Code Inspection: Anonymous capturing group or numeric back reference
Reports anonymous capturing groups and numeric back references in a RegExp.These are only reported when the RegExp dialect supports named group and named group references.Named groups and named back references improve code readability and are recommended to use instead.When a capture is not needed, matching can be more performant and use less memory by using a non-capturing group,i.e. (?:xxx) instead of (xxx).
New in 2017.2