[sending] Add support for sending

CodeGeneration/Sources/SyntaxSupport/DeclNodes.swift

@@ -472,6 +472,7 @@ public let DECL_NODES: [Node] = [
           .keyword(.transferring),
           .keyword(.unowned),
           .keyword(.weak),
+          .keyword(.sending),
         ])
       ),
       Child(

CodeGeneration/Sources/SyntaxSupport/ExperimentalFeatures.swift

@@ -19,6 +19,7 @@ public enum ExperimentalFeature: String, CaseIterable {
   case nonescapableTypes
   case transferringArgsAndResults
   case trailingComma
+  case sendingArgsAndResults
 
   /// The name of the feature, which is used in the doc comment.
   public var featureName: String {
@@ -35,6 +36,8 @@ public enum ExperimentalFeature: String, CaseIterable {
       return "TransferringArgsAndResults"
     case .trailingComma:
       return "trailing comma"
+    case .sendingArgsAndResults:
+      return "SendingArgsAndResults"
     }
   }
 

CodeGeneration/Sources/SyntaxSupport/KeywordSpec.swift

@@ -263,6 +263,7 @@ public enum Keyword: CaseIterable {
   case safe
   case scoped
   case `self`
+  case sending
   case `Self`
   case Sendable
   case set
@@ -701,6 +702,11 @@ public enum Keyword: CaseIterable {
         "transferring",
         experimentalFeature: .transferringArgsAndResults
       )
+    case .sending:
+      return KeywordSpec(
+        "sending",
+        experimentalFeature: .sendingArgsAndResults
+      )
     case .transpose:
       return KeywordSpec("transpose")
     case .true:

CodeGeneration/Sources/SyntaxSupport/TypeNodes.swift

@@ -593,6 +593,7 @@ public let TYPE_NODES: [Node] = [
           .keyword(.consuming),
           .keyword(.transferring),
           .keyword(._resultDependsOn),
+          .keyword(.sending),
         ]),
         documentation: "The specifier token that's attached to the type."
       )

Sources/SwiftParser/Declarations.swift

@@ -23,7 +23,7 @@ extension DeclarationModifier {
       .borrowing, .class, .consuming, .convenience, .distributed, .dynamic,
       .final, .indirect, .infix, .isolated, .lazy, .mutating, .nonmutating,
       .optional, .override, .postfix, .prefix, .reasync, ._resultDependsOn, ._resultDependsOnSelf, .required,
-      .rethrows, .static, .weak, .transferring:
+      .rethrows, .static, .weak, .transferring, .sending:
       return false
     case .fileprivate, .internal, .nonisolated, .package, .open, .private,
       .public, .unowned:

Sources/SwiftParser/Patterns.swift

@@ -378,6 +378,7 @@ extension Parser.Lookahead {
         && !self.at(.keyword(.borrowing))
         && !self.at(.keyword(.consuming))
         && !(experimentalFeatures.contains(.transferringArgsAndResults) && self.at(.keyword(.transferring)))
+        && !(experimentalFeatures.contains(.sendingArgsAndResults) && self.at(.keyword(.sending)))
         && !(experimentalFeatures.contains(.nonescapableTypes) && self.at(.keyword(._resultDependsOn)))
       {
         return true

Sources/SwiftParser/TokenPrecedence.swift

@@ -237,7 +237,7 @@ enum TokenPrecedence: Comparable {
       .__setter_access, .indirect, .isolated, .nonisolated, .distributed, ._local,
       .inout, ._mutating, ._borrow, ._borrowing, .borrowing, ._consuming, .consuming, .consume, ._resultDependsOnSelf,
       ._resultDependsOn,
-      .transferring, .dependsOn, .scoped,
+      .transferring, .dependsOn, .scoped, .sending,
       // Accessors
       .get, .set, .didSet, .willSet, .unsafeAddress, .addressWithOwner, .addressWithNativeOwner, .unsafeMutableAddress,
       .mutableAddressWithOwner, .mutableAddressWithNativeOwner, ._read, ._modify,

Sources/SwiftParser/TokenSpecSet.swift

@@ -377,6 +377,7 @@ enum DeclarationModifier: TokenSpecSet {
   case reasync
   case required
   case `rethrows`
+  case sending
   case `static`
   case transferring
   case unowned
@@ -420,6 +421,7 @@ enum DeclarationModifier: TokenSpecSet {
     case TokenSpec(.rethrows): self = .rethrows
     case TokenSpec(.static): self = .static
     case TokenSpec(.transferring): self = .transferring
+    case TokenSpec(.sending): self = .sending
     case TokenSpec(.unowned): self = .unowned
     case TokenSpec(.weak): self = .weak
     case TokenSpec(._resultDependsOn) where experimentalFeatures.contains(.nonescapableTypes): self = ._resultDependsOn
@@ -465,6 +467,7 @@ enum DeclarationModifier: TokenSpecSet {
     case .rethrows: return TokenSpec(.rethrows, recoveryPrecedence: .declKeyword)
     case .static: return .keyword(.static)
     case .transferring: return .keyword(.transferring)
+    case .sending: return .keyword(.sending)
     case .unowned: return TokenSpec(.unowned, recoveryPrecedence: .declKeyword)
     case .weak: return TokenSpec(.weak, recoveryPrecedence: .declKeyword)
     case ._resultDependsOn: return TokenSpec(._resultDependsOn, recoveryPrecedence: .declKeyword)

