armenian(lo, hi, char_class = TRUE)
armenian_ligatures(lo, hi, char_class = TRUE)
caucasian_albanian(lo, hi, char_class = TRUE)
cypriot_syllabary(lo, hi, char_class = TRUE)
cyrillic(lo, hi, char_class = TRUE)
cyrillic_supplement(lo, hi, char_class = TRUE)
cyrillic_extended_a(lo, hi, char_class = TRUE)
cyrillic_extended_b(lo, hi, char_class = TRUE)
elbasan(lo, hi, char_class = TRUE)
georgian(lo, hi, char_class = TRUE)
georgian_supplement(lo, hi, char_class = TRUE)
glagolitic(lo, hi, char_class = TRUE)
gothic(lo, hi, char_class = TRUE)
greek_and_coptic(lo, hi, char_class = TRUE)
greek_extended(lo, hi, char_class = TRUE)
latin(lo, hi, char_class = TRUE)
latin_1_supplement(lo, hi, char_class = TRUE)
latin_extended_a(lo, hi, char_class = TRUE)
latin_extended_b(lo, hi, char_class = TRUE)
latin_extended_c(lo, hi, char_class = TRUE)
latin_extended_d(lo, hi, char_class = TRUE)
latin_extended_e(lo, hi, char_class = TRUE)
latin_extended_additional(lo, hi, char_class = TRUE)
latin_ligatures(lo, hi, char_class = TRUE)
linear_a(lo, hi, char_class = TRUE)
linear_b_syllabary(lo, hi, char_class = TRUE)
linear_b_ideograms(lo, hi, char_class = TRUE)
ogham(lo, hi, char_class = TRUE)
old_italic(lo, hi, char_class = TRUE)
old_permic(lo, hi, char_class = TRUE)
phaistos_disc(lo, hi, char_class = TRUE)
runic(lo, hi, char_class = TRUE)
shavian(lo, hi, char_class = TRUE)
duployan(lo, hi, char_class = TRUE)
shorthand_format_controls(lo, hi, char_class = TRUE)
ipa_extensions(lo, hi, char_class = TRUE)
phonetic_extensions(lo, hi, char_class = TRUE)
phonetic_extensions_supplement(lo, hi, char_class = TRUE)
modifier_tone_letters(lo, hi, char_class = TRUE)
spacing_modifier_letters(lo, hi, char_class = TRUE)
superscripts_and_subscripts(lo, hi, char_class = TRUE)
combining_diacritic_marks(lo, hi, char_class = TRUE)
combining_diacritic_supplement(lo, hi, char_class = TRUE)
combining_diacritic_extended(lo, hi, char_class = TRUE)
combining_half_marks(lo, hi, char_class = TRUE)
bamun(lo, hi, char_class = TRUE)
bamun_supplement(lo, hi, char_class = TRUE)
bassa_vah(lo, hi, char_class = TRUE)
coptic(lo, hi, char_class = TRUE)
coptic_epact_numbers(lo, hi, char_class = TRUE)
egyptian_hieroglyphs(lo, hi, char_class = TRUE)
ethiopic(lo, hi, char_class = TRUE)
ethiopic_supplement(lo, hi, char_class = TRUE)
ethiopic_extended(lo, hi, char_class = TRUE)
ethiopic_extended_a(lo, hi, char_class = TRUE)
mende_kikakui(lo, hi, char_class = TRUE)
meroitic_cursive(lo, hi, char_class = TRUE)
meroitic_hieroglyphs(lo, hi, char_class = TRUE)
nko(lo, hi, char_class = TRUE)
osmanya(lo, hi, char_class = TRUE)
tifinagh(lo, hi, char_class = TRUE)
vai(lo, hi, char_class = TRUE)
arabic(lo, hi, char_class = TRUE)
arabic_supplement(lo, hi, char_class = TRUE)
