BinaryFileSchemaParser.BinaryFileSchemaParser.hexbyte C# (CSharp) Метод

        public bool hexbyte()
        {
            return And(()=>
                     In('0','9', 'A','F', 'a','f')
                  && (
                         In('0','9', 'A','F', 'a','f')
                      || Fatal("Two hex chars required per byte.")) );
        }