see the &%allow_domain_literals%& main option.
.new
-The value for a match will be the &`@[]`& string.
+The value for a match will be the string &`@[]`&.
.wen
.new
The value for a match will be the list element string (starting with the asterisk).
+Additionally, &$0$& will be set to the matched string
+and &$1$& to the variable portion which the asterisk matched.
.wen
.next
.new
The value for a match will be the list element string (starting with the circumflex).
+Additionally, &$0$& will be set to the string matching the regular expression,
+and &$1$& (onwards) to any submatches identified by parentheses.
.wen