PatternBindingSyntax IdentifierPatternSyntax InitializerClauseSyntax IntegerLiteralExprSyntax endOfFile number = 100 let let number = 100 5PLFO
64. let number = 100 5PLFO 4ZOUBY
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66. if let decl = item.as(VariableDeclSyntax.self) { ... } if let decl = item as? VariableDeclSyntax { } ϊʔυͷܕΛม׵͢Δ ܕม׵ͷؔ਺Λ࢖͏
67. ϊʔυͷܕΛม׵͢Δ if let decl = item.as(VariableDeclSyntax.self) { // == `as?` operator } if item.is(VariableDeclSyntax.self) { == `is` operator } let decl = item.cast(VariableDeclSyntax.self) // Force cast (== as!) let decl = VariableDeclSyntax(item) // == `as?` operator ܕม׵ͷؔ਺Λ࢖͏
68. ϊʔυͷܕΛม׵͢Δ if let decl = item.as(VariableDeclSyntax.self) { // == `as?` operator } if item.is(VariableDeclSyntax.self) { == `is` operator } let decl = item.cast(VariableDeclSyntax.self) // Force cast (== as!) let decl = VariableDeclSyntax(item) // == `as?` operator ܕม׵ͷؔ਺Λ࢖͏
69. ϊʔυͷܕΛม׵͢Δ if let decl = item.as(VariableDeclSyntax.self) { // == `as?` operator } if item.is(VariableDeclSyntax.self) { == `is` operator } let decl = item.cast(VariableDeclSyntax.self) // Force cast (== as!) let decl = VariableDeclSyntax(item) // == `as?` operator ܕม׵ͷؔ਺Λ࢖͏
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75. ␣␣␣␣let␣ number␣ =␣ 100↲ 5PLFO4ZOUBY keyword(Keyword.let) endOfFile integerLiteral("100") identifier("number") let firstToken = sourceFile.firstToken(viewMode: .sourceAccurate) let lastToken = sourceFile.lastToken(viewMode: .sourceAccurate) let previousToken = lastToken?.previousToken(viewMode: .sourceAccurate) let nextToken = firstToken?.nextToken(viewMode: .sourceAccurate) /BWJHBUF
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    αϒΫϥεͰॲཧΛ͢Δର৅ͷϊʔυͷWJTJUؔ਺ΛΦʔόʔϥΠυ͢Δ
    r 4ZOUBY3FXSJUFS
    ‣ 4ZOUBY7JTJUPSͷػೳʹՃ͑ͯɺWJTJUؔ਺ͰͨͲͬͨϊʔυΛผͷϊʔυʹॻ ͖׵͑Δ͜ͱ͕Ͱ͖Δ
    ‣ ϚΫϩ΍ϦϑΝΫλϦϯάɺϑΥʔϚολʔͳͲ4ZOUBY
    5SFFΛ༻͍ͯιʔε ίʔυΛม׵͢Δ༻్ʹ෯޿͘࢖ΘΕΔ 4XJGU4ZOUBY
    "1* 4ZOUBY7JTJUPS
    
    4ZOUBY3FXSJUFS
78. 4ZOUBY7JTJUPS
    
    4ZOUBY3FXSJUFS visit() visit() visit() visit() visit() visit() visit() visit() visit() visit() visit() visit() visit()
79. 4ZOUBY7JTJUPS open class SyntaxVisitor { public init(viewMode: SyntaxTreeViewMode) public func walk(_ node: some SyntaxProtocol) open func visit(_ node: AccessorBlockSyntax) -> SyntaxVisitorContinueKind open func visitPost(_ node: AccessorBlockSyntax) open func visit(_ node: AccessorDeclSyntax) -> SyntaxVisitorContinueKind open func visitPost(_ node: AccessorDeclSyntax) ... }
80. 4ZOUBY7JTJUPS open class SyntaxVisitor { public init(viewMode: SyntaxTreeViewMode) public func walk(_ node: some SyntaxProtocol) open func visit(_ node: AccessorBlockSyntax) -> SyntaxVisitorContinueKind open func visitPost(_ node: AccessorBlockSyntax) open func visit(_ node: AccessorDeclSyntax) -> SyntaxVisitorContinueKind open func visitPost(_ node: AccessorDeclSyntax) ... } ୳ࡧ͢Δର৅ͷܕͷϊʔυͷ
    WJTJUؔ਺ΛΦʔόʔϥΠυ͢Δ
81. &YBNQMF
    'JOE
    "MM
    GBUBM&SSPS
    'VODUJPO
    $BMMT 4ZOUBY7JTJUPS class FatalErrorChecker: SyntaxVisitor { override func visit(_ node: FunctionCallExprSyntax) -> SyntaxVisitorContinueKind { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { ... } } return .visitChildren } }
82. &YBNQMF
    'JOE
    "MM
    GBUBM&SSPS
    'VODUJPO
    $BMMT 4ZOUBY7JTJUPS class FatalErrorChecker: SyntaxVisitor { override func visit(_ node: FunctionCallExprSyntax) -> SyntaxVisitorContinueKind { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { ... } } return .visitChildren } }
83. &YBNQMF
    'JOE
    "MM
    GBUBM&SSPS
    'VODUJPO
    $BMMT 4ZOUBY7JTJUPS class FatalErrorChecker: SyntaxVisitor { override func visit(_ node: FunctionCallExprSyntax) -> SyntaxVisitorContinueKind { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { ... } } return .visitChildren } }
84. ιʔείʔυͷςΩετΛൺֱ if calledExpression.baseName.tokenKind == .identifier("fatalError") { ... } *EFOUJGZ
    UIF
    /PEF
    PG
    *OUFSFTU