Sources/SwiftParser/generated/ExperimentalFeatures.swift

@@ -41,4 +41,7 @@ extension Parser.ExperimentalFeatures {
 
   /// Whether to enable the parsing of trailing comma.
   public static let trailingComma = Self (rawValue: 1 << 5)
+
+  /// Whether to enable the parsing of SendingArgsAndResults.
+  public static let sendingArgsAndResults = Self (rawValue: 1 << 6)
 }

Sources/SwiftParser/generated/Parser+TokenSpecSet.swift

@@ -814,6 +814,10 @@ extension DeclModifierSyntax {
     case transferring
     case unowned
     case weak
+    #if compiler(>=5.8)
+    @_spi(ExperimentalLanguageFeatures)
+    #endif
+    case sending
 
     init?(lexeme: Lexer.Lexeme, experimentalFeatures: Parser.ExperimentalFeatures) {
       switch PrepareForKeywordMatch(lexeme) {
@@ -891,6 +895,8 @@ extension DeclModifierSyntax {
         self = .unowned
       case TokenSpec(.weak):
         self = .weak
+      case TokenSpec(.sending) where experimentalFeatures.contains(.sendingArgsAndResults):
+        self = .sending
       default:
         return nil
       }
@@ -972,6 +978,8 @@ extension DeclModifierSyntax {
         self = .unowned
       case TokenSpec(.weak):
         self = .weak
+      case TokenSpec(.sending):
+        self = .sending
       default:
         return nil
       }
@@ -1053,6 +1061,8 @@ extension DeclModifierSyntax {
         return .keyword(.unowned)
       case .weak:
         return .keyword(.weak)
+      case .sending:
+        return .keyword(.sending)
       }
     }
 
@@ -1136,6 +1146,8 @@ extension DeclModifierSyntax {
         return .keyword(.unowned)
       case .weak:
         return .keyword(.weak)
+      case .sending:
+        return .keyword(.sending)
       }
     }
   }
@@ -3347,6 +3359,10 @@ extension SimpleTypeSpecifierSyntax {
     @_spi(ExperimentalLanguageFeatures)
     #endif
     case _resultDependsOn
+    #if compiler(>=5.8)
+    @_spi(ExperimentalLanguageFeatures)
+    #endif
+    case sending
 
     init?(lexeme: Lexer.Lexeme, experimentalFeatures: Parser.ExperimentalFeatures) {
       switch PrepareForKeywordMatch(lexeme) {
@@ -3368,6 +3384,8 @@ extension SimpleTypeSpecifierSyntax {
         self = .transferring
       case TokenSpec(._resultDependsOn) where experimentalFeatures.contains(.nonescapableTypes):
         self = ._resultDependsOn
+      case TokenSpec(.sending) where experimentalFeatures.contains(.sendingArgsAndResults):
+        self = .sending
       default:
         return nil
       }
@@ -3393,6 +3411,8 @@ extension SimpleTypeSpecifierSyntax {
         self = .transferring
       case TokenSpec(._resultDependsOn):
         self = ._resultDependsOn
+      case TokenSpec(.sending):
+        self = .sending
       default:
         return nil
       }
@@ -3418,6 +3438,8 @@ extension SimpleTypeSpecifierSyntax {
         return .keyword(.transferring)
       case ._resultDependsOn:
         return .keyword(._resultDependsOn)
+      case .sending:
+        return .keyword(.sending)
       }
     }
 
@@ -3445,6 +3467,8 @@ extension SimpleTypeSpecifierSyntax {
         return .keyword(.transferring)
       case ._resultDependsOn:
         return .keyword(._resultDependsOn)
+      case .sending:
+        return .keyword(.sending)
       }
     }
   }

Sources/SwiftSyntax/generated/Keyword.swift

@@ -211,6 +211,10 @@ public enum Keyword: UInt8, Hashable, Sendable {
   #endif
   case scoped
   case `self`
+  #if compiler(>=5.8)
+  @_spi(ExperimentalLanguageFeatures)
+  #endif
+  case sending
   case `Self`
   case Sendable
   case set
@@ -492,6 +496,8 @@ public enum Keyword: UInt8, Hashable, Sendable {
         self = .renamed
       case "reverse":
         self = .reverse
+      case "sending":
+        self = .sending
       case "unowned":
         self = .unowned
       case "willSet":
@@ -1002,6 +1008,7 @@ public enum Keyword: UInt8, Hashable, Sendable {
       "safe", 
       "scoped", 
       "self", 
+      "sending", 
       "Self", 
       "Sendable", 
       "set", 

