Package ‘rebus’April 25, 2017

Type Package

Title Build Regular Expressions in a Human Readable Way

Version 0.1-3

Date 2017-04-25

Author Richard Cotton [aut, cre]

Maintainer Richard Cotton <richierocks@gmail.com>

Description Build regular expressions piece by piece using human readable code.This package is designed for interactive use. For package development, usethe rebus.* dependencies.

Depends R (>= 3.1.0)

Imports rebus.base (>= 0.0-3), rebus.datetimes, rebus.numbers,rebus.unicode (>= 0.0-2)

Suggests testthat

License Unlimited

LazyLoad yes

LazyData yes

Acknowledgments Development of this package was partially funded bythe Proteomics Core at Weill Cornell Medical College in Qatar<http://qatar-weill.cornell.edu>. The Core is supported by'Biomedical Research Program' funds, a program funded by QatarFoundation.

RoxygenNote 6.0.1

Collate 'export-base.R' 'export-datetimes.R' 'export-numbers.R''export-unicode.R' 'imports.R' 'regex-package.R'

NeedsCompilation no

Repository CRAN

Date/Publication 2017-04-25 21:42:46 UTC

1

2 Anchors

R topics documented:

Anchors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2as.regex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Backreferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3CharacterClasses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3char_class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ClassGroups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Concatenation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4DateTime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4escape_special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4exactly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4format.regex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5get_weekdays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5IsoClasses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5literal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5lookahead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5modify_mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6number_range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6or . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6rebus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6recursive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8regex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8repeated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8ReplacementCase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8roman . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9SpecialCharacters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Unicode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9UnicodeGeneralCategory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9UnicodeOperators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9UnicodeProperty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10whole_word . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10WordBoundaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Index 11

Anchors The start or end of a string

Description

See Anchors.

as.regex 3

as.regex Convert or test for regex objects

Description

See as.regex.

Backreferences Backreferences

Description

See Backreferences.

capture Capture a token, or not

Description

See capture.

CharacterClasses Class Constants

Description

See CharacterClasses.

char_class A range or char_class of characters

Description

See char_class.

4 exactly

ClassGroups Character classes

Description

See ClassGroups.

Concatenation Combine strings together

Description

See Concatenation.

DateTime Date-time regexes

Description

See DateTime.

escape_special Escape special characters

Description

See escape_special.

exactly Make a regex exact

Description

See exactly.

format.regex 5

format.regex Print or format regex objects

Description

See format.regex.

get_weekdays Get the days of the week or months of the year

Description

See get_weekdays.

IsoClasses ISO 8601 date-time classes

Description

See IsoClasses.

literal Treat part of a regular expression literally

Description

See literal.

lookahead Lookaround

Description

See lookahead.

6 rebus

modify_mode Apply mode modifiers

Description

See modify_mode.

number_range Generate a regular expression for a number range

Description

See number_range.

or Alternation

Description

See or.

rebus rebus: Regular Expression Builder, Um, Something

Description

Build regular expressions in a human readable way.

Details

Regular expressions are a very powerful tool, but the syntax is terse enough to be difficult to read.This makes bugs easy to introduce, and hard to find. This package contains functions to makebuilding regular expressions easier.

Author(s)

Richard Cotton <richierocks@gmail.com>

rebus 7

See Also

regex and regexpr The ‘stringr‘ and ‘stringi‘ packages provide tools for matching regular expres-sions and nicely complement this package. http://www.regular-expressions.info has goodadvice on using regular expression in R. In particular, see http://www.regular-expressions.info/rlanguage.html and http://www.regular-expressions.info/examples.html https://www.debuggex.com is a visual regex debugging and testing site.

Examples

### Match a hex colour, like `"#99af01"`# This reads *Match a hash, followed by six hexadecimal values.*

"#" %R% hex_digit(6)

# To match only a hex colour and nothing else, you can add anchors to the# start and end of the expression.

START %R% "#" %R% hex_digit(6) %R% END

### Simple email address matching.# This reads *Match one or more letters, numbers, dots, underscores, percents,# plusses or hyphens. Then match an 'at' symbol. Then match one or more letters,# numbers, dots, or hyphens. Then match a dot. Then match two to four letters.*

one_or_more(char_class(ASCII_ALNUM %R% "._%+-")) %R%"@" %R%one_or_more(char_class(ASCII_ALNUM %R% ".-")) %R%DOT %R%ascii_alpha(2, 4)

### IP address matching.# First we need an expression to match numbers between 0 and 255. Both the# following syntaxes read *Match two then five then a number between zero and# five. Or match two then a number between zero and four then a digit. Or match# an optional zero or one followed by an optional digit folowed by a compulsory# digit. Make this a single token, but don't capture it.*

# Using the %|% operatorip_element <- group(

"25" %R% char_range(0, 5) %|%"2" %R% char_range(0, 4) %R% ascii_digit() %|%optional(char_class("01")) %R% optional(ascii_digit()) %R% ascii_digit()

)

# The same again, this time using the or functionip_element <- or(

"25" %R% char_range(0, 5),"2" %R% char_range(0, 4) %R% ascii_digit(),optional(char_class("01")) %R% optional(ascii_digit()) %R% ascii_digit()

)

# It's easier to write using number_range, though it isn't quite as optimal

8 ReplacementCase

# as handcrafted regexes.number_range(0, 255, allow_leading_zeroes = TRUE)

# Now an IP address consists of 4 of these numbers separated by dots. This# reads *Match a word boundary. Then create a token from an `ip_element`# followed by a dot, and repeat it three times. Then match another `ip_element`# followed by a word boundary.*

BOUNDARY %R%repeated(group(ip_element %R% DOT), 3) %R%ip_element %R%BOUNDARY

recursive Make the regular expression recursive.

Description

See recursive.

regex Create a regex

Description

See regex.

repeated Repeat values

Description

See repeated.

