Merge pull request #43682 from RandomShaper/warn_reference_singleton

Warn about singleton being a Reference

1 files changed, 10 insertions, 0 deletions

diff --git a/core/config/engine.cpp b/core/config/engine.cpp
index b0037ffb37..8e2ab094b0 100644
--- a/core/config/engine.cpp
+++ b/core/config/engine.cpp
@@ -219,3 +219,13 @@ Engine *Engine::get_singleton() {
 Engine::Engine() {
 	singleton = this;
 }
+
+Engine::Singleton::Singleton(const StringName &p_name, Object *p_ptr) :
+		name(p_name),
+		ptr(p_ptr) {
+#ifdef DEBUG_ENABLED
+	if (Object::cast_to<Reference>(p_ptr)) {
+		ERR_PRINT("A class intended to be used as a singleton must *not* inherit from Reference.");
+	}
+#endif
+}