capture groups are in wrong order

[ColinEberhardt]

For the rather complex regex "^((?:[+-]\\d{6}|\\d{4}))(?:-(\\d{2})-(\\d{2})|(\\d{2})(\\d{2}))(?:(?:T|\\s+)(\\d{2})(?::(\\d{2})(?::(\\d{2})(?:[.,](\\d{1,9}))?)?|(\\d{2})(?:(\\d{2})(?:[.,](\\d{1,9}))?)?)?)?(?:([zZ])|(?:([+-])([01][0-9]|2[0-3])(?::?([0-5][0-9])(?::?([0-5][0-9])(?:[.,](\\d{1,9}))?)?)?)?)(?:\\[((?:(?:\\.\\.[-A-Za-z._]{1,12}|\\.[-A-Za-z_][-A-Za-z._]{0,12}|_[-A-Za-z._]{0,13}|[a-zA-Z](?:[A-Za-z._][-A-Za-z._]{0,12})?|[a-zA-Z]-(?:[-._][-A-Za-z._]{0,11})?|[a-zA-Z]-[a-zA-Z](?:[-._][-A-Za-z._]{0,10})?|[a-zA-Z]-[a-zA-Z][a-zA-Z](?:[A-Za-z._][-A-Za-z._]{0,9})?|[a-zA-Z]-[a-zA-Z][a-zA-Z]-(?:[-._][-A-Za-z._]{0,8})?|[a-zA-Z]-[a-zA-Z][a-zA-Z]-[a-zA-Z](?:[-._][-A-Za-z._]{0,7})?|[a-zA-Z]-[a-zA-Z][a-zA-Z]-[a-zA-Z][a-zA-Z](?:[-._][-A-Za-z._]{0,6})?)(?:\\/(?:\\.[-A-Za-z_]|\\.\\.[-A-Za-z._]{1,12}|\\.[-A-Za-z_][-A-Za-z._]{0,12}|[A-Za-z_][-A-Za-z._]{0,13}))*|Etc\\/GMT[-+]\\d{1,2}|(?:[+\\u2212-][0-2][0-9](?::?[0-5][0-9](?::?[0-5][0-9](?:[.,]\\d{1,9})?)?)?)))\\])?(?:\\[u-ca-((?:[A-Za-z0-9]{3,8}(?:-[A-Za-z0-9]{3,8})*))\\])?$", the JS implementation when matching the string 19761118 yields the following result:

'[
  "19761118",
  "1976",
  null,
  null,
  "11",
  "18",
  null,
  null,
  null,
  null,
  null,
  null,
  null,
  null,
  null,
  null,
  null,
  null,
  null,
  null,
  null
]'

The AS implementation yields the following:

  "matches": [
    "19761118",
    "1976",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "",
    "11",
    "18"
  ]

i.e. groups 4 & 5 are now at the end

[ashutoshvarma]

Another exmaple,

Regex - ^(\\d{2})(?::(\\d{2})(?::(\\d{2})(?:[.,](\\d{1,9}))?)?|(\\d{2})(?:(\\d{2})(?:[.,](\\d{1,9}))?)?)?(?:(?:([zZ])|(?:([+\u2212-])([01][0-9]|2[0-3])(?::?([0-5][0-9])(?::?([0-5][0-9])(?:[.,](\\d{1,9}))?)?)?)?)(?:\\[((?:(?:\\.[-A-Za-z_]|\\.\\.[-A-Za-z._]{1,12}|\\.[-A-Za-z_][-A-Za-z._]{0,12}|[A-Za-z_][-A-Za-z._]{0,13})(?:\\/(?:\\.[-A-Za-z_]|\\.\\.[-A-Za-z._]{1,12}|\\.[-A-Za-z_][-A-Za-z._]{0,12}|[A-Za-z_][-A-Za-z._]{0,13}))*|Etc\\/GMT[-+]\\d{1,2}|(?:[+\\u2212-][0-2][0-9](?::?[0-5][0-9](?::?[0-5][0-9](?:[.,]\\d{1,9})?)?)?)))\\])?)?(?:\\[u-ca=((?:[A-Za-z0-9]{3,8}(?:-[A-Za-z0-9]{3,8})*))\\])?$