ReplacementCase Force the case of replacement values

Description

See ReplacementCase.

roman 9

roman Roman numerals

Description

See roman.

SpecialCharacters Special characters

Description

See SpecialCharacters.

Unicode Unicode classes

Description

See Unicode.

UnicodeGeneralCategory

Unicode General Categories

Description

See UnicodeGeneralCategory.

UnicodeOperators Unicode Operators

Description

See UnicodeOperators.

10 WordBoundaries

UnicodeProperty Unicode Properties

Description

See UnicodeProperty.

whole_word Match a whole word

Description

See whole_word.

WordBoundaries Word boundaries

Description

See WordBoundaries.

Index

%R% (Concatenation), 4%c% (Concatenation), 4

ADDITIONAL_ARROWS (Unicode), 9additional_arrows (Unicode), 9AEGEAN_NUMBERS (Unicode), 9aegean_numbers (Unicode), 9ALCHEMICAL_SYMBOLS (Unicode), 9alchemical_symbols (Unicode), 9ALNUM (CharacterClasses), 3alnum (ClassGroups), 4ALPHA (CharacterClasses), 3alpha (ClassGroups), 4ALPHABETIC_PRESENTATION_FORMS

(Unicode), 9alphabetic_presentation_forms

(Unicode), 9AM_PM (DateTime), 4Anchors, 2, 2ANCIENT_GREEK_MUSICAL_NOTATION

(Unicode), 9ancient_greek_musical_notation

(Unicode), 9ANCIENT_GREEK_NUMBERS (Unicode), 9ancient_greek_numbers (Unicode), 9ANCIENT_SYMBOLS (Unicode), 9ancient_symbols (Unicode), 9ANY_CHAR (CharacterClasses), 3any_char (ClassGroups), 4ARABIC (Unicode), 9arabic (Unicode), 9ARABIC_EXTENDED_A (Unicode), 9arabic_extended_a (Unicode), 9ARABIC_MATHEMATICAL_ALPHANUMERIC_SYMBOLS

(Unicode), 9arabic_mathematical_alphanumeric_symbols

(Unicode), 9ARABIC_PRESENTATION_FORMS_A (Unicode), 9arabic_presentation_forms_a (Unicode), 9ARABIC_PRESENTATION_FORMS_B (Unicode), 9

arabic_presentation_forms_b (Unicode), 9ARABIC_SUPPLEMENT (Unicode), 9arabic_supplement (Unicode), 9ARMENIAN (Unicode), 9armenian (Unicode), 9ARMENIAN_LIGATURES (Unicode), 9armenian_ligatures (Unicode), 9as.regex, 3, 3as_lower (ReplacementCase), 8as_upper (ReplacementCase), 8ASCII_ALNUM (CharacterClasses), 3ascii_alnum (ClassGroups), 4ASCII_ALPHA (CharacterClasses), 3ascii_alpha (ClassGroups), 4ASCII_DIGIT (CharacterClasses), 3ascii_digit (ClassGroups), 4ASCII_LOWER (CharacterClasses), 3ascii_lower (ClassGroups), 4ASCII_UPPER (CharacterClasses), 3ascii_upper (ClassGroups), 4AVESTAN (Unicode), 9avestan (Unicode), 9

Backreferences, 3, 3BACKSLASH (SpecialCharacters), 9BALINESE (Unicode), 9balinese (Unicode), 9BAMUN (Unicode), 9bamun (Unicode), 9BAMUN_SUPPLEMENT (Unicode), 9bamun_supplement (Unicode), 9BASSA_VAH (Unicode), 9bassa_vah (Unicode), 9BATAK (Unicode), 9batak (Unicode), 9BENGALI_AND_ASSAMESE (Unicode), 9bengali_and_assamese (Unicode), 9BLANK (CharacterClasses), 3blank (ClassGroups), 4BLOCK_ELEMENTS (Unicode), 9

11

12 INDEX

block_elements (Unicode), 9BOPOMOFO (Unicode), 9bopomofo (Unicode), 9BOPOMOFO_EXTENDED (Unicode), 9bopomofo_extended (Unicode), 9BOUNDARY (WordBoundaries), 10BOX_DRAWING (Unicode), 9box_drawing (Unicode), 9BRAHMI (Unicode), 9brahmi (Unicode), 9BRAILLE_PATTERNS (Unicode), 9braille_patterns (Unicode), 9BUGINESE (Unicode), 9buginese (Unicode), 9BUHID (Unicode), 9buhid (Unicode), 9BYZANTINE_MUSICAL_SYMBOLS (Unicode), 9byzantine_musical_symbols (Unicode), 9

capture, 3, 3CARD_SUITS (Unicode), 9card_suits (Unicode), 9CARET (SpecialCharacters), 9CARIAN (Unicode), 9carian (Unicode), 9case_insensitive (modify_mode), 6CAUCASIAN_ALBANIAN (Unicode), 9caucasian_albanian (Unicode), 9CENTURY (DateTime), 4CENTURY_IN (DateTime), 4CHAKMA (Unicode), 9chakma (Unicode), 9CHAM (Unicode), 9cham (Unicode), 9char_class, 3, 3char_range (ClassGroups), 4CharacterClasses, 3, 3CHEROKEE (Unicode), 9cherokee (Unicode), 9CHESS_CHECKERS_DRAUGHTS (Unicode), 9chess_checkers_draughts (Unicode), 9CJK_COMPATIBILITY (Unicode), 9cjk_compatibility (Unicode), 9CJK_COMPATIBILITY_FORMS (Unicode), 9cjk_compatibility_forms (Unicode), 9CJK_COMPATIBILITY_IDEOGRAPHS (Unicode),

