rebus.base (version 0.0-3)

CharacterClasses: Class Constants

Description

Match a class of values. These are typically used in combination with char_class to create new character classes.

Usage

ALPHA
ALNUM
BLANK
CNTRL
DIGIT
GRAPH
LOWER
PRINT
PUNCT
SPACE
UPPER
HEX_DIGIT
ANY_CHAR
GRAPHEME
NEWLINE
DGT
WRD
SPC
NOT_DGT
NOT_WRD
NOT_SPC
ASCII_DIGIT
ASCII_LOWER
ASCII_UPPER
ASCII_ALPHA
ASCII_ALNUM
UNMATCHABLE

Format

An object of class regex (inherits from character) of length 1.

See Also

ClassGroups for the functional form, SpecialCharacters for regex metacharacters, Anchors for constants to match the start/end of a string, WordBoundaries for contants to match the start/end of a word.

Examples

# R character classes
ALNUM
ALPHA
BLANK
CNTRL
DIGIT
GRAPH
LOWER
PRINT
PUNCT
SPACE
UPPER
HEX_DIGIT

# Special chars
ANY_CHAR
GRAPHEME
NEWLINE

# Generic classes
DGT
WRD
SPC

# Generic negated classes
NOT_DGT
NOT_WRD
NOT_SPC

# Non-locale-specific classes
ASCII_DIGIT
ASCII_LOWER
ASCII_UPPER
ASCII_ALPHA
ASCII_ALNUM

# An oxymoron
UNMATCHABLE

# Usage
x <- c("a1 A", "a1 a")
rx <- LOWER %R% DIGIT %R% SPACE %R% UPPER
stringi::stri_detect_regex(x, rx)

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