Refactor Object metadata

* API kept the same (Although functions could be renamed to set_metadata/get_metadata in a later PR), so not much should change.
* Metadata now exposed as individual properties.
* Properties are editable in inspector (unless metadata name begins with _) under the metadata/ namespace.
* Added the ability to Add/Remove metadata properties to the inspector.

This is a functionality that was requested very often, that makes metadata work a bit more similar to custom properties in Blender.

1 files changed, 2 insertions, 4 deletions

diff --git a/core/variant/variant_construct.h b/core/variant/variant_construct.h
index 6027cb027e..ce2e9af04f 100644
--- a/core/variant/variant_construct.h
+++ b/core/variant/variant_construct.h
@@ -543,14 +543,12 @@ public:
 class VariantConstructNoArgsObject {
 public:
 	static void construct(Variant &r_ret, const Variant **p_args, Callable::CallError &r_error) {
-		VariantInternal::clear(&r_ret);
-		VariantInternal::object_assign_null(&r_ret);
+		r_ret = (Object *)nullptr; // Must construct a TYPE_OBJECT containing nullptr.
 		r_error.error = Callable::CallError::CALL_OK;
 	}
 
 	static inline void validated_construct(Variant *r_ret, const Variant **p_args) {
-		VariantInternal::clear(r_ret);
-		VariantInternal::object_assign_null(r_ret);
+		*r_ret = (Object *)nullptr; // Must construct a TYPE_OBJECT containing nullptr.
 	}
 	static void ptr_construct(void *base, const void **p_args) {
 		PtrConstruct<Object *>::construct(nullptr, base);