9cjk_compatibility_ideographs (Unicode),

9

CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT(Unicode), 9

cjk_compatibility_ideographs_supplement(Unicode), 9

CJK_IDEOGRAPHIC_DESCRIPTION_CHARACTERS(Unicode), 9

cjk_ideographic_description_characters(Unicode), 9

CJK_STROKES (Unicode), 9cjk_strokes (Unicode), 9CJK_SYMBOLS_AND_PUNCTUATION (Unicode), 9cjk_symbols_and_punctuation (Unicode), 9CJK_UNIFIED_IDEOGRAPHS (Unicode), 9cjk_unified_ideographs (Unicode), 9CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A

(Unicode), 9cjk_unified_ideographs_extension_a

(Unicode), 9CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B

(Unicode), 9cjk_unified_ideographs_extension_b

(Unicode), 9CJK_UNIFIED_IDEOGRAPHS_EXTENSION_C

(Unicode), 9cjk_unified_ideographs_extension_c

(Unicode), 9CJK_UNIFIED_IDEOGRAPHS_EXTENSION_D

(Unicode), 9cjk_unified_ideographs_extension_d

(Unicode), 9ClassGroups, 4, 4CLOSE_BRACKET (SpecialCharacters), 9CLOSE_PAREN (SpecialCharacters), 9CNTRL (CharacterClasses), 3cntrl (ClassGroups), 4COMBINING_DIACRITIC_EXTENDED (Unicode),

9combining_diacritic_extended (Unicode),

9COMBINING_DIACRITIC_MARKS (Unicode), 9combining_diacritic_marks (Unicode), 9COMBINING_DIACRITIC_MARKS_FOR_SYMBOLS

(Unicode), 9combining_diacritic_marks_for_symbols

(Unicode), 9COMBINING_DIACRITIC_SUPPLEMENT

(Unicode), 9combining_diacritic_supplement

INDEX 13

(Unicode), 9COMBINING_HALF_MARKS (Unicode), 9combining_half_marks (Unicode), 9COMMON_INDIC_NUMBER_FORMS (Unicode), 9common_indic_number_forms (Unicode), 9Concatenation, 4, 4CONTROL_PICTURES (Unicode), 9control_pictures (Unicode), 9COPTIC (Unicode), 9coptic (Unicode), 9COPTIC_EPACT_NUMBERS (Unicode), 9coptic_epact_numbers (Unicode), 9COUNTING_ROD_NUMERALS (Unicode), 9counting_rod_numerals (Unicode), 9CUNEIFORM (Unicode), 9cuneiform (Unicode), 9CUNEIFORM_NUMBERS_AND_PUNCTUATION

(Unicode), 9cuneiform_numbers_and_punctuation

(Unicode), 9CURRENCY_SYMBOLS (Unicode), 9currency_symbols (Unicode), 9CYPRIOT_SYLLABARY (Unicode), 9cypriot_syllabary (Unicode), 9CYRILLIC (Unicode), 9cyrillic (Unicode), 9CYRILLIC_EXTENDED_A (Unicode), 9cyrillic_extended_a (Unicode), 9CYRILLIC_EXTENDED_B (Unicode), 9cyrillic_extended_b (Unicode), 9CYRILLIC_SUPPLEMENT (Unicode), 9cyrillic_supplement (Unicode), 9

DateTime, 4, 4datetime (DateTime), 4DAY (DateTime), 4DAY_IN (DateTime), 4DAY_OF_YEAR (DateTime), 4DAY_OF_YEAR_IN (DateTime), 4DAY_SINGLE (DateTime), 4DESERET (Unicode), 9deseret (Unicode), 9DEVANAGARI (Unicode), 9devanagari (Unicode), 9DEVANAGARI_EXTENDED (Unicode), 9devanagari_extended (Unicode), 9DGT (CharacterClasses), 3dgt (ClassGroups), 4DIGIT (CharacterClasses), 3

digit (ClassGroups), 4DINGBATS (Unicode), 9dingbats (Unicode), 9DMY (DateTime), 4DMY_IN (DateTime), 4DOLLAR (SpecialCharacters), 9DOMINO_TILES (Unicode), 9domino_tiles (Unicode), 9DOT (SpecialCharacters), 9DTSEP (DateTime), 4duplicate_group_names (modify_mode), 6DUPLOYAN (Unicode), 9duployan (Unicode), 9DYM (DateTime), 4DYM_IN (DateTime), 4

EGYPTIAN_HIEROGLYPHS (Unicode), 9egyptian_hieroglyphs (Unicode), 9ELBASAN (Unicode), 9elbasan (Unicode), 9EMOTICONS (Unicode), 9emoticons (Unicode), 9ENCLOSED_ALPHANUMERIC_SUPPLEMENT

(Unicode), 9enclosed_alphanumeric_supplement

(Unicode), 9ENCLOSED_ALPHANUMERICS (Unicode), 9enclosed_alphanumerics (Unicode), 9ENCLOSED_CJK_LETTERS_AND_MONTHS

(Unicode), 9enclosed_cjk_letters_and_months

(Unicode), 9ENCLOSED_IDEOGRAPHIC_SUPPLEMENT

(Unicode), 9enclosed_ideographic_supplement

(Unicode), 9END (Anchors), 2engroup (capture), 3escape_special, 4, 4ETHIOPIC (Unicode), 9ethiopic (Unicode), 9ETHIOPIC_EXTENDED (Unicode), 9ethiopic_extended (Unicode), 9ETHIOPIC_EXTENDED_A (Unicode), 9ethiopic_extended_a (Unicode), 9ETHIOPIC_SUPPLEMENT (Unicode), 9ethiopic_supplement (Unicode), 9exactly, 4, 4

14 INDEX

FLOORS_AND_CEILINGS (Unicode), 9floors_and_ceilings (Unicode), 9format.regex, 5, 5FRACTIONAL_SECOND (DateTime), 4FRACTIONAL_SECOND_IN (DateTime), 4free_spacing (modify_mode), 6FULLWIDTH_ASCII_DIGITS (Unicode), 9fullwidth_ascii_digits (Unicode), 9FULLWIDTH_ASCII_PUNCTUATION (Unicode), 9fullwidth_ascii_punctuation (Unicode), 9

