%if_next_is% lookarounds %if_next_isnt% lookarounds %if_prev_is% lookarounds %if_prev_isnt% lookarounds %or% or . capture : character_class any_of character_class as.character.regex regex as.regex as.regex as.regex.default as.regex at_least counts at_most counts between counts capture capture capture_group capture character_class character_class character_class_escape character_class_escape character_class_escape.character character_class_escape character_class_escape.character_class character_class_escape character_class_escape.default character_class_escape character_class_escape.list character_class_escape character_class_escape.regex character_class_escape counts counts escape escape escape.character escape escape.character_class escape escape.default escape escape.list escape escape.regex escape except character_class except_any_of character_class except_some_of character_class exclude_range character_class group group lookarounds lookarounds m re_matches matches re_matches maybe wildcards n counts none_of character_class not not n_times counts one_of character_class one_or_more wildcards or or print.regex regex range character_class regex regex register_shortcuts register_shortcuts rex rex rex_ rex rex_mode rex_mode re_matches re_matches re_substitutes re_substitutes s re_substitutes shortcuts shortcuts single_shortcuts single_shortcuts some_of character_class substitutes re_substitutes wildcards wildcards zero_or_more wildcards zero_or_one wildcards