Replacing with backreference in TextMate issue

Question

I am using TextMate to replace expression [my_expression] consisting in characters between open and closed brackets by {my_expression}; so I tried to r

Answer 1

Use a capturing group (...):

\[([^\]]*)\]

The $1 is a backreference to the text enclosed with [...].

Here is the regex demo and also Numbered Backreferences.

Also, the TextMate docs:

1. Syntax elements
  (...) group

20.4.1 Captures
To reference a capture, use $n where n is the capture register number. Using $0 means the entire match.

And also:

• If you want to use [, -, ] as a normal character in a character class, you should escape these characters by \.