()</b> or <b>pcre_dfa_exec()</b>
  \Cdd       call pcre_copy_substring() for substring dd after a successful match (number less than 32)
  \Cname     call pcre_copy_named_substring() for substring "name" after a successful match (name termin-
               ated by next non alphanumeric character)
  \C+        show the current captured substrings at callout time
  \C-        do not supply a callout function
  \C!n       return 1 instead of 0 when callout number n is reached
  \C!n!m     return 1 instead of 