85. ιʔείʔυͷςΩετΛൺֱ if calledExpression.baseName.tokenKind == .identifier("fatalError") { ... } if calledExpression.baseName.trimmed.description == "fatalError" { ... } if calledExpression.baseName.text == "fatalError" { ... } if calledExpression.baseName.description == "fatalError" { ... }
86. ιʔείʔυͷςΩετΛൺֱ if calledExpression.baseName.tokenKind == .identifier("fatalError") { ... } if calledExpression.baseName.trimmed.description == "fatalError" { ... } if calledExpression.baseName.text == "fatalError" { ... } if calledExpression.baseName.description == "fatalError" { ... } public extension SyntaxProtocol { ... var trimmed: Self { return self .with(\.leadingTrivia, []) .with(\.trailingTrivia, []) } ... }
87. ιʔείʔυͷςΩετΛൺֱ 4XJGU4ZOUBY#VJMEFS if calledExpression.baseName == "fatalError" { ... } import SwiftSyntaxBuilder ... 4USJOHϦςϥϧ͔Β4ZOUBY͕࡞ΒΕΔͷͰ
    ίϯύΠϧΤϥʔʹͳΒͳ͍
88. 4ZOUBY"OZ7JTJUPS &YBNQMF
    $POWFSU
    4ZOUBY
    5SFF
    UP
    )5.- class HTMLConverter: SyntaxAnyVisitor { var html = "<!DOCTYPE html>" override func visitAny(_ node: Syntax) -> SyntaxVisitorContinueKind { html += #"<span class="\#(node.syntaxNodeType)">"# return .visitChildren } override func visitAnyPost(_ node: Syntax) { html += "</span>" } }
89. 4ZOUBY"OZ7JTJUPS &YBNQMF
    $POWFSU
    4ZOUBY
    5SFF
    UP
    )5.- class HTMLConverter: SyntaxAnyVisitor { var html = "<!DOCTYPE html>" override func visitAny(_ node: Syntax) -> SyntaxVisitorContinueKind { html += #"<span class="\#(node.syntaxNodeType)">"# return .visitChildren } override func visitAnyPost(_ node: Syntax) { html += "</span>" } }
90. class HTMLConverter: SyntaxAnyVisitor { var html = "<!DOCTYPE html>" override func visitAny(_ node: Syntax) -> SyntaxVisitorContinueKind { html += #"<span class="\#(node.syntaxNodeType)">"# return .visitChildren } override func visitAnyPost(_ node: Syntax) { html += "</span>" } override func visit(_ node: TokenSyntax) -> SyntaxVisitorContinueKind { html += node.description return .visitChildren } override func visitPost(_ node: TokenSyntax) {} }
91. class HTMLConverter: SyntaxAnyVisitor { var html = "<!DOCTYPE html>" override func visitAny(_ node: Syntax) -> SyntaxVisitorContinueKind { html += #"<span class="\#(node.syntaxNodeType)">"# return .visitChildren } override func visitAnyPost(_ node: Syntax) { html += "</span>" } override func visit(_ node: TokenSyntax) -> SyntaxVisitorContinueKind { html += node.description return .visitChildren } override func visitPost(_ node: TokenSyntax) {} } visitAnyPost()͕ݺ͹Εͳ͍Α͏ʹ
92. class HTMLConverter: SyntaxAnyVisitor { var html = "<!DOCTYPE html>" override func visitAny(_ node: Syntax) -> SyntaxVisitorContinueKind { html += #"<span class="\#(node.syntaxNodeType)">"# return .visitChildren } override func visitAnyPost(_ node: Syntax) { html += "</span>" } override func visit(_ node: TokenSyntax) -> SyntaxVisitorContinueKind { html += node.description return .visitChildren } override func visitPost(_ node: TokenSyntax) {} } var kind = "\(node.tokenKind)" if let index = kind.firstIndex(of: "(") { kind = String(kind.prefix(upTo: index)) } if kind.hasSuffix("Keyword") { kind = "keyword" } html += node.leadingTrivia.pieces.map { $0.htmlEscaped() }.joined() html += """ <span class="\(kind.htmlEscaped())">\(node.text.htmlEscaped())</span> """ html += node.trailingTrivia.pieces.map { $0.htmlEscaped() }.joined() return .visitChildren
93. ... <span class="SourceFileSyntax"> <span class="CodeBlockItemListSyntax"> <span class="CodeBlockItemSyntax"> <span class="VariableDeclSyntax"> <span class="AttributeListSyntax"></span> <span class="DeclModifierListSyntax"></span> <span class="keyword">let</span>&nbsp; <span class="PatternBindingListSyntax"> <span class="PatternBindingSyntax"> <span class="IdentifierPatternSyntax"> <span class="identifier">number</span>&nbsp;</span> <span class="InitializerClauseSyntax"> <span class="equal">=</span>&nbsp; <span class="IntegerLiteralExprSyntax"> <span class="integerLiteral">100</span></span> </span> </span> </span> </span> </span> </span> <span class="endOfFile"></span> </span> ...
