Add self keyword as a possible name kind in ClosureCaptureSyntax.

Author: MAJKFL

CodeGeneration/Sources/SyntaxSupport/ExprNodes.swift

@@ -341,7 +341,7 @@ public let EXPR_NODES: [Node] = [
       ),
       Child(
         name: "name",
-        kind: .token(choices: [.token(.identifier)])
+        kind: .token(choices: [.token(.identifier), .keyword(.self)])
       ),
       Child(
         name: "initializer",

Sources/SwiftParser/generated/Parser+TokenSpecSet.swift

@@ -560,6 +560,58 @@ extension ClosureCaptureSpecifierSyntax {
   }
 }
 
+extension ClosureCaptureSyntax {
+  @_spi(Diagnostics)
+  public enum NameOptions: TokenSpecSet {
+    case identifier
+    case `self`
+    
+    init?(lexeme: Lexer.Lexeme, experimentalFeatures: Parser.ExperimentalFeatures) {
+      switch PrepareForKeywordMatch(lexeme) {
+      case TokenSpec(.identifier):
+        self = .identifier
+      case TokenSpec(.self):
+        self = .self
+      default:
+        return nil
+      }
+    }
+    
+    public init?(token: TokenSyntax) {
+      switch token {
+      case TokenSpec(.identifier):
+        self = .identifier
+      case TokenSpec(.self):
+        self = .self
+      default:
+        return nil
+      }
+    }
+    
+    var spec: TokenSpec {
+      switch self {
+      case .identifier:
+        return .identifier
+      case .self:
+        return .keyword(.self)
+      }
+    }
+    
+    /// Returns a token that satisfies the `TokenSpec` of this case.
+    ///
+    /// If the token kind of this spec has variable text, e.g. for an identifier, this returns a token with empty text.
+    @_spi(Diagnostics)
+    public var tokenSyntax: TokenSyntax {
+      switch self {
+      case .identifier:
+        return .identifier("")
+      case .self:
+        return .keyword(.self)
+      }
+    }
+  }
+}
+
 extension ClosureParameterSyntax {
   @_spi(Diagnostics)
   public enum FirstNameOptions: TokenSpecSet {

Sources/SwiftSyntax/generated/raw/RawSyntaxValidation.swift

@@ -567,7 +567,7 @@ func validateLayout(layout: RawSyntaxBuffer, as kind: SyntaxKind) {
     assertNoError(kind, 0, verify(layout[0], as: RawUnexpectedNodesSyntax?.self))
     assertNoError(kind, 1, verify(layout[1], as: RawClosureCaptureSpecifierSyntax?.self))
     assertNoError(kind, 2, verify(layout[2], as: RawUnexpectedNodesSyntax?.self))
-    assertNoError(kind, 3, verify(layout[3], as: RawTokenSyntax.self, tokenChoices: [.tokenKind(.identifier)]))
+    assertNoError(kind, 3, verify(layout[3], as: RawTokenSyntax.self, tokenChoices: [.tokenKind(.identifier), .keyword("self")]))
     assertNoError(kind, 4, verify(layout[4], as: RawUnexpectedNodesSyntax?.self))
     assertNoError(kind, 5, verify(layout[5], as: RawInitializerClauseSyntax?.self))
     assertNoError(kind, 6, verify(layout[6], as: RawUnexpectedNodesSyntax?.self))

Sources/SwiftSyntax/generated/syntaxNodes/SyntaxNodesC.swift

@@ -1528,7 +1528,7 @@ public struct ClosureCaptureSpecifierSyntax: SyntaxProtocol, SyntaxHashable, _Le
 /// ### Children
 /// 
 ///  - `specifier`: ``ClosureCaptureSpecifierSyntax``?
-///  - `name`: `<identifier>`
+///  - `name`: (`<identifier>` | `self`)
 ///  - `initializer`: ``InitializerClauseSyntax``?
 ///  - `trailingComma`: `,`?
 ///
@@ -1627,7 +1627,9 @@ public struct ClosureCaptureSyntax: SyntaxProtocol, SyntaxHashable, _LeafSyntaxN
 
   /// ### Tokens
   /// 
-  /// For syntax trees generated by the parser, this is guaranteed to be `<identifier>`.
+  /// For syntax trees generated by the parser, this is guaranteed to be one of the following kinds:
+  ///  - `<identifier>`
+  ///  - `self`
   public var name: TokenSyntax {
     get {
       return Syntax(self).child(at: 3)!.cast(TokenSyntax.self)