GENERAL_PUNCTUATION (Unicode), 9general_punctuation (Unicode), 9GEOMETRIC_SHAPES (Unicode), 9geometric_shapes (Unicode), 9GEOMETRIC_SHAPES_EXTENDED (Unicode), 9geometric_shapes_extended (Unicode), 9GEORGIAN (Unicode), 9georgian (Unicode), 9GEORGIAN_SUPPLEMENT (Unicode), 9georgian_supplement (Unicode), 9get_months (get_weekdays), 5get_weekdays, 5, 5GLAGOLITIC (Unicode), 9glagolitic (Unicode), 9GOTHIC (Unicode), 9gothic (Unicode), 9GRANTHA (Unicode), 9grantha (Unicode), 9GRAPH (CharacterClasses), 3graph (ClassGroups), 4GRAPHEME (CharacterClasses), 3grapheme (ClassGroups), 4GREEK_AND_COPTIC (Unicode), 9greek_and_coptic (Unicode), 9GREEK_EXTENDED (Unicode), 9greek_extended (Unicode), 9group (capture), 3GUJARATI (Unicode), 9gujarati (Unicode), 9GURMUKHI (Unicode), 9gurmukhi (Unicode), 9

HALFWIDTH_AND_FULLWIDTH_FORMS(Unicode), 9

halfwidth_and_fullwidth_forms(Unicode), 9

HANGUL_COMPATIBILITY_JAMO (Unicode), 9hangul_compatibility_jamo (Unicode), 9

HANGUL_JAMO (Unicode), 9hangul_jamo (Unicode), 9HANGUL_JAMO_EXTENDED_A (Unicode), 9hangul_jamo_extended_a (Unicode), 9HANGUL_JAMO_EXTENDED_B (Unicode), 9hangul_jamo_extended_b (Unicode), 9HANGUL_SYLLABLES (Unicode), 9hangul_syllables (Unicode), 9HANUNOO (Unicode), 9hanunoo (Unicode), 9HEBREW (Unicode), 9hebrew (Unicode), 9HEX_DIGIT (CharacterClasses), 3hex_digit (ClassGroups), 4HIRAGANA (Unicode), 9hiragana (Unicode), 9HM (DateTime), 4HM_IN (DateTime), 4HMS (DateTime), 4HMS_IN (DateTime), 4HOUR12 (DateTime), 4HOUR12_IN (DateTime), 4HOUR12_SINGLE (DateTime), 4HOUR24 (DateTime), 4HOUR24_IN (DateTime), 4HOUR24_SINGLE (DateTime), 4

ICU_REF1 (Backreferences), 3ICU_REF2 (Backreferences), 3ICU_REF3 (Backreferences), 3ICU_REF4 (Backreferences), 3ICU_REF5 (Backreferences), 3ICU_REF6 (Backreferences), 3ICU_REF7 (Backreferences), 3ICU_REF8 (Backreferences), 3ICU_REF9 (Backreferences), 3IMPERIAL_ARAMAIC (Unicode), 9imperial_aramaic (Unicode), 9INVISIBLE_OPERATORS (Unicode), 9invisible_operators (Unicode), 9IPA_EXTENSIONS (Unicode), 9ipa_extensions (Unicode), 9is.regex (as.regex), 3ISO_DATE (DateTime), 4iso_date (IsoClasses), 5ISO_DATE_IN (DateTime), 4ISO_DATETIME (DateTime), 4iso_datetime (IsoClasses), 5ISO_DATETIME_IN (DateTime), 4

INDEX 15

ISO_TIME (DateTime), 4iso_time (IsoClasses), 5ISO_TIME_IN (DateTime), 4IsoClasses, 5, 5IsoDateTime (IsoClasses), 5

JAPANESE_CHESS (Unicode), 9japanese_chess (Unicode), 9JAVANESE (Unicode), 9javanese (Unicode), 9

KAITHI (Unicode), 9kaithi (Unicode), 9KANA_SUPPLEMENT (Unicode), 9kana_supplement (Unicode), 9KANBUN (Unicode), 9kanbun (Unicode), 9KANGXI_RADICALS (Unicode), 9kangxi_radicals (Unicode), 9KANGXI_RADICALS_SUPPLEMENT (Unicode), 9kangxi_radicals_supplement (Unicode), 9KANNADA (Unicode), 9kannada (Unicode), 9KATAKANA (Unicode), 9katakana (Unicode), 9KATAKANA_PHONETIC_EXTENSIONS (Unicode),

9katakana_phonetic_extensions (Unicode),

9KAYAH_LI (Unicode), 9kayah_li (Unicode), 9KHAROSHTHI (Unicode), 9kharoshthi (Unicode), 9KHMER (Unicode), 9khmer (Unicode), 9KHMER_SYMBOLS (Unicode), 9khmer_symbols (Unicode), 9KHOJKI (Unicode), 9khojki (Unicode), 9KHUDAWADI (Unicode), 9khudawadi (Unicode), 9