96. 4ZOUBY3FXSJUFS open class SyntaxRewriter { public func rewrite(_ node: some SyntaxProtocol) -> Syntax open func visitPre(_ node: Syntax) open func visitAny(_ node: Syntax) -> Syntax? open func visitPost(_ node: Syntax) open func visit(_ node: AccessorBlockSyntax) -> AccessorBlockSyntax open func visit(_ node: AccessorDeclListSyntax) -> AccessorDeclListSyntax ...
97. 4ZOUBY3FXSJUFS open class SyntaxRewriter { public func rewrite(_ node: some SyntaxProtocol) -> Syntax open func visitPre(_ node: Syntax) open func visitAny(_ node: Syntax) -> Syntax? open func visitPost(_ node: Syntax) open func visit(_ node: AccessorBlockSyntax) -> AccessorBlockSyntax open func visit(_ node: AccessorDeclListSyntax) -> AccessorDeclListSyntax ... ฦͨ͠ϊʔυͷ಺༰Ͱ 4ZOUBY
    5SFF͕ॻ͖׵ΘΔ
98. 4ZOUBY3FXSJUFS open class SyntaxRewriter { public func rewrite(_ node: some SyntaxProtocol) -> Syntax open func visitPre(_ node: Syntax) open func visitAny(_ node: Syntax) -> Syntax? open func visitPost(_ node: Syntax) open func visit(_ node: AccessorBlockSyntax) -> AccessorBlockSyntax open func visit(_ node: AccessorDeclListSyntax) -> AccessorDeclListSyntax ... WJTJU"OZ @
99. 4ZOUBY3FXSJUFS open class SyntaxRewriter { public func rewrite(_ node: some SyntaxProtocol) -> Syntax open func visitPre(_ node: Syntax) open func visitAny(_ node: Syntax) -> Syntax? open func visitPost(_ node: Syntax) open func visit(_ node: AccessorBlockSyntax) -> AccessorBlockSyntax open func visit(_ node: AccessorDeclListSyntax) -> AccessorDeclListSyntax ... WJTJU1SF @
100. class FatalToPreconditionRewriter: SyntaxRewriter { override func visit(_ node: FunctionCallExprSyntax) -> ExprSyntax { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { return super.visit( ExprSyntax( node.with( \.calledExpression, ExprSyntax( calledExpression .with(\.baseName, .identifier("preconditionFailure")) .with(\.leadingTrivia, calledExpression.leadingTrivia) ) ) ) ) } } return super.visit(node) } }
101. class FatalToPreconditionRewriter: SyntaxRewriter { override func visit(_ node: FunctionCallExprSyntax) -> ExprSyntax { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { return super.visit( ExprSyntax( node.with( \.calledExpression, ExprSyntax( calledExpression .with(\.baseName, .identifier("preconditionFailure")) .with(\.leadingTrivia, calledExpression.leadingTrivia) ) ) ) ) } } return super.visit(node) } }
102. class FatalToPreconditionRewriter: SyntaxRewriter { override func visit(_ node: FunctionCallExprSyntax) -> ExprSyntax { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { return super.visit( ExprSyntax( node.with( \.calledExpression, ExprSyntax( calledExpression .with(\.baseName, .identifier("preconditionFailure")) .with(\.leadingTrivia, calledExpression.leadingTrivia) ) ) ) ) } } return super.visit(node) } }
103. class FatalToPreconditionRewriter: SyntaxRewriter { override func visit(_ node: FunctionCallExprSyntax) -> ExprSyntax { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { return super.visit( ExprSyntax( node.with( \.calledExpression, ExprSyntax( calledExpression .with(\.baseName, .identifier("preconditionFailure")) .with(\.leadingTrivia, calledExpression.leadingTrivia) ) ) ) ) } } return super.visit(node) } } ݩͷιʔείʔυͷ5SJWJBΛ ͦͷ··෮ݩ͢Δ
