public bool IsOperator(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
throw new ArgumentNullException();
}
return(!IsOperand(input) && OperatorDenotations.Contains(input));
}
public bool IsOperand(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
throw new ArgumentNullException();
}
var isEscaped = input.StartsWith(OpenEscapeOperator.MainDenotation, StringComparison.Ordinal) &&
input.EndsWith(CloseEscapeOperator.MainDenotation, StringComparison.Ordinal);
var isInOperatorsDenotations = OperatorDenotations.Contains(input);
return(isEscaped || !isInOperatorsDenotations);
}