LAO (Unicode), 9lao (Unicode), 9LATIN (Unicode), 9latin (Unicode), 9LATIN_1_PUNCTUATION (Unicode), 9latin_1_punctuation (Unicode), 9LATIN_1_SUPPLEMENT (Unicode), 9

latin_1_supplement (Unicode), 9LATIN_EXTENDED_A (Unicode), 9latin_extended_a (Unicode), 9LATIN_EXTENDED_ADDITIONAL (Unicode), 9latin_extended_additional (Unicode), 9LATIN_EXTENDED_B (Unicode), 9latin_extended_b (Unicode), 9LATIN_EXTENDED_C (Unicode), 9latin_extended_c (Unicode), 9LATIN_EXTENDED_D (Unicode), 9latin_extended_d (Unicode), 9LATIN_EXTENDED_E (Unicode), 9latin_extended_e (Unicode), 9LATIN_LIGATURES (Unicode), 9latin_ligatures (Unicode), 9lazy (repeated), 8LEPCHA (Unicode), 9lepcha (Unicode), 9LETTERLIKE_SYMBOLS (Unicode), 9letterlike_symbols (Unicode), 9LIMBU (Unicode), 9limbu (Unicode), 9LINEAR_A (Unicode), 9linear_a (Unicode), 9LINEAR_B_IDEOGRAMS (Unicode), 9linear_b_ideograms (Unicode), 9LINEAR_B_SYLLABARY (Unicode), 9linear_b_syllabary (Unicode), 9LISU (Unicode), 9lisu (Unicode), 9literal, 5, 5lookahead, 5, 5lookbehind (lookahead), 5LOWER (CharacterClasses), 3lower (ClassGroups), 4LYCIAN (Unicode), 9lycian (Unicode), 9LYDIAN (Unicode), 9lydian (Unicode), 9

MAHAJANI (Unicode), 9mahajani (Unicode), 9MAHJONG_TILES (Unicode), 9mahjong_tiles (Unicode), 9MALAYALAM (Unicode), 9malayalam (Unicode), 9MANDAIC (Unicode), 9mandaic (Unicode), 9MANICHAEAN (Unicode), 9

16 INDEX

manichaean (Unicode), 9MATH_ARROWS (Unicode), 9math_arrows (Unicode), 9MATHEMATICAL_ALPHANUMERIC_SYMBOLS

(Unicode), 9mathematical_alphanumeric_symbols

(Unicode), 9MDY (DateTime), 4MDY_IN (DateTime), 4MEETEI_MAYEK (Unicode), 9meetei_mayek (Unicode), 9MEETEI_MAYEK_EXTENSIONS (Unicode), 9meetei_mayek_extensions (Unicode), 9MENDE_KIKAKUI (Unicode), 9mende_kikakui (Unicode), 9MEROITIC_CURSIVE (Unicode), 9meroitic_cursive (Unicode), 9MEROITIC_HIEROGLYPHS (Unicode), 9meroitic_hieroglyphs (Unicode), 9MIAO (Unicode), 9miao (Unicode), 9MINUTE (DateTime), 4MINUTE_IN (DateTime), 4MISCELLANEOUS_MATHEMATICAL_SYMBOLS_A

(Unicode), 9miscellaneous_mathematical_symbols_a

(Unicode), 9MISCELLANEOUS_MATHEMATICAL_SYMBOLS_B

(Unicode), 9miscellaneous_mathematical_symbols_b

(Unicode), 9MISCELLANEOUS_SYMBOLS_AND_PICTOGRAPHS

(Unicode), 9miscellaneous_symbols_and_pictographs

(Unicode), 9MISCELLANEOUS_TECHNICAL (Unicode), 9miscellaneous_technical (Unicode), 9MODI (Unicode), 9modi (Unicode), 9MODIFIER_TONE_LETTERS (Unicode), 9modifier_tone_letters (Unicode), 9modify_mode, 6, 6MONGOLIAN (Unicode), 9mongolian (Unicode), 9MONTH (DateTime), 4MONTH_IN (DateTime), 4MRO (Unicode), 9mro (Unicode), 9

MS (DateTime), 4MS_IN (DateTime), 4multi_line (modify_mode), 6MUSICAL_SYMBOLS (Unicode), 9musical_symbols (Unicode), 9MYANMAR (Unicode), 9myanmar (Unicode), 9MYANMAR_EXTENDED_A (Unicode), 9myanmar_extended_a (Unicode), 9MYANMAR_EXTENDED_B (Unicode), 9myanmar_extended_b (Unicode), 9MYD (DateTime), 4MYD_IN (DateTime), 4

NABATAEAN (Unicode), 9nabataean (Unicode), 9negate_and_group (char_class), 3negated_char_class (char_class), 3negative_lookahead (lookahead), 5negative_lookbehind (lookahead), 5NEW_TAI_LUE (Unicode), 9new_tai_lue (Unicode), 9NEWLINE (CharacterClasses), 3newline (ClassGroups), 4NKO (Unicode), 9nko (Unicode), 9no_backslash_escaping (modify_mode), 6NOT_BOUNDARY (WordBoundaries), 10NOT_DGT (CharacterClasses), 3not_dgt (ClassGroups), 4NOT_SPC (CharacterClasses), 3not_spc (ClassGroups), 4NOT_WRD (CharacterClasses), 3not_wrd (ClassGroups), 4NUMBER_FORMS (Unicode), 9number_forms (Unicode), 9number_range, 6, 6

OGHAM (Unicode), 9ogham (Unicode), 9OL_CHIKI (Unicode), 9ol_chiki (Unicode), 9OLD_ITALIC (Unicode), 9old_italic (Unicode), 9OLD_NORTH_ARABIAN (Unicode), 9old_north_arabian (Unicode), 9OLD_PERMIC (Unicode), 9old_permic (Unicode), 9OLD_PERSIAN (Unicode), 9

INDEX 17

old_persian (Unicode), 9OLD_SOUTH_ARABIAN (Unicode), 9old_south_arabian (Unicode), 9OLD_TURKIC (Unicode), 9old_turkic (Unicode), 9one_or_more (repeated), 8OPEN_BRACE (SpecialCharacters), 9OPEN_BRACKET (SpecialCharacters), 9OPEN_PAREN (SpecialCharacters), 9OPT_LEADING_0 (DateTime), 4OPTICAL_CHARACTER_RECOGNITION

(Unicode), 9optical_character_recognition

(Unicode), 9optional (repeated), 8or, 6, 6or1 (or), 6ORIYA (Unicode), 9oriya (Unicode), 9ORNAMENTAL_DINGBATS (Unicode), 9ornamental_dingbats (Unicode), 9OSMANYA (Unicode), 9osmanya (Unicode), 9