104. class FatalToPreconditionRewriter: SyntaxRewriter { override func visit(_ node: FunctionCallExprSyntax) -> ExprSyntax { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { return super.visit( ExprSyntax( node.with( \.calledExpression, ExprSyntax( calledExpression .with(\.baseName, .identifier("preconditionFailure")) .with(\.leadingTrivia, calledExpression.leadingTrivia) ) ) ) ) } } return super.visit(node) } } ʮࣜʯͷߏจͷϕʔεϊʔυ Ͱ͋Δ&YQS4ZOUBYܕΛฦ͢
105. class FatalToPreconditionRewriter: SyntaxRewriter { override func visit(_ node: FunctionCallExprSyntax) -> ExprSyntax { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { return super.visit( ExprSyntax( node.with( \.calledExpression, ExprSyntax( calledExpression .with(\.baseName, .identifier("preconditionFailure")) .with(\.leadingTrivia, calledExpression.leadingTrivia) ) ) ) ) } } return super.visit(node) } }
106. class FatalToPreconditionRewriter: SyntaxRewriter { override func visit(_ node: FunctionCallExprSyntax) -> ExprSyntax { if let calledExpression = node.calledExpression.as(DeclReferenceExprSyntax.self) { if calledExpression.baseName.tokenKind == .identifier("fatalError") { return super.visit( ExprSyntax( node.with( \.calledExpression, ExprSyntax( calledExpression .with(\.baseName, .identifier("preconditionFailure")) .with(\.leadingTrivia, calledExpression.leadingTrivia) ) ) ) ) } } return super.visit(node) } } TVQFSΛݺͿͱࢠཁૉͷ୳ࡧΛଓ͚Δ
107. 4ZOUBY3FXSJUFS #BTF
     /PEFT r %FDM4ZOUBY
     
     એݴ
     ‣ ม਺ɺؔ਺ɺΫϥεͷએݴͳͲ
     r &YQS4ZOUBY
     
     ࣜ ஋Λฦ͢
     ‣ ஋Λฦ͢ߏจɻؔ਺ݺͼग़͠ɺϓϩύςΟΞΫηεɺΫϩʔδϟͳͲ
     r 1BUUFSO4ZOUBY
     ‣ 4XJUDIจͷ$BTFઅ΍ม਺એݴ಺ͷม਺ͷఆٛͳͲ
     r 5ZQF4ZOUBY
     ‣ ܕΞϊςʔγϣϯͳͲ
108. 4ZOUBY3FXSJUFS #BTF
     /PEFT // Non-failable initializer let expr = ExprSyntax(MemberAccessExprSyntax(name: .identifier("red"))) .red
109. 4ZOUBY3FXSJUFS #BTF
     /PEFT // Non-failable initializer let expr = ExprSyntax(MemberAccessExprSyntax(name: .identifier("red"))) // Failable initializer let decl = DeclSyntax(MemberAccessExprSyntax(name: .identifier("red"))) .red nil
110. 4PVSDF
     -PDBUJPO 4PVSDF-PDBUJPO$POWFSUFS let sourceFile = Parser.parse(source: "let number = 100") let locationConverter = SourceLocationConverter(fileName: "", tree: sourceFile) ... let identifier = pattern.identifier let start = identifier.startLocation(converter: locationConverter) let end = identifier.endLocation(converter: locationConverter) print("\(start.line):\(start.column)...\(end.line):\(end.column)") 1:5...1:11
111. 4PVSDF
     -PDBUJPO 4PVSDF-PDBUJPO$POWFSUFS let sourceFile = Parser.parse(source: "let number = 100") let locationConverter = SourceLocationConverter(fileName: "", tree: sourceFile) ... let identifier = pattern.identifier let start = identifier.startLocation(converter: locationConverter) let end = identifier.endLocation(converter: locationConverter) print("\(start.line):\(start.column)...\(end.line):\(end.column)") 1:5...1:11 let start = identifier.startLocation(converter: locationConverter) let end = identifier.endLocation(converter: locationConverter) print("\(start.line):\(start.column)...\(end.line):\(end.column)") let number = 100 1:5 1:11
112. 4PVSDF
     -PDBUJPO 4PVSDF-PDBUJPO$POWFSUFS func startLocation( converter: SourceLocationConverter, afterLeadingTrivia: Bool = true ) -> SourceLocation func endLocation( converter: SourceLocationConverter, afterTrailingTrivia: Bool = false ) -> SourceLocation number
113. 4XJGU4ZOUBY
     JT
     0OMZ
     "CPVU
     4ZOUBY *U
