public static bool IsArithmetic(this BinaryOperatorKind op)
{
switch (op)
{
case BinaryOperatorKind.Multiply:
case BinaryOperatorKind.Divide:
case BinaryOperatorKind.Modulo:
case BinaryOperatorKind.Add:
case BinaryOperatorKind.Subtract:
return true;
default:
return false;
}
}