PAHAWH_HMONG (Unicode), 9pahawh_hmong (Unicode), 9PAHLAVI_INSCRIPTIONAL (Unicode), 9pahlavi_inscriptional (Unicode), 9PAHLAVI_PSALTER (Unicode), 9pahlavi_psalter (Unicode), 9PALMYRENE (Unicode), 9palmyrene (Unicode), 9PAU_CIN_HAU (Unicode), 9pau_cin_hau (Unicode), 9PHAGS_PA (Unicode), 9phags_pa (Unicode), 9PHAISTOS_DISC (Unicode), 9phaistos_disc (Unicode), 9PHOENICIAN (Unicode), 9phoenician (Unicode), 9PHONETIC_EXTENSIONS (Unicode), 9phonetic_extensions (Unicode), 9PHONETIC_EXTENSIONS_SUPPLEMENT

(Unicode), 9phonetic_extensions_supplement

(Unicode), 9PIPE (SpecialCharacters), 9PLAYING_CARDS (Unicode), 9playing_cards (Unicode), 9

PLUS (SpecialCharacters), 9PRINT (CharacterClasses), 3print.regex (format.regex), 5printable (ClassGroups), 4PRIVATE_USE_AREA (Unicode), 9private_use_area (Unicode), 9PUNCT (CharacterClasses), 3punct (ClassGroups), 4

QUESTION (SpecialCharacters), 9

rebus, 6rebus-package (rebus), 6recursive, 8, 8REF1 (Backreferences), 3REF2 (Backreferences), 3REF3 (Backreferences), 3REF4 (Backreferences), 3REF5 (Backreferences), 3REF6 (Backreferences), 3REF7 (Backreferences), 3REF8 (Backreferences), 3REF9 (Backreferences), 3regex, 7, 8, 8regexpr, 7REJANG (Unicode), 9rejang (Unicode), 9repeated, 8, 8ReplacementCase, 8, 8ROMAN (roman), 9roman, 9, 9RUMI_NUMERAL_SYMBOLS (Unicode), 9rumi_numeral_symbols (Unicode), 9RUNIC (Unicode), 9runic (Unicode), 9

SAMARITAN (Unicode), 9samaritan (Unicode), 9SAURASHTRA (Unicode), 9saurashtra (Unicode), 9SECOND (DateTime), 4SECOND_IN (DateTime), 4SHARADA (Unicode), 9sharada (Unicode), 9SHAVIAN (Unicode), 9shavian (Unicode), 9SHORTHAND_FORMAT_CONTROLS (Unicode), 9shorthand_format_controls (Unicode), 9SIDDHAM (Unicode), 9

18 INDEX

siddham (Unicode), 9single_line (modify_mode), 6SINHALA (Unicode), 9sinhala (Unicode), 9SINHALA_ARCHAIC_NUMBERS (Unicode), 9sinhala_archaic_numbers (Unicode), 9SMALL_FORM_VARIANTS (Unicode), 9small_form_variants (Unicode), 9SORA_SOMPENG (Unicode), 9sora_sompeng (Unicode), 9SPACE (CharacterClasses), 3space (ClassGroups), 4SPACING_MODIFIER_LETTERS (Unicode), 9spacing_modifier_letters (Unicode), 9SPC (CharacterClasses), 3spc (ClassGroups), 4SpecialCharacters, 9, 9SPECIALS (Unicode), 9specials (Unicode), 9STAR (SpecialCharacters), 9START (Anchors), 2SUNDANESE (Unicode), 9sundanese (Unicode), 9SUNDANESE_SUPPLEMENT (Unicode), 9sundanese_supplement (Unicode), 9SUPERSCRIPTS_AND_SUBSCRIPTS (Unicode), 9superscripts_and_subscripts (Unicode), 9SUPPLEMENTAL_ARROWS_A (Unicode), 9supplemental_arrows_a (Unicode), 9SUPPLEMENTAL_MATHEMATICAL_OPERATORS

(Unicode), 9supplemental_mathematical_operators

(Unicode), 9SUPPLEMENTAL_PUNCTUATION (Unicode), 9supplemental_punctuation (Unicode), 9SUPPLEMENTARY_PRIVATE_USE_AREA_A

(Unicode), 9supplementary_private_use_area_a

(Unicode), 9SUPPLEMENTARY_PRIVATE_USE_AREA_B

(Unicode), 9supplementary_private_use_area_b

(Unicode), 9SYLOTI_NAGRI (Unicode), 9syloti_nagri (Unicode), 9SYRIAC (Unicode), 9syriac (Unicode), 9

TAGALOG (Unicode), 9

tagalog (Unicode), 9TAGBANWA (Unicode), 9tagbanwa (Unicode), 9TAGS (Unicode), 9tags (Unicode), 9TAI_LE (Unicode), 9tai_le (Unicode), 9TAI_THAM (Unicode), 9tai_tham (Unicode), 9TAI_VIET (Unicode), 9tai_viet (Unicode), 9TAI_XUAN_JING_SYMBOLS (Unicode), 9tai_xuan_jing_symbols (Unicode), 9TAKRI (Unicode), 9takri (Unicode), 9TAMIL (Unicode), 9tamil (Unicode), 9TELUGU (Unicode), 9telugu (Unicode), 9THAANA (Unicode), 9thaana (Unicode), 9THAI (Unicode), 9thai (Unicode), 9TIBETAN (Unicode), 9tibetan (Unicode), 9TIFINAGH (Unicode), 9tifinagh (Unicode), 9TIMEZONE (DateTime), 4TIMEZONE_OFFSET (DateTime), 4TIRHUTA (Unicode), 9tirhuta (Unicode), 9token (capture), 3TRANSPORT_AND_MAP_SYMBOLS (Unicode), 9transport_and_map_symbols (Unicode), 9

