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internal sealed partial class JsonStringRunner : FAStringRunner {
        private FAMatch NextMatchImpl(string s) {
            int ch;
            int len;
            int p;
            int l;
            int c;
            ch = -1;
            len = 0;
            if ((this.position == -1)) {
                this.position = 0;
            }
            p = this.position;
            l = this.line;
            c = this.column;
            this.Advance(s, ref ch, ref len, true);
            // q0:
            // [\t-\n\r ]
            if (((((ch >= 9) 
                        && (ch <= 10)) 
                        || (ch == 13)) 
                        || (ch == 32))) {
                this.Advance(s, ref ch, ref len, false);
                goto q1;
            }
            // [\"]
            if ((ch == 34)) {
                this.Advance(s, ref ch, ref len, false);
                goto q2;
            }
            // [,]
            if ((ch == 44)) {
                this.Advance(s, ref ch, ref len, false);
                goto q9;
            }
            // [\-]
            if ((ch == 45)) {
                this.Advance(s, ref ch, ref len, false);
                goto q10;
            }
            // [0]
            if ((ch == 48)) {
                this.Advance(s, ref ch, ref len, false);
                goto q11;
            }
            // [1-9]
            if (((ch >= 49) 
                        && (ch <= 57))) {
                this.Advance(s, ref ch, ref len, false);
                goto q17;
            }
            // [\:]
            if ((ch == 58)) {
                this.Advance(s, ref ch, ref len, false);
                goto q18;
            }
            // [\[]
            if ((ch == 91)) {
                this.Advance(s, ref ch, ref len, false);
                goto q19;
            }
            // [\]]
            if ((ch == 93)) {
                this.Advance(s, ref ch, ref len, false);
                goto q20;
            }
            // [f]
            if ((ch == 102)) {
                this.Advance(s, ref ch, ref len, false);
                goto q21;
            }
            // [n]
            if ((ch == 110)) {
                this.Advance(s, ref ch, ref len, false);
                goto q26;
            }
            // [t]
            if ((ch == 116)) {
                this.Advance(s, ref ch, ref len, false);
                goto q30;
            }
            // [\{]
            if ((ch == 123)) {
                this.Advance(s, ref ch, ref len, false);
                goto q32;
            }
            // [\}]
            if ((ch == 125)) {
                this.Advance(s, ref ch, ref len, false);
                goto q33;
            }
            goto errorout;
        q1:
            // [\t-\n\r ]
            if (((((ch >= 9) 
                        && (ch <= 10)) 
                        || (ch == 13)) 
                        || (ch == 32))) {
                this.Advance(s, ref ch, ref len, false);
                goto q1;
            }
            return FAMatch.Create(10, s.Substring(p, len), p, l, c);
        q2:
            // [\0-\t\v-!#-\[\]-\x10ffff]
            if ((((((ch >= 0) 
                        && (ch <= 9)) 
                        || ((ch >= 11) 
                        && (ch <= 33))) 
                        || ((ch >= 35) 
                        && (ch <= 91))) 
                        || ((ch >= 93) 
                        && (ch <= 1114111)))) {
                this.Advance(s, ref ch, ref len, false);
                goto q2;
            }
            // [\"]
            if ((ch == 34)) {
                this.Advance(s, ref ch, ref len, false);
                goto q3;
            }
            // [\\]
            if ((ch == 92)) {
                this.Advance(s, ref ch, ref len, false);
                goto q4;
            }
            goto errorout;
        q3:
            return FAMatch.Create(9, s.Substring(p, len), p, l, c);
        q4:
            // [\"\/\\bfnrt]
            if (((((((((ch == 34) 
                        || (ch == 47)) 
                        || (ch == 92)) 
                        || (ch == 98)) 
                        || (ch == 102)) 
                        || (ch == 110)) 
                        || (ch == 114)) 
                        || (ch == 116))) {
                this.Advance(s, ref ch, ref len, false);
                goto q2;
            }
            // [u]
            if ((ch == 117)) {
                this.Advance(s, ref ch, ref len, false);
                goto q5;
            }
            goto errorout;
        q5:
            // [0-9A-Fa-f]
            if (((((ch >= 48) 
                        && (ch <= 57)) 
                        || ((ch >= 65) 
                        && (ch <= 70))) 
                        || ((ch >= 97) 
                        && (ch <= 102)))) {
                this.Advance(s, ref ch, ref len, false);
                goto q6;
            }
            goto errorout;
        q6:
            // [0-9A-Fa-f]
            if (((((ch >= 48) 
                        && (ch <= 57)) 
                        || ((ch >= 65) 
                        && (ch <= 70))) 
                        || ((ch >= 97) 
                        && (ch <= 102)))) {
                this.Advance(s, ref ch, ref len, false);
                goto q7;
            }
            goto errorout;

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