Checks that the number of capture groups in the regex matches the length of the key.
Checks that only certain values of key can appear more that once.
Adds names to keys that will be used for column names in the output of extract_taxonomy.
Uses non-standard evaluation to get the name of input variables.
validate_regex_key_pair(regex, key, multiple_allowed)(character)
A regex with capture groups
(character)
A key corresponding to regex
(character)
Values of key_options that can appear more than once.
Returns the result of match.arg on the key.