Merge pull request #69416 from anvilfolk/default-val

Add GDScript implicit type conversion for member variables with initializers

modules/gdscript/gdscript.cpp

@@ -701,6 +701,7 @@ bool GDScript::_update_exports(bool *r_err, bool p_recursive_call, PlaceHolderSc
 						Variant default_value;
 						if (member.variable->initializer && member.variable->initializer->is_constant) {
 							default_value = member.variable->initializer->reduced_value;
+							GDScriptCompiler::convert_to_initializer_type(default_value, member.variable);
 						}
 						member_default_values_cache[member.variable->identifier->name] = default_value;
 					} break;

modules/gdscript/gdscript_compiler.cpp

@@ -2389,6 +2389,7 @@ Error GDScriptCompiler::_populate_class_members(GDScript *p_script, const GDScri
 #ifdef TOOLS_ENABLED
 				if (variable->initializer != nullptr && variable->initializer->is_constant) {
 					p_script->member_default_values[name] = variable->initializer->reduced_value;
+					GDScriptCompiler::convert_to_initializer_type(p_script->member_default_values[name], variable);
 				} else {
 					p_script->member_default_values.erase(name);
 				}
@@ -2646,6 +2647,20 @@ Error GDScriptCompiler::_compile_class(GDScript *p_script, const GDScriptParser:
 	return OK;
 }
 
+void GDScriptCompiler::convert_to_initializer_type(Variant &p_variant, const GDScriptParser::VariableNode *p_node) {
+	// Set p_variant to the value of p_node's initializer, with the type of p_node's variable.
+	GDScriptParser::DataType member_t = p_node->datatype;
+	GDScriptParser::DataType init_t = p_node->initializer->datatype;
+	if (member_t.is_hard_type() && init_t.is_hard_type() &&
+			member_t.kind == GDScriptParser::DataType::BUILTIN && init_t.kind == GDScriptParser::DataType::BUILTIN) {
+		if (Variant::can_convert_strict(init_t.builtin_type, member_t.builtin_type)) {
+			Variant *v = &p_node->initializer->reduced_value;
+			Callable::CallError ce;
+			Variant::construct(member_t.builtin_type, p_variant, const_cast<const Variant **>(&v), 1, ce);
+		}
+	}
+}
+
 void GDScriptCompiler::make_scripts(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
 	p_script->fully_qualified_name = p_class->fqcn;
 	p_script->name = p_class->identifier ? p_class->identifier->name : "";

modules/gdscript/gdscript_compiler.h

@@ -140,6 +140,7 @@ class GDScriptCompiler {
 	bool within_await = false;
 
 public:
+	static void convert_to_initializer_type(Variant &p_variant, const GDScriptParser::VariableNode *p_node);
 	static void make_scripts(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state);
 	Error compile(const GDScriptParser *p_parser, GDScript *p_script, bool p_keep_state = false);