尝试UTF32String

src/Evaluator/Core/EvalUnary.cpp

@@ -39,7 +39,7 @@ namespace Fig
                 return tryInvokeOverloadFn(value, [value]() { return std::make_shared<Object>(bit_not(*value)); });
             }
             default: {
-                throw EvaluatorError(u8"UnsupportedOpError",
+                throw EvaluatorError(U"UnsupportedOpError",
                                      std::format("Unsupported op '{}' for unary expression", magic_enum::enum_name(op)),
                                      un);
             }