stri_match_all,
stri_match_first, or stri_match_last,
depending on the argument used.
Note that this is slower than the direct call.stri_match(str, ..., regex, mode = c("first", "all", "last"))stri_match_all_regex,
  stri_match_first_regex,
  stri_match_first_regex,
  stri_match_last_regex,
  stri_match_last_regex;
  stri_match_all;
  stri_match_first;
  stri_match_last;
  stringi-search