arabic_extended_a(lo, hi, char_class = TRUE)
arabic_presentation_forms_a(lo, hi, char_class = TRUE)
arabic_presentation_forms_b(lo, hi, char_class = TRUE)
imperial_aramaic(lo, hi, char_class = TRUE)
avestan(lo, hi, char_class = TRUE)
carian(lo, hi, char_class = TRUE)
cuneiform(lo, hi, char_class = TRUE)
cuneiform_numbers_and_punctuation(lo, hi, char_class = TRUE)
old_persian(lo, hi, char_class = TRUE)
ugaritic(lo, hi, char_class = TRUE)
hebrew(lo, hi, char_class = TRUE)
lycian(lo, hi, char_class = TRUE)
lydian(lo, hi, char_class = TRUE)
mandaic(lo, hi, char_class = TRUE)
nabataean(lo, hi, char_class = TRUE)
old_north_arabian(lo, hi, char_class = TRUE)
old_south_arabian(lo, hi, char_class = TRUE)
pahlavi_inscriptional(lo, hi, char_class = TRUE)
pahlavi_psalter(lo, hi, char_class = TRUE)
palmyrene(lo, hi, char_class = TRUE)
phoenician(lo, hi, char_class = TRUE)
samaritan(lo, hi, char_class = TRUE)
syriac(lo, hi, char_class = TRUE)
manichaean(lo, hi, char_class = TRUE)
mongolian(lo, hi, char_class = TRUE)
old_turkic(lo, hi, char_class = TRUE)
phags_pa(lo, hi, char_class = TRUE)
tibetan(lo, hi, char_class = TRUE)
bengali_and_assamese(lo, hi, char_class = TRUE)
brahmi(lo, hi, char_class = TRUE)
chakma(lo, hi, char_class = TRUE)
devanagari(lo, hi, char_class = TRUE)
devanagari_extended(lo, hi, char_class = TRUE)
grantha(lo, hi, char_class = TRUE)
gujarati(lo, hi, char_class = TRUE)
gurmukhi(lo, hi, char_class = TRUE)
kaithi(lo, hi, char_class = TRUE)
kannada(lo, hi, char_class = TRUE)
kharoshthi(lo, hi, char_class = TRUE)
khojki(lo, hi, char_class = TRUE)
khudawadi(lo, hi, char_class = TRUE)
lepcha(lo, hi, char_class = TRUE)
limbu(lo, hi, char_class = TRUE)
mahajani(lo, hi, char_class = TRUE)
malayalam(lo, hi, char_class = TRUE)
meetei_mayek(lo, hi, char_class = TRUE)
meetei_mayek_extensions(lo, hi, char_class = TRUE)
modi(lo, hi, char_class = TRUE)
mro(lo, hi, char_class = TRUE)
ol_chiki(lo, hi, char_class = TRUE)
oriya(lo, hi, char_class = TRUE)
saurashtra(lo, hi, char_class = TRUE)
sharada(lo, hi, char_class = TRUE)
siddham(lo, hi, char_class = TRUE)
sinhala(lo, hi, char_class = TRUE)
sinhala_archaic_numbers(lo, hi, char_class = TRUE)
sora_sompeng(lo, hi, char_class = TRUE)
syloti_nagri(lo, hi, char_class = TRUE)
takri(lo, hi, char_class = TRUE)
tamil(lo, hi, char_class = TRUE)
telugu(lo, hi, char_class = TRUE)
thaana(lo, hi, char_class = TRUE)
tirhuta(lo, hi, char_class = TRUE)
vedic_extensions(lo, hi, char_class = TRUE)
warang_citi(lo, hi, char_class = TRUE)
cham(lo, hi, char_class = TRUE)
kayah_li(lo, hi, char_class = TRUE)
khmer(lo, hi, char_class = TRUE)
khmer_symbols(lo, hi, char_class = TRUE)
lao(lo, hi, char_class = TRUE)
myanmar(lo, hi, char_class = TRUE)
myanmar_extended_a(lo, hi, char_class = TRUE)
