the GRegexMatchFlags to use when matching the regex
an integer associated with this expression, or -1 if gregex could not be transformed into a vte.Regex or gflags were incompatible
Deprecated: Use Terminal.matchAddRegex or Terminal.matchAddRegexFull instead.
Adds the regular expression regex to the list of matching expressions. When the user moves the mouse cursor over a section of displayed text which matches this expression, the text will be highlighted.