Regex Replace does not use captured groups

[sweBers]

 * Xed version 3.4.5
 * Distribution - Linux Mint 21.3 Cinnamon

Issue
Regex replace does not use captured groups ()

Steps to reproduce
Select Search and replace from the menu with multiline text
Search for a regex pattern with a subgroup i.e abc(123) with the text aabc1234
Attempt to use the captured pattern with the variable $1 in the replace

Expected behaviour
The variable $1 will be expressed as the captured text 123
Instead, the replacement text will feature $1 as the literal replacement text

Other information

[zpangwin]

Capture groups work, but for back-references, Xed uses \1 etc instead of $1 (this is also common in many terminal apps like sed). Disclaimer: Though I don't believe there should be any difference, I am testing from Fedora Cinnamon instead of on Mint. I am using Xed 3.4.5

Examples (with ".*" regex button enabled obviously):

text content:

quick red fox jumped over fence

search pattern:

(quick|fence)

replace pattern:

the \1

text after hitting 'replace all' button:

the quick red fox jumped over the fence

OR

text content:

the quick red fox jumped over the fence and fell flat on its face

search pattern using capture group + back reference

(the) quick.*\1 fence

will correctly highlight as follows:

the quick red fox jumped over the fence

---

Possibly the ticket could be changed to "Request Xed support both \1 and $1 style backreferences" when using capture groups (similar to perl / prename and some other apps).

That would probably avoid confusion for people who are only familiar with the Perl/Java/JavaScript variants of Regex (which are actually a lot more common these days) while not really disrupting folks used to the Posix-style back references much except possibly forcing them to escape dollar signs in the replace expression.

Or alternately, could possibly be user-configurable which style back-references Xed should use.