/// <summary>
        /// Consume a JSON numeric token
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="throws"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeNumber(
            this JsonParserContext ctx,
            bool throws
            )
        {
            const string Leading = "-0123456789";
            const string Allowed = Leading + ".Ee+";

            if (ctx.ConsumeWhiteSpace().ConsumeAnyChar(Leading, throws).IsSucceeded)
            {
                JSonReader src = ctx.Begin();

                for (int p = src.Position, len = src.Text.Length; p < len; p++)
                {
                    if (Allowed.IndexOf(src.Text[p]) < 0)
                    {
                        ctx.SetResult(
                            new JValue {
                            BoxedValue = double.Parse(src.Text.Substring(src.Position - 1, p - src.Position + 1))
                        }
                            );

                        src.Position = p;
                        break;
                    }
                }
            }

            return(ctx);
        }
        /// <summary>
        /// Consume a JSON array
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="throws"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeArray(
            this JsonParserContext ctx,
            bool throws
            )
        {
            if (ctx.ConsumeWhiteSpace().ConsumeAnyChar("[", throws).IsSucceeded)
            {
                var  jctr        = new JArray();
                bool shouldThrow = false;

                do
                {
                    ctx.Begin();
                    if (ctx.ConsumeValue(shouldThrow).IsSucceeded)
                    {
                        jctr.Add((JToken)ctx.Result);
                    }
                    shouldThrow = true;
                }while ((char)ctx.ConsumeWhiteSpace().ConsumeAnyChar(",]", true).Result == ',');

                ctx.SetResult(jctr);
            }

            return(ctx);
        }
        /// <summary>
        /// Consume a JSON object
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="throws"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeObject(
            this JsonParserContext ctx,
            bool throws
            )
        {
            if (ctx.ConsumeWhiteSpace().ConsumeAnyChar("{", throws).IsSucceeded)
            {
                var  jctr        = new JObject();
                bool shouldThrow = false;

                do
                {
                    ctx.Begin();
                    if (ctx.ConsumeString(shouldThrow).IsSucceeded)
                    {
                        var name = (string)(JValue)ctx.Result;
                        ctx.ConsumeWhiteSpace()
                        .ConsumeAnyChar(":", true)
                        .ConsumeValue(true);

                        jctr.Add(name, (JToken)ctx.Result);
                    }

                    shouldThrow = true;
                }while ((char)ctx.ConsumeWhiteSpace().ConsumeAnyChar(",}", true).Result == ',');

                ctx.SetResult(jctr);
            }

            return(ctx);
        }
        /// <summary>
        /// Consume all the characters in the specified sequence
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="sequence"></param>
        /// <param name="throws"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeAllChars(
            this JsonParserContext ctx,
            string sequence,
            bool throws
            )
        {
            JSonReader src = ctx.Begin();

            for (int q = 0, p = src.Position; q < sequence.Length; q++, p++)
            {
                if (src.Text[p] != sequence[q])
                {
                    if (throws)
                    {
                        throw new JsonParseException("Expected char not found.");
                    }

                    return(ctx);
                }
            }

            src.Position += sequence.Length;
            ctx.SetResult(sequence);
            return(ctx);
        }
 /// <summary>
 /// Consume any suitable JSON value token
 /// </summary>
 /// <param name="ctx"></param>
 /// <param name="throws"></param>
 /// <returns></returns>
 private static JsonParserContext ConsumeValue(
     this JsonParserContext ctx,
     bool throws
     )
 {
     return(ctx.First(
                throws,
                JsonHelpers.ConsumeString,
                JsonHelpers.ConsumeNumber,
                JsonHelpers.ConsumeObject,
                JsonHelpers.ConsumeArray,
                JsonHelpers.ConsumeBoolean,
                JsonHelpers.ConsumeNull
                ));
 }
        /// <summary>
        /// Consume an arbitrary number of whitespace characters
        /// </summary>
        /// <param name="ctx"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeWhiteSpace(
            this JsonParserContext ctx
            )
        {
            JSonReader src = ctx.Begin();

            for (int p = src.Position, len = src.Text.Length; p < len; p++)
            {
                if (WhiteSpace.IndexOf(src.Text[p]) < 0)
                {
                    src.Position = p;
                    break;
                }
            }