Sources/SwiftSyntax/generated/raw/RawSyntaxValidation.swift

@@ -799,7 +799,8 @@ func validateLayout(layout: RawSyntaxBuffer, as kind: SyntaxKind) {
             .keyword("static"), 
             .keyword("transferring"), 
             .keyword("unowned"), 
-            .keyword("weak")
+            .keyword("weak"), 
+            .keyword("sending")
           ]))
     assertNoError(kind, 2, verify(layout[2], as: RawUnexpectedNodesSyntax?.self))
     assertNoError(kind, 3, verify(layout[3], as: RawDeclModifierDetailSyntax?.self))
@@ -2298,7 +2299,8 @@ func validateLayout(layout: RawSyntaxBuffer, as kind: SyntaxKind) {
             .keyword("borrowing"), 
             .keyword("consuming"), 
             .keyword("transferring"), 
-            .keyword("_resultDependsOn")
+            .keyword("_resultDependsOn"), 
+            .keyword("sending")
           ]))
     assertNoError(kind, 2, verify(layout[2], as: RawUnexpectedNodesSyntax?.self))
   case .someOrAnyType:

Sources/SwiftSyntax/generated/syntaxNodes/SyntaxNodesD.swift

@@ -169,7 +169,7 @@ public struct DeclModifierDetailSyntax: SyntaxProtocol, SyntaxHashable, _LeafSyn
 
 /// ### Children
 /// 
-///  - `name`: (`__consuming` | `__setter_access` | `_const` | `_local` | `actor` | `async` | `borrowing` | `class` | `consuming` | `convenience` | `distributed` | `dynamic` | `fileprivate` | `final` | `indirect` | `infix` | `internal` | `isolated` | `lazy` | `mutating` | `nonisolated` | `nonmutating` | `open` | `optional` | `override` | `package` | `postfix` | `prefix` | `private` | `public` | `reasync` | `_resultDependsOnSelf` | `required` | `static` | `transferring` | `unowned` | `weak`)
+///  - `name`: (`__consuming` | `__setter_access` | `_const` | `_local` | `actor` | `async` | `borrowing` | `class` | `consuming` | `convenience` | `distributed` | `dynamic` | `fileprivate` | `final` | `indirect` | `infix` | `internal` | `isolated` | `lazy` | `mutating` | `nonisolated` | `nonmutating` | `open` | `optional` | `override` | `package` | `postfix` | `prefix` | `private` | `public` | `reasync` | `_resultDependsOnSelf` | `required` | `static` | `transferring` | `unowned` | `weak` | `sending`)
 ///  - `detail`: ``DeclModifierDetailSyntax``?
 ///
 /// ### Contained in
@@ -276,6 +276,7 @@ public struct DeclModifierSyntax: SyntaxProtocol, SyntaxHashable, _LeafSyntaxNod
   ///  - `transferring`
   ///  - `unowned`
   ///  - `weak`
+  ///  - `sending`
   public var name: TokenSyntax {
     get {
       return Syntax(self).child(at: 1)!.cast(TokenSyntax.self)

Sources/SwiftSyntax/generated/syntaxNodes/SyntaxNodesQRS.swift

@@ -1090,7 +1090,7 @@ public struct SimpleStringLiteralExprSyntax: ExprSyntaxProtocol, SyntaxHashable,
 ///
 /// ### Children
 /// 
-///  - `specifier`: (`inout` | `__shared` | `__owned` | `isolated` | `_const` | `borrowing` | `consuming` | `transferring` | `_resultDependsOn`)
+///  - `specifier`: (`inout` | `__shared` | `__owned` | `isolated` | `_const` | `borrowing` | `consuming` | `transferring` | `_resultDependsOn` | `sending`)
 ///
 /// ### Contained in
 /// 
@@ -1156,6 +1156,7 @@ public struct SimpleTypeSpecifierSyntax: SyntaxProtocol, SyntaxHashable, _LeafSy
   ///  - `consuming`
   ///  - `transferring`
   ///  - `_resultDependsOn`
+  ///  - `sending`
   public var specifier: TokenSyntax {
     get {
       return Syntax(self).child(at: 1)!.cast(TokenSyntax.self)

Tests/SwiftParserTest/DeclarationTests.swift

@@ -3309,6 +3309,21 @@ final class DeclarationTests: ParserTestCase {
     )
   }
 
+  func testSendingTypeSpecifier() {
+    assertParse(
+      "func testVarDeclTupleElt() -> (sending String, String) {}",
+      experimentalFeatures: .sendingArgsAndResults
+    )
+    assertParse(
+      "func testVarDeclTuple2(_ x: (sending String)) {}",
+      experimentalFeatures: .sendingArgsAndResults
+    )
+    assertParse(
+      "func testVarDeclTuple2(_ x: (sending String, String)) {}",
+      experimentalFeatures: .sendingArgsAndResults
+    )
+  }
+
   func testMisplacedAttributeInVarDeclWithMultipleBindings() {
     assertParse(
       """