rescapeGroup function

String rescapeGroup(String group)

Escapes a group to ensure it remains a capturing group.

This prevents turning the group into a non-capturing group (?:...), a lookahead (?=...), or a negative lookahead (?!...). Allowing these patterns would break the assumption used to map parameter names to match groups.

Implementation

String rescapeGroup(String group) =>
    group.replaceFirstMapped(_groupRegExp, _escape);