     %PFTO`U
     ,OPX
     "OZUIJOH
     "CPVU
     5ZQFT
     BOE
     *OIFSJUBODF r 4XJGU4ZOUBY͸ߏจ ςΩετ ͷΈΛѻ͏
     r ܕ৘ใ΍ίϯύΠϧՄೳ͔Ͳ͏͔ͳͲ͸4XJGU4ZOUBY͸Θ͔Βͳ͍
     ‣ ಉ໊͡લͷผͷؔ਺ͷ۠ผ͕͔ͭͳ͍
     ‣ ܕΞϊςʔγϣϯ͕লུ͞Εͨม਺΍Ҿ਺ͷܕ͕Θ͔Βͳ͍
114. 4XJGU4ZOUBY
     JT
     0OMZ
     "CPVU
     4ZOUBY *U
     %PFTO`U
     ,OPX
     "OZUIJOH
     "CPVU
     5ZQFT
     BOE
     *OIFSJUBODF let result = run() IdentifierPatternSyntax
115. let result = run() : Int TypeAnnotationSyntax 4XJGU4ZOUBY
     JT
     0OMZ
     "CPVU
     4ZOUBY *U
     %PFTO`U
     ,OPX
     "OZUIJOH
     "CPVU
     5ZQFT
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     *OIFSJUBODF IdentifierPatternSyntax
116. 1BSTFS
     3FTJMJFODZ 1BSTFS
     /FWFS
     'BJMT r จ๏Τϥʔ͕͋ͬͯ΋ࣗಈతʹͭͭ͡·ͷ߹͏τʔΫϯΛ௥Ճͯ͠ଓߦ͢Δ
     r ਖ਼͘͠ͳ͍จ๏ɺίϯύΠϧͰ͖ͳ͍ιʔείʔυͰ΋1BSTFͰ͖Δ
117. 1BSTFS
     3FTJMJFODZ 1BSTFS
     /FWFS
     'BJMT
118. 1BSTFS
     3FTJMJFODZ 1BSTFS
     /FWFS
     'BJMT 1BSTFS͕ิ׬ͨ͠τʔΫϯ
119. 1BSTFS
     3FTJMJFODZ 1BSTFS
     /FWFS
     'BJMT SyntaxVisitor(viewMode: .sourceAccurate) enum SyntaxTreeViewMode { case sourceAccurate case fixedUp case all } ιʔείʔυʹදࣔ͞ΕΔτʔΫϯͷΈ 1BSTFS͕ิ׬ͨ͠τʔΫϯ΋८ճ͢Δ 1BSTFS͕ิ׬ͨ͠τʔΫϯ͓Αͼ༧ظ͠ͳ͍ϊʔυ΋८ճ͢Δ
120. 1BSTFS
     3FTJMJFODZ 1BSTFS
     /FWFS
     'BJMT r จ๏Τϥʔ͕͋ͬͯ΋ࣗಈతʹͭͭ͡·ͷ߹͏τʔΫϯΛ௥Ճͯ͠ଓߦ͢Δ
     r ਖ਼͘͠ͳ͍จ๏ɺίϯύΠϧͰ͖ͳ͍ιʔείʔυͰ΋1BSTFͰ͖Δ
     r ϚΫϩʹ͸ίϯύΠϥͷνΣοΫޙͷΤϥʔͷͳ͍4ZOUBY
     5SFF͕౉͞ΕΔ
     r ෆ׬શͳίʔυɺΤϥʔΛؚΉ4ZOUBY
     5SFF IBT&SSPSϓϩύςΟΛνΣοΫ ͷѻ͍ʹ஫ҙ
121. &YFSDJTFT
     4XJGU
     .BDSPT *OJU.BDSP
122. 4XJGU
     .BDSPT *OJU.BDSP @Init class Person { let name: String let age: Int let birthday: Date? } class Person { let name: String let age: Int let birthday: Date? }
123. 4XJGU
     .BDSPT *OJU.BDSP @Init class Person { let name: String let age: Int let birthday: Date? } class Person { let name: String let age: Int let birthday: Date? } } init( name: String, age: Int, birthday: Date? ) { self.name = name self.age = age self.birthday = birthday }
124. 4XJGU
     .BDSPT *OJU.BDSP struct InitMacro: MemberMacro { static func expansion( of node: AttributeSyntax, providingMembersOf declaration: some DeclGroupSyntax, in context: some MacroExpansionContext ) throws -> [DeclSyntax] { ... } }
125. 4XJGU
     .BDSPT *OJU.BDSP struct InitMacro: MemberMacro { static func expansion( of node: AttributeSyntax, providingMembersOf declaration: some DeclGroupSyntax, in context: some MacroExpansionContext ) throws -> [DeclSyntax] { ... } } @Init
126. 4XJGU
     .BDSPT *OJU.BDSP struct InitMacro: MemberMacro { static func expansion( of node: AttributeSyntax, providingMembersOf declaration: some DeclGroupSyntax, in context: some MacroExpansionContext ) throws -> [DeclSyntax] { ... } } @Init class Person { let name: String let age: Int let birthday: Date? }
127. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\($0.)\($0.)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\($0.) = \($0.)" }.joined(separator: "\n")) } """ ]
128. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\($0.)\($0.)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\($0.) = \($0.)" }.joined(separator: "\n")) } """ ] class Person { let name: String let age: Int let birthday: Date? }
129. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\($0.)\($0.)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\($0.) = \($0.)" }.joined(separator: "\n")) } """ ] (name, String) (age, Int) (birthday, Date?)
130. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\($0.)\($0.)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\($0.) = \($0.)" }.joined(separator: "\n")) } """ ] (pattern, typeAnnotation)
131. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\(pattern)\(typeAnnotation)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\(pattern) = \(pattern)" }.joined(separator: "\n")) } """ ]
132. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } init( pattern: typeAnnotation, ) { self.pattern = pattern }
133. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\(pattern)\(typeAnnotation)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\(pattern) = \(pattern)" }.joined(separator: "\n")) } """ ] return [ """ init( \(raw: variableDecls.map { "\(pattern)\(typeAnnotation)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\(pattern) = \(pattern)" }.joined(separator: "\n")) } """ ] import SwiftSyntaxBuilder ...
134. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\(pattern)\(typeAnnotation)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\(pattern) = \(pattern)" }.joined(separator: "\n")) } """ ] return [ DeclSyntax( InitializerDeclSyntax( signature: FunctionSignatureSyntax( input: ParameterClauseSyntax( parameterList: FunctionParameterListSyntax( variableDecls.map { (pattern, typeAnnotation) in FunctionParameterSyntax(firstName: pattern.identifier, type: typeAnnotation.type) } ) ) ), body: CodeBlockSyntax( statements: CodeBlockItemListSyntax( variableDecls.map { (pattern, typeAnnotation) in CodeBlockItemSyntax( item: CodeBlockItemSyntax.Item( InfixOperatorExprSyntax( leftOperand: MemberAccessExprSyntax( base: IdentifierExprSyntax(identifier: .keyword(.self)), name: pattern.identifier ), operatorOperand: AssignmentExprSyntax(), rightOperand: IdentifierExprSyntax(identifier: pattern.identifier) ) ) ) } ) ) ) ) ]
135. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\(pattern)\(typeAnnotation)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\(pattern) = \(pattern)" }.joined(separator: "\n")) } """ ] init(name:Stringage:Intbirthday:Date?){self.name=nameself.age=ageself.birthday=birthday}
136. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\(pattern)\(typeAnnotation)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\(pattern) = \(pattern)" }.joined(separator: "\n")) } """ ] init(name: String age: Int birthday: Date?) { self.name = name self.age = age self.birthday = birthday } .formatted(using: BasicFormat())
137. let variableDecls: [(pattern: IdentifierPatternSyntax, typeAnnotation: TypeAnnotationSyntax)] variableDecls = declaration.memberBlock.members.compactMap { guard let decl = $0.decl.as(VariableDeclSyntax.self) else { return nil } guard let binding = decl.bindings.first else { return nil } guard let pattern = binding.pattern.as(IdentifierPatternSyntax.self) else { return nil } guard let typeAnnotation = binding.typeAnnotation else { return nil } return (pattern, typeAnnotation) } return [ """ init( \(raw: variableDecls.map { "\(pattern)\(typeAnnotation)" }.joined(separator: ",\n")) ) { \(raw: variableDecls.map { "self.\(pattern) = \(pattern)" }.joined(separator: "\n")) } """ ] init(name: String age: Int birthday: Date?) { self.name = name self.age = age self.birthday = birthday } .formatted(using: BasicFormat()) struct InitMacro: MemberMacro { static var formatMode: FormatMode = .disabled ...