UGARITIC (Unicode), 9ugaritic (Unicode), 9UGC_CASED_LETTER

(UnicodeGeneralCategory), 9ugc_cased_letter

(UnicodeGeneralCategory), 9UGC_CLOSE_PUNCTUATION

(UnicodeGeneralCategory), 9ugc_close_punctuation

(UnicodeGeneralCategory), 9UGC_CONNECTOR_PUNCTUATION

(UnicodeGeneralCategory), 9ugc_connector_punctuation

(UnicodeGeneralCategory), 9

INDEX 19

UGC_CONTROL (UnicodeGeneralCategory), 9ugc_control (UnicodeGeneralCategory), 9UGC_CURRENCY_SYMBOL

(UnicodeGeneralCategory), 9ugc_currency_symbol

(UnicodeGeneralCategory), 9UGC_DASH_PUNCTUATION

(UnicodeGeneralCategory), 9ugc_dash_punctuation

(UnicodeGeneralCategory), 9UGC_DECIMAL_NUMBER

(UnicodeGeneralCategory), 9ugc_decimal_number

(UnicodeGeneralCategory), 9UGC_ENCLOSING_MARK

(UnicodeGeneralCategory), 9ugc_enclosing_mark

(UnicodeGeneralCategory), 9UGC_FINAL_PUNCTUATION

(UnicodeGeneralCategory), 9ugc_final_punctuation

(UnicodeGeneralCategory), 9UGC_FORMAT_CONTROL

(UnicodeGeneralCategory), 9ugc_format_control

(UnicodeGeneralCategory), 9UGC_INITIAL_PUNCTUATION

(UnicodeGeneralCategory), 9ugc_initial_punctuation

(UnicodeGeneralCategory), 9UGC_LETTER (UnicodeGeneralCategory), 9ugc_letter (UnicodeGeneralCategory), 9UGC_LETTER_NUMBER

(UnicodeGeneralCategory), 9ugc_letter_number

(UnicodeGeneralCategory), 9UGC_LINE_SEPARATOR

(UnicodeGeneralCategory), 9ugc_line_separator

(UnicodeGeneralCategory), 9UGC_LOWERCASE_LETTER

(UnicodeGeneralCategory), 9ugc_lowercase_letter

(UnicodeGeneralCategory), 9UGC_MARK (UnicodeGeneralCategory), 9ugc_mark (UnicodeGeneralCategory), 9UGC_MATH_SYMBOL

(UnicodeGeneralCategory), 9

ugc_math_symbol(UnicodeGeneralCategory), 9

UGC_MODIFIER_LETTER(UnicodeGeneralCategory), 9

ugc_modifier_letter(UnicodeGeneralCategory), 9

UGC_MODIFIER_SYMBOL(UnicodeGeneralCategory), 9

ugc_modifier_symbol(UnicodeGeneralCategory), 9

UGC_NONSPACING_MARK(UnicodeGeneralCategory), 9

ugc_nonspacing_mark(UnicodeGeneralCategory), 9

UGC_NUMBER (UnicodeGeneralCategory), 9ugc_number (UnicodeGeneralCategory), 9UGC_OPEN_PUNCTUATION

(UnicodeGeneralCategory), 9ugc_open_punctuation

(UnicodeGeneralCategory), 9UGC_OTHER (UnicodeGeneralCategory), 9ugc_other (UnicodeGeneralCategory), 9UGC_OTHER_LETTER

(UnicodeGeneralCategory), 9ugc_other_letter

(UnicodeGeneralCategory), 9UGC_OTHER_NUMBER

(UnicodeGeneralCategory), 9ugc_other_number

(UnicodeGeneralCategory), 9UGC_OTHER_PUNCTUATION

(UnicodeGeneralCategory), 9ugc_other_punctuation

(UnicodeGeneralCategory), 9UGC_OTHER_SYMBOL

(UnicodeGeneralCategory), 9ugc_other_symbol

(UnicodeGeneralCategory), 9UGC_PARAGRAPH_SEPARATOR

(UnicodeGeneralCategory), 9ugc_paragraph_separator

(UnicodeGeneralCategory), 9UGC_PRIVATE_USE_CONTROL

(UnicodeGeneralCategory), 9ugc_private_use_control

(UnicodeGeneralCategory), 9UGC_PUNCTUATION

(UnicodeGeneralCategory), 9

20 INDEX

ugc_punctuation(UnicodeGeneralCategory), 9

UGC_SEPARATOR (UnicodeGeneralCategory),9

ugc_separator (UnicodeGeneralCategory),9

UGC_SPACE_SEPARATOR(UnicodeGeneralCategory), 9

ugc_space_separator(UnicodeGeneralCategory), 9

UGC_SPACING_MARK(UnicodeGeneralCategory), 9

ugc_spacing_mark(UnicodeGeneralCategory), 9

UGC_SURROGATE_CONTROL(UnicodeGeneralCategory), 9

ugc_surrogate_control(UnicodeGeneralCategory), 9

UGC_SYMBOL (UnicodeGeneralCategory), 9ugc_symbol (UnicodeGeneralCategory), 9UGC_TITLECASE_LETTER

(UnicodeGeneralCategory), 9ugc_titlecase_letter

(UnicodeGeneralCategory), 9UGC_UNASSIGNED_CONTROL

(UnicodeGeneralCategory), 9ugc_unassigned_control

(UnicodeGeneralCategory), 9UGC_UPPERCASE_LETTER

(UnicodeGeneralCategory), 9ugc_uppercase_letter

(UnicodeGeneralCategory), 9Unicode, 9, 9unicode_intersect (UnicodeOperators), 9unicode_inverse (UnicodeOperators), 9unicode_setdiff (UnicodeOperators), 9unicode_union (UnicodeOperators), 9UnicodeGeneralCategory, 9, 9UnicodeOperators, 9, 9UnicodeProperty, 10, 10UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS

