Reference

Constructor

rx()

Constructs a Verbal Expression

Utilities

sanitize()

Escape characters expected special by regex engines

`%>%`

Pipe operator

Rules

rx_any_of()

Match any of these characters exactly once.

rx_anything()

Match any character(s) any (including zero) number of times.

rx_anything_but()

Match any character(s) except these any (including zero) number of times.

rx_either_of()

Alternatively, match either expression.

rx_end_of_line()

Match the expression only if it appears till the end of the line.

rx_find()

Match an expression.

rx_maybe()

Optionally match an expression.

rx_not()

Ensure that the parameter does not follow.

rx_range()

Match any character within the range defined by the parameters.

rx_something()

Match any character(s) at least once.

rx_something_but()

Match any character(s) except these at least once.

rx_start_of_line()

Match the expression only if it appears from beginning of line.

rx_word_edge()

Find beginning or end of a word.

Lookarounds

rx_avoid_prefix() rx_avoid_suffix()

Negative lookaround functions

rx_seek_prefix() rx_seek_suffix()

Positive lookaround functions

Loops

rx_none_or_more()

Match the previous stuff zero or many times.

rx_one_or_more()

Match the previous stuff one or more times.

rx_multiple()

Match the previous group any number of times.

Special Characters

rx_alnum()

Match alphanumeric characters.

rx_alpha()

Match alphabetic characters.

rx_digit()

Match a digit (0–9).

rx_line_break()

Match a line break.

rx_lowercase()

Match lower case letters.

rx_punctuation()

Match punctuation characters.

rx_space()

Match a space character.

rx_tab()

Match a tab character.

rx_uppercase()

Match upper case letters.

rx_whitespace()

Match a whitespace character.

rx_word()

Match a word.

rx_word_char()

Match a word character.

Capture Groups

rx_begin_capture()

Begin a capture group.

rx_end_capture()

End a capture group.

Modifiers

rx_with_any_case()

Control case-insensitive matching.