myanmar_extended_b(lo, hi, char_class = TRUE)
new_tai_lue(lo, hi, char_class = TRUE)
pahawh_hmong(lo, hi, char_class = TRUE)
pau_cin_hau(lo, hi, char_class = TRUE)
tai_le(lo, hi, char_class = TRUE)
tai_tham(lo, hi, char_class = TRUE)
tai_viet(lo, hi, char_class = TRUE)
thai(lo, hi, char_class = TRUE)
balinese(lo, hi, char_class = TRUE)
batak(lo, hi, char_class = TRUE)
buginese(lo, hi, char_class = TRUE)
buhid(lo, hi, char_class = TRUE)
hanunoo(lo, hi, char_class = TRUE)
javanese(lo, hi, char_class = TRUE)
rejang(lo, hi, char_class = TRUE)
sundanese(lo, hi, char_class = TRUE)
sundanese_supplement(lo, hi, char_class = TRUE)
tagalog(lo, hi, char_class = TRUE)
tagbanwa(lo, hi, char_class = TRUE)
bopomofo(lo, hi, char_class = TRUE)
bopomofo_extended(lo, hi, char_class = TRUE)
cjk_unified_ideographs(lo, hi, char_class = TRUE)
cjk_unified_ideographs_extension_a(lo, hi, char_class = TRUE)
cjk_unified_ideographs_extension_b(lo, hi, char_class = TRUE)
cjk_unified_ideographs_extension_c(lo, hi, char_class = TRUE)
cjk_unified_ideographs_extension_d(lo, hi, char_class = TRUE)
cjk_compatibility_ideographs(lo, hi, char_class = TRUE)
cjk_compatibility_ideographs_supplement(lo, hi, char_class = TRUE)
kangxi_radicals(lo, hi, char_class = TRUE)
kangxi_radicals_supplement(lo, hi, char_class = TRUE)
cjk_strokes(lo, hi, char_class = TRUE)
cjk_ideographic_description_characters(lo, hi, char_class = TRUE)
hangul_jamo(lo, hi, char_class = TRUE)
hangul_jamo_extended_a(lo, hi, char_class = TRUE)
hangul_jamo_extended_b(lo, hi, char_class = TRUE)
hangul_compatibility_jamo(lo, hi, char_class = TRUE)
hangul_syllables(lo, hi, char_class = TRUE)
hiragana(lo, hi, char_class = TRUE)
katakana(lo, hi, char_class = TRUE)
katakana_phonetic_extensions(lo, hi, char_class = TRUE)
kana_supplement(lo, hi, char_class = TRUE)
kanbun(lo, hi, char_class = TRUE)
lisu(lo, hi, char_class = TRUE)
miao(lo, hi, char_class = TRUE)
yi_syllables(lo, hi, char_class = TRUE)
yi_radicals(lo, hi, char_class = TRUE)
cherokee(lo, hi, char_class = TRUE)
deseret(lo, hi, char_class = TRUE)
unified_canadian_aboriginal_syllabics(lo, hi, char_class = TRUE)
unified_canadian_aboriginal_syllabics_extended(lo, hi, char_class = TRUE)
alphabetic_presentation_forms(lo, hi, char_class = TRUE)
halfwidth_and_fullwidth_forms(lo, hi, char_class = TRUE)
general_punctuation(lo, hi, char_class = TRUE)
latin_1_punctuation(lo, hi, char_class = TRUE)
small_form_variants(lo, hi, char_class = TRUE)
supplemental_punctuation(lo, hi, char_class = TRUE)
cjk_symbols_and_punctuation(lo, hi, char_class = TRUE)
cjk_compatibility_forms(lo, hi, char_class = TRUE)
fullwidth_ascii_punctuation(lo, hi, char_class = TRUE)
vertical_forms(lo, hi, char_class = TRUE)
