public IExpressionData Evaluate()
{
IExpressionData leftData = leftExpression.Evaluate();
IExpressionData rightData = rightExpression.Evaluate();
if (leftData.GetType() != rightData.GetType())
{
throw new Exception("Operation on different types");
}
if (leftData is DoubleType)
{
double left, right;
left = (double)leftData.GetData();
right = (double)rightData.GetData();
switch (Operation)
{
case '+': return(new DoubleType(left + right));
case '-': return(new DoubleType(left - right));
case '*': return(new DoubleType(left * right));
case '/': return(new DoubleType(left / right));
default: throw new Exception("Unknown operation");
}
}
else if (leftData is StringType)
{
if (Operation != '+')
{
throw new Exception("Unknown operation on string");
}
string left = (string)leftData.GetData();
string right = (string)rightData.GetData();
return(new StringType(left + right));
}
else if (leftData is BoolType)
{
throw new Exception("Cant use operator on boolen type");
}
else
{
throw new Exception("Not initialized data");
}
}
public IExpressionData Evaluate()
{
IExpressionData leftData = leftExpression.Evaluate();
IExpressionData rightData = rightExpression.Evaluate();
if (leftData.GetType() != rightData.GetType())
{
throw new Exception("Operation on different types");
}
if (Operation == "&" || Operation == "|")
{
if (leftData.GetType() != typeof(BoolType))
{
throw new Exception("Boolen operation on none boolen variable");
}
bool left = (bool)leftData.GetData();
bool right = (bool)rightData.GetData();
if (Operation == "&" && (left && right))
{
return(new BoolType(true));
}
else if (Operation == "|" && (left || right))
{
return(new BoolType(true));
}
else
{
return(new BoolType(false));
}
}
else if (Operation == ">" || Operation == "<" || Operation == "==" || Operation == "<=" || Operation == ">=" || Operation == "!=")
{
if (leftData.GetType() == typeof(BoolType))
{
throw new Exception("Not boolen operation on boolen type");
}
if (leftData.GetType() == typeof(StringType))
{
if (Operation == "==")
{
if ((string)leftData.GetData() == (string)rightData.GetData())
{
return(new BoolType(true));
}
else
{
return(new BoolType(false));
}
}
else if (Operation == "!=")
{
if ((string)leftData.GetData() != (string)rightData.GetData())
{
return(new BoolType(true));
}
else
{
return(new BoolType(false));
}
}
else
{
throw new Exception("Cant use this operation on string");
}
}
else if (leftData.GetType() == typeof(DoubleType))
{
double left = (double)leftData.GetData();
double right = (double)rightData.GetData();
bool result = false;
switch (Operation)
{
case ">": if (left > right)
{
result = true;
}
break;
case "<": if (left < right)
{
result = true;
}
break;
case ">=": if (left >= right)
{
result = true;
}
break;
case "<=": if (left <= right)
{
result = true;
}
break;
case "==": if (left == right)
{
result = true;
}
break;
case "!=": if (left != right)
{
result = true;
}
break;
}
return(new BoolType(result));
}
else
{
throw new Exception("Unknown data type");
}
}
else
{
throw new Exception("Unknown operation in Condition expression");
}
}