Properly report Callable bound arguments

Fixes #63213
Adds a function: Callable::get_amount_of_arguments_bound() to query this in callables. Exposed to the engine API.

1 files changed, 12 insertions, 0 deletions

diff --git a/core/variant/callable.cpp b/core/variant/callable.cpp
index ba3fc536d7..849bfaa38f 100644
--- a/core/variant/callable.cpp
+++ b/core/variant/callable.cpp
@@ -137,6 +137,14 @@ StringName Callable::get_method() const {
 	return method;
 }
 
+int Callable::get_bound_arguments_count() const {
+	if (!is_null() && is_custom()) {
+		return custom->get_bound_arguments_count();
+	} else {
+		return 0;
+	}
+}
+
 CallableCustom *Callable::get_custom() const {
 	ERR_FAIL_COND_V_MSG(!is_custom(), nullptr,
 			vformat("Can't get custom on non-CallableCustom \"%s\".", operator String()));
@@ -344,6 +352,10 @@ const Callable *CallableCustom::get_base_comparator() const {
 	return nullptr;
 }
 
+int CallableCustom::get_bound_arguments_count() const {
+	return 0;
+}
+
 CallableCustom::CallableCustom() {
 	ref_count.init();
 }