LispEngine.Lexing.Scanner.isExponent C# (CSharp) Method

        private bool isExponent() {
            return peek()== 'e';
        }

 private static TokenType?remainingFloat(Scanner s)
 {
     s.readChar(); // Skip the '.'
     while (s.isDigit() || s.isExponent())
     {
         if (s.isExponent())
         {
             return(readExponent(s));
         }
         s.readChar();
     }
     return(TokenType.Double);
 }