Merge pull request #28053 from lupoDharkael/shadowing

GDScript: add variable shadowing warning

1 files changed, 16 insertions, 0 deletions

diff --git a/modules/gdscript/gdscript_parser.cpp b/modules/gdscript/gdscript_parser.cpp
index 8a9eacd835..80af094c2c 100644
--- a/modules/gdscript/gdscript_parser.cpp
+++ b/modules/gdscript/gdscript_parser.cpp
@@ -7658,6 +7658,11 @@ void GDScriptParser::_check_function_types(FunctionNode *p_function) {
 		if (p_function->arguments_usage[i] == 0 && !p_function->arguments[i].operator String().begins_with("_")) {
 			_add_warning(GDScriptWarning::UNUSED_ARGUMENT, p_function->line, p_function->name, p_function->arguments[i].operator String());
 		}
+		for (int j = 0; j < current_class->variables.size(); j++) {
+			if (current_class->variables[j].identifier == p_function->arguments[i]) {
+				_add_warning(GDScriptWarning::SHADOWED_VARIABLE, p_function->line, p_function->arguments[i], itos(current_class->variables[j].line));
+			}
+		}
 #endif // DEBUG_ENABLED
 	}
 
@@ -7731,6 +7736,17 @@ void GDScriptParser::_check_function_types(FunctionNode *p_function) {
 		p_function->return_type.has_type = false;
 		p_function->return_type.may_yield = true;
 	}
+
+#ifdef DEBUG_ENABLED
+	for (Map<StringName, LocalVarNode *>::Element *E = p_function->body->variables.front(); E; E = E->next()) {
+		LocalVarNode *lv = E->get();
+		for (int i = 0; i < current_class->variables.size(); i++) {
+			if (current_class->variables[i].identifier == lv->name) {
+				_add_warning(GDScriptWarning::SHADOWED_VARIABLE, lv->line, lv->name, itos(current_class->variables[i].line));
+			}
+		}
+	}
+#endif // DEBUG_ENABLED
 }
 
 void GDScriptParser::_check_class_blocks_types(ClassNode *p_class) {