WIP

CodeGeneration/Package.swift

@@ -21,8 +21,8 @@ let package = Package(
     // checkout of swift-syntax that is unaffected by the newly generated files.
     // Be sure to revert the change before committing your changes.
     //
-    // .package(url: "https://github.com/apple/swift-syntax", branch: "main")
-    .package(path: "..")
+    .package(url: "https://github.com/apple/swift-syntax", branch: "main")
+    // .package(path: "..")
   ],
   targets: [
     .executableTarget(

Sources/SwiftSyntax/SyntaxArena.swift

@@ -163,12 +163,12 @@ public class SyntaxArena {
   func addChild(_ otherRef: SyntaxArenaRef) {
     if SyntaxArenaRef(self) == otherRef { return }
 
-    #if DEBUG || SWIFTSYNTAX_ENABLE_ASSERTIONS
-    precondition(
-      !self.hasParent,
-      "an arena can't have a new child once it's owned by other arenas"
-    )
-    #endif
+        #if DEBUG || SWIFTSYNTAX_ENABLE_ASSERTIONS
+        precondition(
+          !self.hasParent,
+          "an arena can't have a new child once it's owned by other arenas"
+        )
+        #endif
 
     if childRefs.insert(otherRef).inserted {
       otherRef.retain()

Sources/SwiftSyntax/generated/SyntaxRewriter.swift

@@ -1,4 +1,4 @@
-//// Automatically generated by generate-swiftsyntax
+//// Automatically generated by generate-swift-syntax
 //// Do not edit directly!
 //===----------------------------------------------------------------------===//
 //
@@ -1784,6 +1784,13 @@ open class SyntaxRewriter {
     return ExprSyntax(visitChildren(node))
   }
 
+  /// Visit a ``ThenStmtSyntax``.
+  ///   - Parameter node: the node that is being visited
+  ///   - Returns: the rewritten node
+  open func visit(_ node: ThenStmtSyntax) -> StmtSyntax {
+    return StmtSyntax(visitChildren(node))
+  }
+
   /// Visit a ``ThrowStmtSyntax``.
   ///   - Parameter node: the node that is being visited
   ///   - Returns: the rewritten node
@@ -3064,6 +3071,10 @@ open class SyntaxRewriter {
       return {
         self.visitImpl($0, TernaryExprSyntax.self, self.visit)
       }
+    case .thenStmt:
+      return {
+        self.visitImpl($0, ThenStmtSyntax.self, self.visit)
+      }
     case .throwStmt:
       return {
         self.visitImpl($0, ThrowStmtSyntax.self, self.visit)
@@ -3688,6 +3699,8 @@ open class SyntaxRewriter {
       return visitImpl(data, SwitchExprSyntax.self, visit)
     case .ternaryExpr:
       return visitImpl(data, TernaryExprSyntax.self, visit)
+    case .thenStmt:
+      return visitImpl(data, ThenStmtSyntax.self, visit)
     case .throwStmt:
       return visitImpl(data, ThrowStmtSyntax.self, visit)
     case .tryExpr: