Add a test suite for Expression

This also makes the first parameter of `Expression::execute()` optional
from C++. Previously, it was only optional in the scripting API.

1 files changed, 1 insertions, 1 deletions

diff --git a/core/math/expression.h b/core/math/expression.h
index 59a9a2f4ed..f2cfe6b1a6 100644
--- a/core/math/expression.h
+++ b/core/math/expression.h
@@ -343,7 +343,7 @@ protected:
 
 public:
 	Error parse(const String &p_expression, const Vector<String> &p_input_names = Vector<String>());
-	Variant execute(Array p_inputs, Object *p_base = nullptr, bool p_show_error = true);
+	Variant execute(Array p_inputs = Array(), Object *p_base = nullptr, bool p_show_error = true);
 	bool has_execute_failed() const;
 	String get_error_text() const;