add create functions

src/run.go

@@ -2,17 +2,44 @@ package main
 
 // returns (number|string|nil), error
 func runVal(line any, stack stack) (any, ArErr) {
+	if len(stack) > 500 {
+		return nil, ArErr{
+			TYPE:    "Stack overflow",
+			message: "the stack has exceeded 500 levels",
+			EXISTS:  true,
+		}
+	}
 	switch x := line.(type) {
-	case translateNumber:
-		return (x.number), ArErr{}
-	case translateString:
-		return (x.str), ArErr{}
+	case number:
+		return x, ArErr{}
+	case string:
+		return x, ArErr{}
 	case call:
 		return runCall(x, stack)
 	case accessVariable:
 		return readVariable(x, stack)
 	case ArMapGet:
 		return mapGet(x, stack)
+	case ArClass:
+		return x.MAP, ArErr{}
+	case setVariable:
+		return setVariableValue(x, stack)
+	case negative:
+		resp, err := runVal(x.VAL, stack)
+		if err.EXISTS {
+			return nil, err
+		}
+		switch y := resp.(type) {
+		case number:
+			return newNumber().Neg(y), ArErr{}
+		}
+		return nil, ArErr{
+			TYPE:    "TypeError",
+			message: "cannot negate a non-number",
+			EXISTS:  true,
+		}
+	case brackets:
+		return runVal(x.VAL, stack)
 	}
 	panic("unreachable")
 }