letterlike_symbols(lo, hi, char_class = TRUE)
ancient_symbols(lo, hi, char_class = TRUE)
mathematical_alphanumeric_symbols(lo, hi, char_class = TRUE)
arabic_mathematical_alphanumeric_symbols(lo, hi, char_class = TRUE)
enclosed_alphanumerics(lo, hi, char_class = TRUE)
enclosed_alphanumeric_supplement(lo, hi, char_class = TRUE)
enclosed_cjk_letters_and_months(lo, hi, char_class = TRUE)
enclosed_ideographic_supplement(lo, hi, char_class = TRUE)
cjk_compatibility(lo, hi, char_class = TRUE)
miscellaneous_technical(lo, hi, char_class = TRUE)
control_pictures(lo, hi, char_class = TRUE)
optical_character_recognition(lo, hi, char_class = TRUE)
combining_diacritic_marks_for_symbols(lo, hi, char_class = TRUE)
aegean_numbers(lo, hi, char_class = TRUE)
ancient_greek_numbers(lo, hi, char_class = TRUE)
fullwidth_ascii_digits(lo, hi, char_class = TRUE)
common_indic_number_forms(lo, hi, char_class = TRUE)
coptic_epact_numbers(lo, hi, char_class = TRUE)
counting_rod_numerals(lo, hi, char_class = TRUE)
number_forms(lo, hi, char_class = TRUE)
rumi_numeral_symbols(lo, hi, char_class = TRUE)
sinhala_archaic_numbers(lo, hi, char_class = TRUE)
math_arrows(lo, hi, char_class = TRUE)
supplemental_arrows_a(lo, hi, char_class = TRUE)
supplemental_arrows_a(lo, hi, char_class = TRUE)
supplemental_arrows_a(lo, hi, char_class = TRUE)
additional_arrows(lo, hi, char_class = TRUE)
supplemental_mathematical_operators(lo, hi, char_class = TRUE)
miscellaneous_mathematical_symbols_a(lo, hi, char_class = TRUE)
miscellaneous_mathematical_symbols_b(lo, hi, char_class = TRUE)
floors_and_ceilings(lo, hi, char_class = TRUE)
invisible_operators(lo, hi, char_class = TRUE)
geometric_shapes(lo, hi, char_class = TRUE)
box_drawing(lo, hi, char_class = TRUE)
block_elements(lo, hi, char_class = TRUE)
geometric_shapes_extended(lo, hi, char_class = TRUE)
alchemical_symbols(lo, hi, char_class = TRUE)
braille_patterns(lo, hi, char_class = TRUE)
currency_symbols(lo, hi, char_class = TRUE)
dingbats(lo, hi, char_class = TRUE)
ornamental_dingbats(lo, hi, char_class = TRUE)
emoticons(lo, hi, char_class = TRUE)
chess_checkers_draughts(lo, hi, char_class = TRUE)
domino_tiles(lo, hi, char_class = TRUE)
japanese_chess(lo, hi, char_class = TRUE)
mahjong_tiles(lo, hi, char_class = TRUE)
playing_cards(lo, hi, char_class = TRUE)
card_suits(lo, hi, char_class = TRUE)
miscellaneous_symbols_and_pictographs(lo, hi, char_class = TRUE)
musical_symbols(lo, hi, char_class = TRUE)
ancient_greek_musical_notation(lo, hi, char_class = TRUE)
byzantine_musical_symbols(lo, hi, char_class = TRUE)
transport_and_map_symbols(lo, hi, char_class = TRUE)
yijing_mono_di_and_trigrams(lo, hi, char_class = TRUE)
yijing_hexagram_symbols(lo, hi, char_class = TRUE)
tai_xuan_jing_symbols(lo, hi, char_class = TRUE)
