Function reference • RVerbalExpressions

Utilities
`sanitize()`	Escape characters expected special by regex engines
Rules
`any()`	Match any of these characters exactly once (alias of `any_of()`).
`any_of()`	Match any of these characters exactly once.
`anything()`	Match any character(s) any (including zero) number of times.
`anything_but()`	Match any character(s) except these any (including zero) number of times.
`end_of_line()`	Match the expression only if it appears till the end of the line.
`find()`	Match an expression (alias for `then()`).
`maybe()`	Optionally match an expression.
`range()`	Match any character within the range defined by the parameters.
`something()`	Match any character(s) at least once.
`something_but()`	Match any character(s) except these at least once.
`start_of_line()`	Match the expression only if it appears from beginning of line.
`then()`	Match an expression
Loops
`one_or_more()`	Match the previous stuff one or more times.
Special Characters
`br()`	Match a line break (alias of `line_break()`).
`digit()`	Match a digit (0–9).
`line_break()`	Match a line break.
`tab()`	Match a tab character.
`whitespace()`	Match a whitespace character.
`word()`	Match a word.
Capture Groups
`begin_capture()`	Begin a capture group.
`end_capture()`	End a capture group.
Modifiers
`with_any_case()`	Control case-insensitive matching.

Reference