138. 'PMEJOH
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146. 4XJGU-JOU
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147. 4XJGU-JOU
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148. 4XJGU-JOU
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152. SourceFileSyntax CodeBlockItemListSyntax CodeBlockItemSyntax FunctionDeclSyntax FunctionSignatureSyntax FunctionParameterSyntax FunctionParameterClauseSyntax CodeBlockSyntax CodeBlockItemListSyntax endOfFile ( { } func run FunctionParameterListSyntax )
153. override func visit(_ node: FunctionDeclSyntax) -> DeclSyntax { guard let body = node.body else { return super.visit(node) } let openingBrace = body.leftBrace if !openingBrace.hasSingleSpaceLeading() { let position = openingBrace.positionAfterSkippingLeadingTrivia correctionPositions.append(position) return super.visit( node .with(\.signature, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit(node) }
154. override func visit(_ node: FunctionDeclSyntax) -> DeclSyntax { guard let body = node.body else { return super.visit(node) } let openingBrace = body.leftBrace if !openingBrace.hasSingleSpaceLeading() { let position = openingBrace.positionAfterSkippingLeadingTrivia correctionPositions.append(position) return super.visit( node .with(\.signature, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit(node) }
155. override func visit(_ node: FunctionDeclSyntax) -> DeclSyntax { guard let body = node.body else { return super.visit(node) } let openingBrace = body.leftBrace if !openingBrace.hasSingleSpaceLeading() { let position = openingBrace.positionAfterSkippingLeadingTrivia correctionPositions.append(position) return super.visit( node .with(\.signature, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit(node) }
156. override func visit(_ node: FunctionDeclSyntax) -> DeclSyntax { guard let body = node.body else { return super.visit(node) } let openingBrace = body.leftBrace if !openingBrace.hasSingleSpaceLeading() { let position = openingBrace.positionAfterSkippingLeadingTrivia correctionPositions.append(position) return super.visit( node .with(\.signature, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit(node) } private extension TokenSyntax { func hasSingleSpaceLeading() -> Bool { if let previousToken = previousToken(viewMode: .sourceAccurate), previousToken.trailingTrivia == .space { return true } else { return false } } }
157. override func visit(_ node: FunctionDeclSyntax) -> DeclSyntax { guard let body = node.body else { return super.visit(node) } let openingBrace = body.leftBrace if !openingBrace.hasSingleSpaceLeading() { let position = openingBrace.positionAfterSkippingLeadingTrivia correctionPositions.append(position) return super.visit( node .with(\.signature, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit(node) }
158. override func visit(_ node: FunctionDeclSyntax) -> DeclSyntax { guard let body = node.body else { return super.visit(node) } let openingBrace = body.leftBrace if !openingBrace.hasSingleSpaceLeading() { let position = openingBrace.positionAfterSkippingLeadingTrivia correctionPositions.append(position) return super.visit( node .with(\.signature, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit(node) } func run(name: T) { } ??????????????
162. func run<T>(name: T) where T: StringProtocol { }
163. override func visit(_ node: FunctionDeclSyntax) -> SyntaxVisitorContinueKind { guard let body = node.body else { return super.visit(node) } let openingBrace = body.leftBrace if !openingBrace.hasSingleSpaceLeading() { let position = openingBrace.positionAfterSkippingLeadingTrivia correctionPositions.append(position) if let genericWhereClause = node.genericWhereClause { return super.visit( node .with(\.genericWhereClause, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit( node .with(\.signature, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit(node) }
164. override func visit(_ node: FunctionDeclSyntax) -> SyntaxVisitorContinueKind { guard let body = node.body else { return super.visit(node) } let openingBrace = body.leftBrace if !openingBrace.hasSingleSpaceLeading() { let position = openingBrace.positionAfterSkippingLeadingTrivia correctionPositions.append(position) if let genericWhereClause = node.genericWhereClause { return super.visit( node .with(\.genericWhereClause, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit( node .with(\.signature, node.signature.with(\.trailingTrivia, .space)) .with(\.leftBrace, node.leftBrace.with(\.leadingTrivia, [])) ) } return super.visit(node) }
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170. -BOHVBHF
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     3FGFSFODF Grammar of a getter-setter block getter-setter-block → { getter-clause setter-clause? } | { setter-clause getter-clause } var name: String { get { ... } set { ... } } var name: String { get { ... } }
171. Grammar of a function declaration function-declaration → function-head function-name generic-parameter-clause? function-signature generic-where-clause? function-body? function-head → attributes? declaration-modi fi ers? func function-name → identi fi er | operator function-signature → parameter-clause async? throws? function-result? function-signature → parameter-clause async? rethrows function-result? function-result → -> attributes? type function-body → code-block parameter-clause → ( ) | ( parameter-list ) parameter-list → parameter | parameter , parameter-list parameter → external-parameter-name? local-parameter-name type-annotation default-argument-clause? parameter → external-parameter-name? local-parameter-name type-annotation parameter → external-parameter-name? local-parameter-name type-annotation ... external-parameter-name → identi fi er local-parameter-name → identi fi er default-argument-clause → = expression
