Update and commit even though the tests fail.

Package.resolved

@@ -1,14 +1,15 @@
 {
+  "originHash" : "99d91c19240d69188427b3369e2f8d6c77ff744ee6fe9da52573b26817d1b336",
   "pins" : [
     {
       "identity" : "swift-syntax",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/apple/swift-syntax.git",
       "state" : {
-        "revision" : "64889f0c732f210a935a0ad7cda38f77f876262d",
-        "version" : "509.1.1"
+        "revision" : "4c6cc0a3b9e8f14b3ae2307c5ccae4de6167ac2c",
+        "version" : "600.0.0-prerelease-2024-06-12"
       }
     }
   ],
-  "version" : 2
+  "version" : 3
 }

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version: 5.9
+// swift-tools-version: 6.0
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
@@ -22,7 +22,7 @@ let package = Package(
         // Depend on the Swift 5.9 release of SwiftSyntax
         .package(
             url: "https://github.com/apple/swift-syntax.git",
-            from: "509.0.0"
+            from: "600.0.0-latest"
         ),
     ],
     targets: [

Sources/DiscriminatedUnion/DiscriminatedUnion.swift

@@ -4,7 +4,7 @@
     names: named(Discriminant), named(discriminant)
 )
 @attached(extension, conformances: DiscriminatedUnion)
-public macro DiscriminatedUnion() = #externalMacro(
+public macro discriminatedUnion() = #externalMacro(
     module: "DiscriminatedUnionMacros",
     type: "DiscriminatedUnionMacro")
 

Sources/DiscriminatedUnionClient/main.swift

@@ -1,7 +1,7 @@
 import DiscriminatedUnion
 
 
-@DiscriminatedUnion
+@discriminatedUnion
 enum Pet {
     case dog
     case cat(curious: Bool)

Sources/DiscriminatedUnionMacros/CaseMacroDiagnostic.swift

@@ -21,7 +21,7 @@ enum CaseMacroDiagnostic {
         switch self {
         case .notAnEnum(let decl):
             // TODO:
-          return "'@DiscriminatedUnion' can only be attached to an enum, not \(decl.descriptiveDeclKind(withArticle: true))"
+          return "'@discriminatedUnion' can only be attached to an enum, not \(decl.descriptiveDeclKind(withArticle: true))"
         }
       }
 

Tests/DiscriminatedUnionTests/DiscriminatedUnionTests.swift

@@ -1,8 +1,9 @@
+import SwiftSyntax
+import SwiftSyntaxBuilder
 import SwiftSyntaxMacros
 import SwiftSyntaxMacrosTestSupport
 import XCTest
 
-
 // Macro implementations build for the host, so the corresponding module is not available when cross-compiling. Cross-compiled tests may still make use of the macro itself in end-to-end tests.
 #if canImport(DiscriminatedUnionMacros)
 import DiscriminatedUnionMacros
@@ -16,30 +17,58 @@ final class DiscriminatedUnionTests: XCTestCase {
 #if canImport(DiscriminatedUnionMacros)
         assertMacroExpansion(
             """
-            @DiscriminatedUnion
+            @discriminatedUnion
             enum Pet {
               case dog
               case cat(curious: Bool)
               case parrot
               case snake
             }
             """,
-            expandedSource: """
-            @DiscriminatedUnion
-            enum Pet {
-              case dog
-              case cat(curious: Bool)
-              case parrot
-              case snake
 
-              enum Discriminant: Hashable {
-                case dog
-                case cat
-                case parrot
-                case snake
-              }
-            }
-            """,
+            expandedSource: 
+"""
+enum Pet {
+  case dog
+  case cat(curious: Bool)
+  case parrot
+  case snake
+
+    public enum Discriminant: DiscriminantType {
+      case dog
+      case cat
+      case parrot
+      case snake
+
+    public var hasAssociatedType: Bool {
+      switch self {
+      case .dog:
+          false // nil
+      case .cat:
+          true // Optional("curious: Bool")
+      case .parrot:
+          false // nil
+      case .snake:
+          false // nil
+      }
+    }
+  }
+
+  public var discriminant: Discriminant {
+    switch self {
+    case .dog:
+      return .dog
+    case .cat:
+      return .cat
+    case .parrot:
+      return .parrot
+    case .snake:
+      return .snake
+    }
+  }
+}
+
+""",
             macros: testMacros
         )
 #else