override public (string, object) Evaluate(SymbolTable symbolTable)
{
(string, object)ret1 = children[0].Evaluate(symbolTable);
(string, object)ret2 = children[1].Evaluate(symbolTable);
switch (value.ToString())
{
case "+":
God.VerifyType("integer", ret1);
God.VerifyType("integer", ret2);
return("integer", ((int)ret1.Item2 + (int)ret2.Item2));
case "-":
God.VerifyType("integer", ret1);
God.VerifyType("integer", ret2);
return("integer", ((int)ret1.Item2 - (int)ret2.Item2));
case "*":
God.VerifyType("integer", ret1);
God.VerifyType("integer", ret2);
return("integer", ((int)ret1.Item2 * (int)ret2.Item2));
case "/":
God.VerifyType("integer", ret1);
God.VerifyType("integer", ret2);
return("integer", ((int)ret1.Item2 / (int)ret2.Item2));
case "=":
(string, object)val = ret2;
symbolTable.Set((string)children[0].value, val.Item2, val.Item1);
return("none", null);
case ">":
God.VerifyType("integer", ret1);
God.VerifyType("integer", ret2);
return("boolean", ((int)ret1.Item2 > (int)ret2.Item2));
case "<":
God.VerifyType("integer", ret1);
God.VerifyType("integer", ret2);
return("boolean", ((int)ret1.Item2 < (int)ret2.Item2));
case "&":
God.VerifyType("boolean", ret1);
God.VerifyType("boolean", ret2);
return("boolean", ((bool)ret1.Item2 && (bool)ret2.Item2));
case "|":
God.VerifyType("boolean", ret1);
God.VerifyType("boolean", ret2);
return("boolean", ((bool)ret1.Item2 || (bool)ret2.Item2));
case "==":
if (ret1.Item1 != ret2.Item1)
{
throw new SystemException($"Invalid relative operation == between variables of types {ret1.Item1} and {ret2.Item1}.");
}
switch (ret1.Item1)
{
case "boolean":
return("boolean", (bool)ret1.Item2 == (bool)ret2.Item2);
case "integer":
return("boolean", (int)ret1.Item2 == (int)ret2.Item2);
default:
throw new SystemException($"Invalid variable type for == operation. {ret1.Item1}.");
}
case "vardec":
//get value of type node and interact with ident node to sabe the var type
string type = (string)children[1].value;
string key = (string)children[0].value;
symbolTable.Set(key, null, type);
return("none", null);
default:
throw new SystemException($"Invalid Binary Operator ( {value} was received at node on integer operation )");
}
}