From 0010eca0c6c1602627a245b6803fa22430675363 Mon Sep 17 00:00:00 2001
From: Hossein Yousefi <yousefi@google.com>
Date: Tue, 8 Oct 2024 13:15:33 +0200
Subject: [PATCH] Clone type usage

---
 .../lib/src/bindings/kotlin_processor.dart    |  2 +-
 pkgs/jnigen/lib/src/elements/elements.dart    | 24 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/pkgs/jnigen/lib/src/bindings/kotlin_processor.dart b/pkgs/jnigen/lib/src/bindings/kotlin_processor.dart
index b7d05f630..4980debf9 100644
--- a/pkgs/jnigen/lib/src/bindings/kotlin_processor.dart
+++ b/pkgs/jnigen/lib/src/bindings/kotlin_processor.dart
@@ -56,7 +56,7 @@ class _KotlinMethodProcessor extends Visitor<Method, void> {
       final continuationType = node.params.last.type.type as DeclaredType;
       node.asyncReturnType = continuationType.params.isEmpty
           ? TypeUsage.object
-          : continuationType.params.first;
+          : continuationType.params.first.clone();
     }
   }
 }
diff --git a/pkgs/jnigen/lib/src/elements/elements.dart b/pkgs/jnigen/lib/src/elements/elements.dart
index 449c12e15..324fdc2b1 100644
--- a/pkgs/jnigen/lib/src/elements/elements.dart
+++ b/pkgs/jnigen/lib/src/elements/elements.dart
@@ -253,6 +253,30 @@ class TypeUsage {
   R accept<R>(TypeVisitor<R> v) {
     return type.accept(v);
   }
+
+  TypeUsage clone() {
+    final ReferredType clonedType;
+    final clonedTypeJson = typeJson.map(MapEntry.new);
+    switch (kind) {
+      case Kind.primitive:
+        clonedType = PrimitiveType.fromJson(clonedTypeJson);
+        break;
+      case Kind.typeVariable:
+        clonedType = TypeVar.fromJson(clonedTypeJson);
+        break;
+      case Kind.wildcard:
+        clonedType = Wildcard.fromJson(clonedTypeJson);
+        break;
+      case Kind.declared:
+        clonedType = DeclaredType.fromJson(clonedTypeJson);
+        break;
+      case Kind.array:
+        clonedType = ArrayType.fromJson(clonedTypeJson);
+        break;
+    }
+    return TypeUsage(shorthand: shorthand, kind: kind, typeJson: clonedTypeJson)
+      ..type = clonedType;
+  }
 }
 
 abstract class ReferredType {