specials(lo, hi, char_class = TRUE)
tags(lo, hi, char_class = TRUE)
variation_selectors(lo, hi, char_class = TRUE)
variation_selectors_supplement(lo, hi, char_class = TRUE)
private_use_area(lo, hi, char_class = TRUE)
supplementary_private_use_area_a(lo, hi, char_class = TRUE)
supplementary_private_use_area_b(lo, hi, char_class = TRUE)
ARMENIAN
ARMENIAN_LIGATURES
CAUCASIAN_ALBANIAN
CYPRIOT_SYLLABARY
CYRILLIC
CYRILLIC_SUPPLEMENT
CYRILLIC_EXTENDED_A
CYRILLIC_EXTENDED_B
ELBASAN
GEORGIAN
GEORGIAN_SUPPLEMENT
GLAGOLITIC
GOTHIC
GREEK_AND_COPTIC
GREEK_EXTENDED
LATIN
LATIN_1_SUPPLEMENT
LATIN_EXTENDED_A
LATIN_EXTENDED_B
LATIN_EXTENDED_C
LATIN_EXTENDED_D
LATIN_EXTENDED_E
LATIN_EXTENDED_ADDITIONAL
LATIN_LIGATURES
LINEAR_A
LINEAR_B_SYLLABARY
LINEAR_B_IDEOGRAMS
OGHAM
OLD_ITALIC
OLD_PERMIC
PHAISTOS_DISC
RUNIC
SHAVIAN
DUPLOYAN
SHORTHAND_FORMAT_CONTROLS
IPA_EXTENSIONS
PHONETIC_EXTENSIONS
PHONETIC_EXTENSIONS_SUPPLEMENT
MODIFIER_TONE_LETTERS
SPACING_MODIFIER_LETTERS
SUPERSCRIPTS_AND_SUBSCRIPTS
COMBINING_DIACRITIC_MARKS
COMBINING_DIACRITIC_SUPPLEMENT
COMBINING_DIACRITIC_EXTENDED
COMBINING_HALF_MARKS
BAMUN
BAMUN_SUPPLEMENT
BASSA_VAH
COPTIC
COPTIC_EPACT_NUMBERS
EGYPTIAN_HIEROGLYPHS
ETHIOPIC
ETHIOPIC_SUPPLEMENT
ETHIOPIC_EXTENDED
ETHIOPIC_EXTENDED_A
MENDE_KIKAKUI
MEROITIC_CURSIVE
MEROITIC_HIEROGLYPHS
NKO
OSMANYA
TIFINAGH
VAI
ARABIC
ARABIC_SUPPLEMENT
ARABIC_EXTENDED_A
ARABIC_PRESENTATION_FORMS_A
ARABIC_PRESENTATION_FORMS_B
IMPERIAL_ARAMAIC
AVESTAN
CARIAN
CUNEIFORM
CUNEIFORM_NUMBERS_AND_PUNCTUATION
OLD_PERSIAN
UGARITIC
HEBREW
LYCIAN
LYDIAN
MANDAIC
NABATAEAN
OLD_NORTH_ARABIAN
OLD_SOUTH_ARABIAN
PAHLAVI_INSCRIPTIONAL
PAHLAVI_PSALTER
PALMYRENE
PHOENICIAN
SAMARITAN
SYRIAC
MANICHAEAN
MONGOLIAN
OLD_TURKIC
PHAGS_PA
TIBETAN
BENGALI_AND_ASSAMESE
BRAHMI
CHAKMA
DEVANAGARI
DEVANAGARI_EXTENDED
GRANTHA
GUJARATI
GURMUKHI
KAITHI
KANNADA
KHAROSHTHI
KHOJKI
KHUDAWADI
LEPCHA
LIMBU
MAHAJANI
MALAYALAM
MEETEI_MAYEK
MEETEI_MAYEK_EXTENSIONS
MODI
MRO
OL_CHIKI
ORIYA
SAURASHTRA
SHARADA
SIDDHAM
SINHALA
SINHALA_ARCHAIC_NUMBERS
SORA_SOMPENG
SYLOTI_NAGRI
TAKRI
TAMIL
TELUGU
THAANA
TIRHUTA
VEDIC_EXTENSIONS
WARANG_CITI
CHAM
KAYAH_LI
KHMER
KHMER_SYMBOLS
LAO
MYANMAR
MYANMAR_EXTENDED_A
MYANMAR_EXTENDED_B
NEW_TAI_LUE
PAHAWH_HMONG
PAU_CIN_HAU
TAI_LE
TAI_THAM
TAI_VIET
THAI
BALINESE
BATAK
BUGINESE
BUHID
HANUNOO
JAVANESE
REJANG
SUNDANESE
SUNDANESE_SUPPLEMENT
TAGALOG
TAGBANWA
BOPOMOFO
BOPOMOFO_EXTENDED
CJK_UNIFIED_IDEOGRAPHS
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_C
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_D
CJK_COMPATIBILITY_IDEOGRAPHS
CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT
KANGXI_RADICALS
KANGXI_RADICALS_SUPPLEMENT
CJK_STROKES
CJK_IDEOGRAPHIC_DESCRIPTION_CHARACTERS
HANGUL_JAMO
HANGUL_JAMO_EXTENDED_A
HANGUL_JAMO_EXTENDED_B