(Unicode), 9unified_canadian_aboriginal_syllabics

(Unicode), 9UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED

(Unicode), 9unified_canadian_aboriginal_syllabics_extended

(Unicode), 9

UNMATCHABLE (CharacterClasses), 3UP_ALPHABETIC (UnicodeProperty), 10up_alphabetic (UnicodeProperty), 10UP_ASCII_HEX_DIGIT (UnicodeProperty), 10up_ascii_hex_digit (UnicodeProperty), 10UP_BIDI_CONTROL (UnicodeProperty), 10up_bidi_control (UnicodeProperty), 10UP_BIDI_MIRRORED (UnicodeProperty), 10up_bidi_mirrored (UnicodeProperty), 10UP_CASE_IGNORABLE (UnicodeProperty), 10up_case_ignorable (UnicodeProperty), 10UP_CASE_SENSITIVE (UnicodeProperty), 10up_case_sensitive (UnicodeProperty), 10UP_CASED (UnicodeProperty), 10up_cased (UnicodeProperty), 10UP_CHANGES_WHEN_CASEFOLDED

(UnicodeProperty), 10up_changes_when_casefolded

(UnicodeProperty), 10UP_CHANGES_WHEN_CASEMAPPED

(UnicodeProperty), 10up_changes_when_casemapped

(UnicodeProperty), 10UP_CHANGES_WHEN_LOWERCASED

(UnicodeProperty), 10up_changes_when_lowercased

(UnicodeProperty), 10UP_CHANGES_WHEN_NFKC_CASEFOLDED

(UnicodeProperty), 10up_changes_when_nfkc_casefolded

(UnicodeProperty), 10UP_CHANGES_WHEN_TITLECASED

(UnicodeProperty), 10up_changes_when_titlecased

(UnicodeProperty), 10UP_CHANGES_WHEN_UPPERCASED

(UnicodeProperty), 10up_changes_when_uppercased

(UnicodeProperty), 10UP_DASH (UnicodeProperty), 10up_dash (UnicodeProperty), 10UP_DEFAULT_IGNORABLE_CODE_POINT

(UnicodeProperty), 10up_default_ignorable_code_point

(UnicodeProperty), 10UP_DEPRECATED (UnicodeProperty), 10up_deprecated (UnicodeProperty), 10UP_DIACRITIC (UnicodeProperty), 10

INDEX 21

up_diacritic (UnicodeProperty), 10UP_EXTENDER (UnicodeProperty), 10up_extender (UnicodeProperty), 10UP_HEX_DIGIT (UnicodeProperty), 10up_hex_digit (UnicodeProperty), 10UP_HYPHEN (UnicodeProperty), 10up_hyphen (UnicodeProperty), 10UP_ID_CONTINUE (UnicodeProperty), 10up_id_continue (UnicodeProperty), 10UP_ID_START (UnicodeProperty), 10up_id_start (UnicodeProperty), 10UP_IDEOGRAPHIC (UnicodeProperty), 10up_ideographic (UnicodeProperty), 10UP_LOWERCASE (UnicodeProperty), 10up_lowercase (UnicodeProperty), 10UP_MATH (UnicodeProperty), 10up_math (UnicodeProperty), 10UP_NONCHARACTER_CODE_POINT

(UnicodeProperty), 10up_noncharacter_code_point

(UnicodeProperty), 10UP_POSIX_ALNUM (UnicodeProperty), 10up_posix_alnum (UnicodeProperty), 10UP_POSIX_BLANK (UnicodeProperty), 10up_posix_blank (UnicodeProperty), 10UP_POSIX_GRAPH (UnicodeProperty), 10up_posix_graph (UnicodeProperty), 10UP_POSIX_PRINT (UnicodeProperty), 10up_posix_print (UnicodeProperty), 10UP_POSIX_XDIGIT (UnicodeProperty), 10up_posix_xdigit (UnicodeProperty), 10UP_QUOTATION_MARK (UnicodeProperty), 10up_quotation_mark (UnicodeProperty), 10UP_SOFT_DOTTED (UnicodeProperty), 10up_soft_dotted (UnicodeProperty), 10UP_TERMINAL_PUNCTUATION

(UnicodeProperty), 10up_terminal_punctuation

(UnicodeProperty), 10UP_UPPERCASE (UnicodeProperty), 10up_uppercase (UnicodeProperty), 10UP_WHITE_SPACE (UnicodeProperty), 10up_white_space (UnicodeProperty), 10UPPER (CharacterClasses), 3upper (ClassGroups), 4

VAI (Unicode), 9vai (Unicode), 9VARIATION_SELECTORS (Unicode), 9

variation_selectors (Unicode), 9VARIATION_SELECTORS_SUPPLEMENT

(Unicode), 9variation_selectors_supplement

(Unicode), 9VEDIC_EXTENSIONS (Unicode), 9vedic_extensions (Unicode), 9VERTICAL_FORMS (Unicode), 9vertical_forms (Unicode), 9

WARANG_CITI (Unicode), 9warang_citi (Unicode), 9WEEK_OF_YEAR (DateTime), 4WEEK_OF_YEAR_IN (DateTime), 4WEEKDAY0 (DateTime), 4WEEKDAY1 (DateTime), 4whole_word, 10, 10WordBoundaries, 10, 10WRD (CharacterClasses), 3wrd (ClassGroups), 4

YDM (DateTime), 4YDM_IN (DateTime), 4YEAR (DateTime), 4YEAR2 (DateTime), 4YEAR4 (DateTime), 4YI_RADICALS (Unicode), 9yi_radicals (Unicode), 9YI_SYLLABLES (Unicode), 9yi_syllables (Unicode), 9YIJING_HEXAGRAM_SYMBOLS (Unicode), 9yijing_hexagram_symbols (Unicode), 9YIJING_MONO_DI_AND_TRIGRAMS (Unicode), 9yijing_mono_di_and_trigrams (Unicode), 9YMD (DateTime), 4YMD_IN (DateTime), 4

zero_or_more (repeated), 8