            return(ctx);
        }
        /// <summary>
        /// Consume the JSON "null" token
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="throws"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeNull(
            this JsonParserContext ctx,
            bool throws
            )
        {
            if (ctx.ConsumeWhiteSpace().ConsumeAnyChar("n", throws).IsSucceeded)
            {
                ctx.ConsumeAllChars("ull", true);
                ctx.SetResult(
                    new JValue {
                    BoxedValue = null
                }
                    );
            }

            return(ctx);
        }
        /// <summary>
        /// Consume a JSON boolean token
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="throws"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeBoolean(
            this JsonParserContext ctx,
            bool throws
            )
        {
            if (ctx.ConsumeWhiteSpace().ConsumeAnyChar("ft", throws).IsSucceeded)
            {
                bool flag = (char)ctx.Result == 't';
                ctx.ConsumeAllChars(flag ? "rue" : "alse", true);
                ctx.SetResult(
                    new JValue {
                    BoxedValue = flag
                }
                    );
            }

            return(ctx);
        }
        /// <summary>
        /// Parse a JSON-string to a specific DOM
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        public static JToken Parse(string text)
        {
#if NETF
            CultureInfo culture = (CultureInfo)CultureInfo.CurrentCulture.Clone();

            culture.DateTimeFormat.DateSeparator    = "-";
            culture.DateTimeFormat.ShortDatePattern = "yyyy-MM-dd";

            culture.NumberFormat.NumberDecimalSeparator = ".";
            Thread.CurrentThread.CurrentCulture         = culture;
            Thread.CurrentThread.CurrentUICulture       = culture;
#endif
            var rd  = new JSonReader(text);
            var ctx = new JsonParserContext(rd)
                      .ConsumeWhiteSpace()
                      .First(true, JsonHelpers.ConsumeObject, JsonHelpers.ConsumeArray);

            return((JToken)ctx.Result);
        }
        /// <summary>
        /// Consume a JSON string token
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="throws"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeString(
            this JsonParserContext ctx,
            bool throws
            )
        {
            if (ctx.ConsumeWhiteSpace().ConsumeAnyChar("\"", throws).IsSucceeded)
            {
                JSonReader src = ctx.Begin();

                for (int p = src.Position, len = src.Text.Length; p < len; p++)
                {
                    if ((src.Text[p]) == '"' && (p > 0 ? (src.Text[p - 1]) != '\\' : true))
                    {
                        string temp = src.Text.Substring(src.Position, p - src.Position);

                        int index = 0;

                        while (index < temp.Length)
                        {
                            if (temp[index] == '\\')
                            {
                                temp = temp.Substring(0, index) + temp.Substring(index + 1, temp.Length - (index + 1));
                            }
                            index++;
                        }

                        ctx.SetResult(
                            new JValue {
                            BoxedValue = temp
                        }
                            );

                        src.Position = p + 1;
                        break;
                    }
                }
            }

            return(ctx);
        }
        /// <summary>
        /// Consume any character (at least one) in the specified set
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="charset"></param>
        /// <param name="throws"></param>
        /// <returns></returns>
        private static JsonParserContext ConsumeAnyChar(
            this JsonParserContext ctx,
            string charset,
            bool throws
            )
        {
            JSonReader src = ctx.Begin();

            char c;

            if (charset.IndexOf(c = src.Text[src.Position]) >= 0)
            {
                src.Position++;
                ctx.SetResult(c);
            }
            else if (throws)
            {
                throw new JsonParseException("Expected char not found.");
            }

            return(ctx);
        }
        /// <summary>
        /// Yield the consumption of the current context to a series of possible parsers
        /// The control will pass to the first one able to manage the source.
        /// </summary>
        /// <param name="ctx"></param>
        /// <param name="throws"></param>
        /// <param name="funcs"></param>
        /// <returns></returns>
        private static JsonParserContext First(
            this JsonParserContext ctx,
            bool throws,
            params JsonParseDelegate[] funcs
            )
        {
            for (int i = 0; i < funcs.Length; i++)
            {
                if (funcs[i](ctx, false).IsSucceeded)
                {
                    return(ctx);
                }
            }

            if (throws)
            {
                throw new JsonParseException("Unmatched handler for context.");
            }
            else
            {
                return(ctx);
            }
        }