// Recursively call the lower arithmetic stage until a primitive
private Func <AbstractExpressionNode> ArithmeticOperation(ArithmeticLevel level)
{
return(() =>
{
if (level == ArithmeticLevel.Primitive)
{
return ArithmeticPrimitive();
}
return ExecuteIfOperator
(
ArithmeticOperation(level - 1)(),
ArithmeticOperation(level),
GetOperators(level)
);
});
}
// Retrieve the operators that belong to the arithmetic level
private IEnumerable <OperatorType> GetOperators(ArithmeticLevel level)
{
switch (level)
{
case ArithmeticLevel.Powerable:
yield return(OperatorType.Pow);
break;
case ArithmeticLevel.Divisible:
yield return(OperatorType.Div);
yield return(OperatorType.EuclidianDiv);
break;
case ArithmeticLevel.Multiplicative:
yield return(OperatorType.Mod);
yield return(OperatorType.Mul);
break;
case ArithmeticLevel.Additive:
yield return(OperatorType.Add);
yield return(OperatorType.Sub);
break;
case ArithmeticLevel.BitwiseAnd:
yield return(OperatorType.BitwiseAnd);
break;
case ArithmeticLevel.BitwiseOr:
yield return(OperatorType.BitwiseOr);
break;
case ArithmeticLevel.Comparative:
yield return(OperatorType.Equals);
yield return(OperatorType.NotEquals);
yield return(OperatorType.Greater);
yield return(OperatorType.NotGreater);
yield return(OperatorType.Less);
yield return(OperatorType.NotLess);
break;
case ArithmeticLevel.LogicalAnd:
yield return(OperatorType.AndAlso);
break;
case ArithmeticLevel.LogicalOr:
yield return(OperatorType.OrElse);
break;
}
}
