The high-level intermediate representation for a group.
This represents one of three possible group types:
- A non-capturing group (e.g.,
- A capturing group (e.g.,
- A named capturing group (e.g.,
The kind of this group. If it is a capturing group, then the kind contains the capture group index (and the name, if it is a named group).
The expression inside the capturing group, which may be empty.
othervalues to be equal, and is used by