HANGUL_COMPATIBILITY_JAMO
HANGUL_SYLLABLES
HIRAGANA
KATAKANA
KATAKANA_PHONETIC_EXTENSIONS
KANA_SUPPLEMENT
KANBUN
LISU
MIAO
YI_SYLLABLES
YI_RADICALS
CHEROKEE
DESERET
UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS
UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED
ALPHABETIC_PRESENTATION_FORMS
HALFWIDTH_AND_FULLWIDTH_FORMS
GENERAL_PUNCTUATION
LATIN_1_PUNCTUATION
SMALL_FORM_VARIANTS
SUPPLEMENTAL_PUNCTUATION
CJK_SYMBOLS_AND_PUNCTUATION
CJK_COMPATIBILITY_FORMS
FULLWIDTH_ASCII_PUNCTUATION
VERTICAL_FORMS
LETTERLIKE_SYMBOLS
ANCIENT_SYMBOLS
MATHEMATICAL_ALPHANUMERIC_SYMBOLS
ARABIC_MATHEMATICAL_ALPHANUMERIC_SYMBOLS
ENCLOSED_ALPHANUMERICS
ENCLOSED_ALPHANUMERIC_SUPPLEMENT
ENCLOSED_CJK_LETTERS_AND_MONTHS
ENCLOSED_IDEOGRAPHIC_SUPPLEMENT
CJK_COMPATIBILITY
MISCELLANEOUS_TECHNICAL
CONTROL_PICTURES
OPTICAL_CHARACTER_RECOGNITION
COMBINING_DIACRITIC_MARKS_FOR_SYMBOLS
AEGEAN_NUMBERS
ANCIENT_GREEK_NUMBERS
FULLWIDTH_ASCII_DIGITS
COMMON_INDIC_NUMBER_FORMS
COPTIC_EPACT_NUMBERS
COUNTING_ROD_NUMERALS
NUMBER_FORMS
RUMI_NUMERAL_SYMBOLS
SINHALA_ARCHAIC_NUMBERS
MATH_ARROWS
SUPPLEMENTAL_ARROWS_A
SUPPLEMENTAL_ARROWS_A
SUPPLEMENTAL_ARROWS_A
ADDITIONAL_ARROWS
SUPPLEMENTAL_MATHEMATICAL_OPERATORS
MISCELLANEOUS_MATHEMATICAL_SYMBOLS_A
MISCELLANEOUS_MATHEMATICAL_SYMBOLS_B
FLOORS_AND_CEILINGS
INVISIBLE_OPERATORS
GEOMETRIC_SHAPES
BOX_DRAWING
BLOCK_ELEMENTS
GEOMETRIC_SHAPES_EXTENDED
ALCHEMICAL_SYMBOLS
BRAILLE_PATTERNS
CURRENCY_SYMBOLS
DINGBATS
ORNAMENTAL_DINGBATS
EMOTICONS
CHESS_CHECKERS_DRAUGHTS
DOMINO_TILES
JAPANESE_CHESS
MAHJONG_TILES
PLAYING_CARDS
CARD_SUITS
MISCELLANEOUS_SYMBOLS_AND_PICTOGRAPHS
MUSICAL_SYMBOLS
ANCIENT_GREEK_MUSICAL_NOTATION
BYZANTINE_MUSICAL_SYMBOLS
TRANSPORT_AND_MAP_SYMBOLS
YIJING_MONO_DI_AND_TRIGRAMS
YIJING_HEXAGRAM_SYMBOLS
TAI_XUAN_JING_SYMBOLS
SPECIALS
TAGS
VARIATION_SELECTORS
VARIATION_SELECTORS_SUPPLEMENT
PRIVATE_USE_AREA
SUPPLEMENTARY_PRIVATE_USE_AREA_A
SUPPLEMENTARY_PRIVATE_USE_AREA_BTRUE or FALSE. Should the values be wrapped
into a character class?regex (inherits from character) of length 1.ClassGroups
# Classes
latin()
greek_and_coptic()
cyrillic()
arabic()
# With repetition
hebrew(3, 6)
hiragana(1, Inf)
katakana(0, Inf)
# Without a class wrapper
cjk_unified_ideographs(char_class = FALSE)
# Constants
ARMENIAN
LINEAR_B_IDEOGRAMS
DUPLOYAN
OSMANYA
## Not run:
# # All the Unicode characer classes
# # Not run, since it generates lots of output
# setdiff(
# ls("package:rebus.unicode", pattern = lower()),
# ls(
# "package:rebus.unicode",
# pattern = START %R% case_insensitive(or("up", "ugc", "unicode")))
# )
# ## End(Not run)
# Usage
pythag <- "\u03b1^2 + \u03b2^2 = \u03b3^2"
stringi::stri_extract_all_regex(pythag, greek_and_coptic())
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