1  >var x = 10;

    ~~~~~~~~~~~~                                  => Pos: (0 to 11)  SpanInfo: {"start":0,"length":10}
    >var x = 10
    >:=> (line 1, col 0) to (line 1, col 10)
--------------------------------
2  >var y = 20;

    ~~~~~~~~~~~~                                  => Pos: (12 to 23)  SpanInfo: {"start":12,"length":10}
    >var y = 20
    >:=> (line 2, col 0) to (line 2, col 10)
--------------------------------
3  >x++;

    ~~~~~                                         => Pos: (24 to 28)  SpanInfo: {"start":24,"length":3}
    >x++
    >:=> (line 3, col 0) to (line 3, col 3)
--------------------------------
4  >y--;

    ~~~~~                                         => Pos: (29 to 33)  SpanInfo: {"start":29,"length":3}
    >y--
    >:=> (line 4, col 0) to (line 4, col 3)
--------------------------------
5  >typeof (function foo() {

    ~~~~~~                                        => Pos: (34 to 39)  SpanInfo: {"start":34,"length":43}
    >typeof (function foo() {
    >    return y;
    >})()
    >:=> (line 5, col 0) to (line 7, col 4)
5  >typeof (function foo() {

          ~~                                      => Pos: (40 to 41)  SpanInfo: {"start":41,"length":36}
    >(function foo() {
    >    return y;
    >})()
    >:=> (line 5, col 7) to (line 7, col 4)
5  >typeof (function foo() {

            ~~~~~~~~~~~~~~~~~                     => Pos: (42 to 58)  SpanInfo: {"start":63,"length":8}
    >return y
    >:=> (line 6, col 4) to (line 6, col 12)
--------------------------------
6  >    return y;

    ~~~~~~~~~~~~~~                                => Pos: (59 to 72)  SpanInfo: {"start":63,"length":8}
    >return y
    >:=> (line 6, col 4) to (line 6, col 12)
--------------------------------
7  >})();

    ~                                             => Pos: (73 to 73)  SpanInfo: {"start":73,"length":1}
    >}
    >:=> (line 7, col 0) to (line 7, col 1)
7  >})();

     ~~~~~                                        => Pos: (74 to 78)  SpanInfo: {"start":41,"length":36}
    >(function foo() {
    >    return y;
    >})()
    >:=> (line 5, col 7) to (line 7, col 4)
--------------------------------
8  >++x;

    ~~~~~                                         => Pos: (79 to 83)  SpanInfo: {"start":79,"length":3}
    >++x
    >:=> (line 8, col 0) to (line 8, col 3)
--------------------------------
9  >++y;
    ~~~~                                          => Pos: (84 to 87)  SpanInfo: {"start":84,"length":3}
    >++y
    >:=> (line 9, col 0) to (line 9, col 3)