JS Result :-

  [
      "152343.121212121",
      "15",
      "23",
      "43",
      "121212121"
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null
    ]

AS Result ;-

  [
      "152343.121212121",
      "15",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "23",
      "43",
      "121212121"
    ]

Group 2,3,4 are now at the end.

[ColinEberhardt]

Thanks @ashutoshvarma I'll investigate this issue shortly.

I'm still super pleased that this regex engine can handle such complex expressions! 😀

[ashutoshvarma]

@ColinEberhardt Many thanks for bringing complete regex support to AS ecosystem!

Here is another example, (while porting test cases for PlainTime I am finding many such cases )

It looks like extension of OP example,
Regex (Same as OP post, the PlainDateTIme one) - "^((?:[+-]\\d{6}|\\d{4}))(?:-(\\d{2})-(\\d{2})|(\\d{2})(\\d{2}))(?:(?:T|\\s+)(\\d{2})(?::(\\d{2})(?::(\\d{2})(?:[.,](\\d{1,9}))?)?|(\\d{2})(?:(\\d{2})(?:[.,](\\d{1,9}))?)?)?)?(?:([zZ])|(?:([+-])([01][0-9]|2[0-3])(?::?([0-5][0-9])(?::?([0-5][0-9])(?:[.,](\\d{1,9}))?)?)?)?)(?:\\[((?:(?:\\.\\.[-A-Za-z._]{1,12}|\\.[-A-Za-z_][-A-Za-z._]{0,12}|_[-A-Za-z._]{0,13}|[a-zA-Z](?:[A-Za-z._][-A-Za-z._]{0,12})?|[a-zA-Z]-(?:[-._][-A-Za-z._]{0,11})?|[a-zA-Z]-[a-zA-Z](?:[-._][-A-Za-z._]{0,10})?|[a-zA-Z]-[a-zA-Z][a-zA-Z](?:[A-Za-z._][-A-Za-z._]{0,9})?|[a-zA-Z]-[a-zA-Z][a-zA-Z]-(?:[-._][-A-Za-z._]{0,8})?|[a-zA-Z]-[a-zA-Z][a-zA-Z]-[a-zA-Z](?:[-._][-A-Za-z._]{0,7})?|[a-zA-Z]-[a-zA-Z][a-zA-Z]-[a-zA-Z][a-zA-Z](?:[-._][-A-Za-z._]{0,6})?)(?:\\/(?:\\.[-A-Za-z_]|\\.\\.[-A-Za-z._]{1,12}|\\.[-A-Za-z_][-A-Za-z._]{0,12}|[A-Za-z_][-A-Za-z._]{0,13}))*|Etc\\/GMT[-+]\\d{1,2}|(?:[+\\u2212-][0-2][0-9](?::?[0-5][0-9](?::?[0-5][0-9](?:[.,]\\d{1,9})?)?)?)))\\])?(?:\\[u-ca-((?:[A-Za-z0-9]{3,8}(?:-[A-Za-z0-9]{3,8})*))\\])?$"

JS -

[
    "+0019761118T152330.1+0000",
    "+001976",
    null,
    null,
    "11",
    "18", 
    "15",
    null,
    null,
    null,
    "23", 
    "30",
    "1",
    null,
    "+",
    "00",
    "00",
    null,
    null,
    null,
    null
]

AS-

[
    "+0019761118T152330.1+0000",
    "+001976",
    "",
    "",
    "15",
    "",
    "",
    "",
    "",
    "",
    "",
    "+",
    "00",
    "00",
    "",
    "",
    "23",
    "30",
    "1",
    "11",
    "18"
]