172. Grammar of a function declaration function-declaration → function-head function-name generic-parameter-clause? function-signature generic-where-clause? function-body? function-head → attributes? declaration-modi fi ers? func function-name → identi fi er | operator function-signature → parameter-clause async? throws? function-result? function-signature → parameter-clause async? rethrows function-result? function-result → -> attributes? type function-body → code-block parameter-clause → ( ) | ( parameter-list ) parameter-list → parameter | parameter , parameter-list parameter → external-parameter-name? local-parameter-name type-annotation default-argument-clause? parameter → external-parameter-name? local-parameter-name type-annotation parameter → external-parameter-name? local-parameter-name type-annotation ... external-parameter-name → identi fi er local-parameter-name → identi fi er default-argument-clause → = expression
173. Grammar of a function declaration function-declaration → function-head function-name generic-parameter-clause? function-signature generic-where-clause? function-body? function-head → attributes? declaration-modi fi ers? func function-name → identi fi er | operator function-signature → parameter-clause async? throws? function-result? function-signature → parameter-clause async? rethrows function-result? function-result → -> attributes? type function-body → code-block parameter-clause → ( ) | ( parameter-list ) parameter-list → parameter | parameter , parameter-list parameter → external-parameter-name? local-parameter-name type-annotation default-argument-clause? parameter → external-parameter-name? local-parameter-name type-annotation parameter → external-parameter-name? local-parameter-name type-annotation ... external-parameter-name → identi fi er local-parameter-name → identi fi er default-argument-clause → = expression
174. -BOHVBHF
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175. -BOHVBHF
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176. -BOHVBHF
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182. override func visit(_ node: ClassDeclSyntax) -> SyntaxVisitorContinueKind { if let position = node.violationPosition() { violations.append(position) } return .visitChildren } override func visit(_ node: StructDeclSyntax) -> SyntaxVisitorContinueKind { if let position = node.violationPosition() { violations.append(position) } return .visitChildren } ...
183. private extension DeclGroupSyntax { ... func correct<T: SyntaxProtocol>(keyPath: WritableKeyPath<Self, T>) -> Self { return self .with(keyPath, self[keyPath: keyPath].with(\.trailingTrivia, .space)) .with(\.memberBlock, memberBlock.with(\.leadingTrivia, [])) } func correct<T: SyntaxProtocol>(keyPath: WritableKeyPath<Self, T?>) -> Self? { guard let value = self[keyPath: keyPath] else { return nil } return self .with(keyPath, value.with(\.trailingTrivia, .space)) .with(\.memberBlock, memberBlock.with(\.leadingTrivia, [])) } }
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190. 4XJGU-JOU
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191. 4XJGU-JOU
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192. override func visitPost(_ node: DictionaryElementListSyntax) { let locations = node.map { element in let position = alignColons ? element.colon.positionAfterSkippingLeadingTrivia : element.keyExpression.positionAfterSkippingLeadingTrivia let location = locationConverter.location(for: position) let graphemeColumn: Int let graphemeClusters = String( locationConverter.sourceLines[location.line - 1].utf8.prefix(location.column - 1) ) if let graphemeClusters { graphemeColumn = graphemeClusters.count + 1 } else { graphemeColumn = location.column } return SourceLocation( line: location.line, column: graphemeColumn, offset: location.offset, file: location.file ) } violations.append(contentsOf: validate(keyLocations: locations)) }
193. override func visitPost(_ node: DictionaryElementListSyntax) { let locations = node.map { element in let position = alignColons ? element.colon.positionAfterSkippingLeadingTrivia : element.keyExpression.positionAfterSkippingLeadingTrivia let location = locationConverter.location(for: position) let graphemeColumn: Int let graphemeClusters = String( locationConverter.sourceLines[location.line - 1].utf8.prefix(location.column - 1) ) if let graphemeClusters { graphemeColumn = graphemeClusters.count + 1 } else { graphemeColumn = location.column } return SourceLocation( line: location.line, column: graphemeColumn, offset: location.offset, file: location.file ) } violations.append(contentsOf: validate(keyLocations: locations)) } locationConverter.sourceLines[location.line - 1].utf8.prefix(location.column - 1) ݩͷιʔείʔυ͕ߦ͝ͱʹ֨ೲ͞Εͨ഑ྻ
194. override func visitPost(_ node: DictionaryElementListSyntax) { let locations = node.map { element in let position = alignColons ? element.colon.positionAfterSkippingLeadingTrivia : element.keyExpression.positionAfterSkippingLeadingTrivia let location = locationConverter.location(for: position) let graphemeColumn: Int let graphemeClusters = String( locationConverter.sourceLines[location.line - 1].utf8.prefix(location.column - 1) ) if let graphemeClusters { graphemeColumn = graphemeClusters.count + 1 } else { graphemeColumn = location.column } return SourceLocation( line: location.line, column: graphemeColumn, offset: location.offset, file: location.file ) } violations.append(contentsOf: validate(keyLocations: locations)) } 29 31
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