1  >var i = 0;

    ~~~~~~~~~~~                                   => Pos: (0 to 10)  SpanInfo: {"start":0,"length":9}
    >var i = 0
    >:=> (line 1, col 0) to (line 1, col 9)
--------------------------------
2  >do

    ~~~                                           => Pos: (11 to 13)  SpanInfo: {"start":20,"length":3}
    >i++
    >:=> (line 4, col 4) to (line 4, col 7)
--------------------------------
3  >{

    ~~                                            => Pos: (14 to 15)  SpanInfo: {"start":20,"length":3}
    >i++
    >:=> (line 4, col 4) to (line 4, col 7)
--------------------------------
4  >    i++;

    ~~~~~~~~~                                     => Pos: (16 to 24)  SpanInfo: {"start":20,"length":3}
    >i++
    >:=> (line 4, col 4) to (line 4, col 7)
--------------------------------
5  >} while (i < 10);

    ~                                             => Pos: (25 to 25)  SpanInfo: {"start":20,"length":3}
    >i++
    >:=> (line 4, col 4) to (line 4, col 7)
5  >} while (i < 10);

     ~~~~~~~~~~~~~~~~~                            => Pos: (26 to 42)  SpanInfo: {"start":27,"length":14}
    >while (i < 10)
    >:=> (line 5, col 2) to (line 5, col 16)
--------------------------------
6  >do {

    ~~~~~                                         => Pos: (43 to 47)  SpanInfo: {"start":52,"length":3}
    >i++
    >:=> (line 7, col 4) to (line 7, col 7)
--------------------------------
7  >    i++;

    ~~~~~~~~~                                     => Pos: (48 to 56)  SpanInfo: {"start":52,"length":3}
    >i++
    >:=> (line 7, col 4) to (line 7, col 7)
--------------------------------
8  >} while (i < 20);

    ~                                             => Pos: (57 to 57)  SpanInfo: {"start":52,"length":3}
    >i++
    >:=> (line 7, col 4) to (line 7, col 7)
8  >} while (i < 20);

     ~~~~~~~~~~~~~~~~~                            => Pos: (58 to 74)  SpanInfo: {"start":59,"length":14}
    >while (i < 20)
    >:=> (line 8, col 2) to (line 8, col 16)
--------------------------------
9  >do {

    ~~~~~                                         => Pos: (75 to 79)  SpanInfo: {"start":84,"length":3}
    >i++
    >:=> (line 10, col 4) to (line 10, col 7)
--------------------------------
10 >    i++;

    ~~~~~~~~~                                     => Pos: (80 to 88)  SpanInfo: {"start":84,"length":3}
    >i++
    >:=> (line 10, col 4) to (line 10, col 7)
--------------------------------
11 >} 

    ~~~                                           => Pos: (89 to 91)  SpanInfo: {"start":84,"length":3}
    >i++
    >:=> (line 10, col 4) to (line 10, col 7)
--------------------------------
12 >while (i < 30);

    ~~~~~~~~~~~~~~~~                              => Pos: (92 to 107)  SpanInfo: {"start":92,"length":14}
    >while (i < 30)
    >:=> (line 12, col 0) to (line 12, col 14)
--------------------------------
13 >do {

    ~~~~~                                         => Pos: (108 to 112)  SpanInfo: {"start":117,"length":3}
    >i--
    >:=> (line 14, col 4) to (line 14, col 7)
--------------------------------
14 >    i--;

    ~~~~~~~~~                                     => Pos: (113 to 121)  SpanInfo: {"start":117,"length":3}
    >i--
    >:=> (line 14, col 4) to (line 14, col 7)
--------------------------------
15 >} while ((function () {

    ~                                             => Pos: (122 to 122)  SpanInfo: {"start":117,"length":3}
    >i--
    >:=> (line 14, col 4) to (line 14, col 7)
15 >} while ((function () {

     ~~~~~~~~                                     => Pos: (123 to 130)  SpanInfo: {"start":124,"length":60}
    >while ((function () {
    >        return 30 * i;
    >    })() !== i)
    >:=> (line 15, col 2) to (line 17, col 15)
15 >} while ((function () {

             ~                                    => Pos: (131 to 131)  SpanInfo: {"start":131,"length":46}
    >(function () {
    >        return 30 * i;
    >    })()
    >:=> (line 15, col 9) to (line 17, col 8)
15 >} while ((function () {

              ~~~~~~~~~~~~~~                      => Pos: (132 to 145)  SpanInfo: {"start":154,"length":13}
    >return 30 * i
    >:=> (line 16, col 8) to (line 16, col 21)
--------------------------------
16 >        return 30 * i;

    ~~~~~~~~~~~~~~~~~~~~~~~                       => Pos: (146 to 168)  SpanInfo: {"start":154,"length":13}
    >return 30 * i
    >:=> (line 16, col 8) to (line 16, col 21)
--------------------------------
17 >    })() !== i); 
    ~~~~~                                         => Pos: (169 to 173)  SpanInfo: {"start":173,"length":1}
    >}
    >:=> (line 17, col 4) to (line 17, col 5)
17 >    })() !== i); 
         ~~~                                      => Pos: (174 to 176)  SpanInfo: {"start":131,"length":46}
    >(function () {
    >        return 30 * i;
    >    })()
    >:=> (line 15, col 9) to (line 17, col 8)
17 >    })() !== i); 
            ~~~~~~~~~                             => Pos: (177 to 185)  SpanInfo: {"start":124,"length":60}
    >while ((function () {
    >        return 30 * i;
    >    })() !== i)
    >:=> (line 15, col 2) to (line 17, col 15)