Anchors                 The start or end of a string
Backreferences          Backreferences
CharacterClasses        Class Constants
ClassGroups             Character classes
Concatenation           Combine strings together
DateTime                Date-time regexes
IsoClasses              ISO 8601 date-time classes
SpecialCharacters       Special characters
Unicode                 Unicode classes
WordBoundaries          Word boundaries
as.regex                Convert or test for regex objects
capture                 Capture a token, or not
char_class              A range or char_class of characters
escape_special          Escape special characters
exactly                 Make a regex exact
format.regex            Print or format regex objects
get_weekdays            Get the days of the week or months of the year
literal                 Treat part of a regular expression literally
lookahead               Lookaround
modify_mode             Apply mode modifiers
number_range            Generate a regular expression for a number
                        range
or                      Alternation
rebus                   rebus: Regular Expression Builder, Um,
                        Something
recursive               Make the regular expression recursive.
regex                   Create a regex
repeated                Repeat values
roman                   Roman numerals
