Compiling REx `[[<{(]'
size 12 Got 100 bytes for offset annotations.
first at 1
   1: ANYOF[(<[{](12)
  12: END(0)
stclass `ANYOF[(<[{]' minlen 1 
Offsets: [12]
        1[6] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 7[0] 
Compiling REx `[]>})]'
size 12 Got 100 bytes for offset annotations.
first at 1
   1: ANYOF[)>\]}](12)
  12: END(0)
stclass `ANYOF[)>\]}]' minlen 1 
Offsets: [12]
1[6] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 7[0] 
Compiling REx `(?x)
       (?<=((?-xism:[]>})])))
       ((?-xism:[[<{(]))
       (?{print qq{Match @{ [++ $count] }: on left $1, on right $2\n}})
   '
size 37 Got 300 bytes for offset annotations.
first at 1
synthetic stclass `ANYOF[(<[{]'.
   1: IFMATCH[-1](20)
   3:   OPEN1(5)
   5:     ANYOF[)>\]}](16)
  16:   CLOSE1(18)
  18:   SUCCEED(0)
  19:   TAIL(20)
  20: OPEN2(22)
  22:   ANYOF[(<[{](33)
  33: CLOSE2(35)
  35: EVAL(37)
  37: END(0)
stclass `ANYOF[(<[{]' minlen 1 with eval 
Offsets: [37]
        17[17] 0[0] 17[1] 0[0] 26[6] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 33[1] 0[0] 33[0] 33[0] 43[1] 0[0] 52[6] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 0[0] 59[1] 0[0] 68[68] 0[0] 136[0] 
 String: <x1>[x2]{x3}(x4)
----------------------------------------
Matching REx `(?x)
       (?<=((?-xism:[]>})])))
       ((?-xism:[[<{(]))
       (?{print qq{Match @{ [++ $count] }: on left $1, on right $2\n}})
   ...' against `<x1>[x2]{x3}(x4)'
Matching stclass `ANYOF[(<[{]' against `<x1>[x2]{x3}(x4)'
  Setting an EVAL scope, savestack=25
   0 <> <<x1>[x2]{x3}>    |  1:  IFMATCH[-1]
                            failed...
  Setting an EVAL scope, savestack=25
   4 <<x1>> <[x2]{x3}>    |  1:  IFMATCH[-1]
   3 <<x1> <>[x2]{x3}>    |  3:    OPEN1
   3 <<x1> <>[x2]{x3}>    |  5:    ANYOF[)>\]}]
   4 <<x1>> <[x2]{x3}>    | 16:    CLOSE1
   4 <<x1>> <[x2]{x3}>    | 18:    SUCCEED
                              could match...
   4 <<x1>> <[x2]{x3}>    | 20:  OPEN2
   4 <<x1>> <[x2]{x3}>    | 22:  ANYOF[(<[{]
   5 <<x1>[> <x2]{x3}>    | 33:  CLOSE2
   5 <<x1>[> <x2]{x3}>    | 35:  EVAL
  re_eval 0x63a28
Match 1: on left >, on right [
   5 <<x1>[> <x2]{x3}>    | 37:  END
Match successful!
Matching REx `(?x)
       (?<=((?-xism:[]>})])))
       ((?-xism:[[<{(]))
       (?{print qq{Match @{ [++ $count] }: on left $1, on right $2\n}})
   ...' against `x2]{x3}(x4)'
...