Update for Swift 6

Author: sdidla

Package.resolved

@@ -6,8 +6,8 @@
         "repositoryURL": "https://github.com/apple/swift-syntax.git",
         "state": {
           "branch": null,
-          "revision": "08a2f0a9a30e0f705f79c9cfaca1f68b71bdc775",
-          "version": "510.0.0"
+          "revision": "0687f71944021d616d34d922343dcef086855920",
+          "version": "600.0.1"
         }
       }
     ]

Package.swift

@@ -18,7 +18,7 @@ let package = Package(
         .library(name: "Hatch", targets: ["Hatch"]),
     ],
     dependencies: [
-        .package(name: "swift-syntax", url: "https://github.com/apple/swift-syntax.git", from: "510.0.0")
+        .package(name: "swift-syntax", url: "https://github.com/apple/swift-syntax.git", from: "600.0.0")
     ],
     targets: [
         .executableTarget(name: "HatchExample", dependencies: [.target(name: "Hatch")]),

Sources/Hatch/StringBuilder.swift

@@ -22,7 +22,7 @@ import Foundation
 ///
 /// try myFile.write(toFile: "myFile.swift", atomically: true, encoding: .utf8)
 /// ```
-@resultBuilder public struct StringBuilder {
+@resultBuilder public struct StringBuilder: Sendable {
     static public func buildBlock(_ components: String?...) -> String? {
         return components.compactMap { $0 }.joined(separator: "\n")
     }

Sources/Hatch/Symbol.swift

@@ -3,12 +3,12 @@ import Foundation
 // MARK: - Symbol Protocol
 
 /// Represents a Swift type or symbol
-public protocol Symbol {
+public protocol Symbol: Sendable {
     var children: [Symbol] { get }
 }
 
 /// Represent a Swift type that can inherit from or conform to other types
-public protocol InheritingSymbol {
+public protocol InheritingSymbol: Sendable {
     var name: String { get }
     var inheritedTypes: [String] { get }
 }
@@ -18,60 +18,60 @@ public protocol InheritingSymbol {
 /// A swift protocol
 public typealias ProtocolType = Protocol
 
-public struct Protocol: Symbol, InheritingSymbol  {
+public struct Protocol: Symbol, InheritingSymbol, Sendable  {
     public let name: String
     public let children: [Symbol]
     public let inheritedTypes: [String]
 }
 
 /// A swift class
-public struct Class: Symbol, InheritingSymbol  {
+public struct Class: Symbol, InheritingSymbol, Sendable  {
     public let name: String
     public let children: [Symbol]
     public let inheritedTypes: [String]
 }
 
 /// A swift actor
-public struct Actor: Symbol, InheritingSymbol  {
+public struct Actor: Symbol, InheritingSymbol, Sendable  {
     public let name: String
     public let children: [Symbol]
     public let inheritedTypes: [String]
 }
 
 /// A swift struct
-public struct Struct: Symbol, InheritingSymbol  {
+public struct Struct: Symbol, InheritingSymbol, Sendable  {
     public let name: String
     public let children: [Symbol]
     public let inheritedTypes: [String]
 }
 
 /// A swift enum
-public struct Enum: Symbol, InheritingSymbol  {
+public struct Enum: Symbol, InheritingSymbol, Sendable  {
     public let name: String
     public let children: [Symbol]
     public let inheritedTypes: [String]
 }
 
 /// A single case of a swift enum
-public struct EnumCase: Symbol  {
+public struct EnumCase: Symbol, Sendable  {
     public let children: [Symbol]
 }
 
 /// A single element of a swift enum case
-public struct EnumCaseElement: Symbol  {
+public struct EnumCaseElement: Symbol, Sendable  {
     public let name: String
     public let children: [Symbol]
 }
 
 /// A swift typealias to an existing type
-public struct Typealias: Symbol  {
+public struct Typealias: Symbol, Sendable  {
     public let name: String
     public let existingType: String
     public let children: [Symbol] = []
 }
 
 /// A swift extension
-public struct Extension: Symbol, InheritingSymbol  {
+public struct Extension: Symbol, InheritingSymbol, Sendable  {
     public let name: String
     public let children: [Symbol]
     public let inheritedTypes: [String]