unic_ucd_segment::grapheme_cluster_break

Enum GraphemeClusterBreak

pub enum GraphemeClusterBreak {
Show 18 variants    CR,
    LF,
    Control,
    Extend,
    ZWJ,
    RegionalIndicator,
    Prepend,
    SpacingMark,
    L,
    V,
    T,
    LV,
    LVT,
    EBase,
    EModifier,
    GlueAfterZwj,
    EBaseGAZ,
    Other,
}

Expand description

Represents the Unicode character Grapheme_Cluster_Break property.

§References

Variants§

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CR

U+000D CARRIAGE RETURN (CR)

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LF

U+000A LINE FEED (LF)

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Control

General_Category = Line_Separator, or
General_Category = Paragraph_Separator, or
General_Category = Control, or
General_Category = Unassigned and Default_Ignorable_Code_Point, or
General_Category = Surrogate, or
General_Category = Format
and not U+000D CARRIAGE RETURN
and not U+000A LINE FEED
and not U+200C ZERO WIDTH NON-JOINER (ZWNJ)
and not U+200D ZERO WIDTH JOINER (ZWJ)

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Extend

Grapheme_Extend = Yes

This includes:
General_Category = Nonspacing_Mark
General_Category = Enclosing_Mark
U+200C ZERO WIDTH NON-JOINER
plus a few General_Category = Spacing_Mark needed for canonical equivalence.

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ZWJ

U+200D ZERO WIDTH JOINER

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RegionalIndicator

Regional_Indicator = Yes

This consists of the range:

U+1F1E6 REGIONAL INDICATOR SYMBOL LETTER A
..U+1F1FF REGIONAL INDICATOR SYMBOL LETTER Z

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Prepend

Indic_Syllabic_Category = Consonant_Preceding_Repha, or
Indic_Syllabic_Category = Consonant_Prefixed, or
Prepended_Concatenation_Mark = Yes

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SpacingMark

Grapheme_Cluster_Break ≠ Extend, and
General_Category = Spacing_Mark, or
any of the following (which have General_Category = Other_Letter):
U+0E33 ( ำ ) THAI CHARACTER SARA AM
U+0EB3 ( ຳ ) LAO VOWEL SIGN AM

Exceptions: The following (which have General_Category = Spacing_Mark and would otherwise be included) are specifically excluded:

U+102B ( ါ ) MYANMAR VOWEL SIGN TALL AA
U+102C ( ာ ) MYANMAR VOWEL SIGN AA
U+1038 ( း ) MYANMAR SIGN VISARGA
U+1062 ( ၢ ) MYANMAR VOWEL SIGN SGAW KAREN EU
..U+1064 ( ၤ ) MYANMAR TONE MARK SGAW KAREN KE PHO
U+1067 ( ၧ ) MYANMAR VOWEL SIGN WESTERN PWO KAREN EU
..U+106D ( ၭ ) MYANMAR SIGN WESTERN PWO KAREN TONE-5
U+1083 ( ႃ ) MYANMAR VOWEL SIGN SHAN AA
U+1087 ( ႇ ) MYANMAR SIGN SHAN TONE-2
..U+108C ( ႌ ) MYANMAR SIGN SHAN COUNCIL TONE-3
U+108F ( ႏ ) MYANMAR SIGN RUMAI PALAUNG TONE-5
U+109A ( ႚ ) MYANMAR SIGN KHAMTI TONE-1
..U+109C ( ႜ ) MYANMAR VOWEL SIGN AITON A
U+1A61 ( ᩡ ) TAI THAM VOWEL SIGN A
U+1A63 ( ᩣ ) TAI THAM VOWEL SIGN AA
U+1A64 ( ᩤ ) TAI THAM VOWEL SIGN TALL AA
U+AA7B ( ꩻ ) MYANMAR SIGN PAO KAREN TONE
U+AA7D ( ꩽ ) MYANMAR SIGN TAI LAING TONE-5
U+11720 ( 𑜠 ) AHOM VOWEL SIGN A
U+11721 ( 𑜡 ) AHOM VOWEL SIGN AA

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L

Hangul_Syllable_Type=L

Such as:

U+1100 ( ᄀ ) HANGUL CHOSEONG KIYEOK
U+115F ( ᅟ ) HANGUL CHOSEONG FILLER
U+A960 ( ꥠ ) HANGUL CHOSEONG TIKEUT-MIEUM
U+A97C ( ꥼ ) HANGUL CHOSEONG SSANGYEORINHIEUH

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V

Hangul_Syllable_Type=V

Such as:

U+1160 ( ᅠ ) HANGUL JUNGSEONG FILLER
U+11A2 ( ᆢ ) HANGUL JUNGSEONG SSANGARAEA
U+D7B0 ( ힰ ) HANGUL JUNGSEONG O-YEO
U+D7C6 ( ퟆ ) HANGUL JUNGSEONG ARAEA-E

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T

Hangul_Syllable_Type=T

Such as:

U+11A8 ( ᆨ ) HANGUL JONGSEONG KIYEOK
U+11F9 ( ᇹ ) HANGUL JONGSEONG YEORINHIEUH
U+D7CB ( ퟋ ) HANGUL JONGSEONG NIEUN-RIEUL
U+D7FB ( ퟻ ) HANGUL JONGSEONG PHIEUPH-THIEUTH

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LV

Hangul_Syllable_Type=LV:

That is:

U+AC00 ( 가 ) HANGUL SYLLABLE GA
U+AC1C ( 개 ) HANGUL SYLLABLE GAE
U+AC38 ( 갸 ) HANGUL SYLLABLE GYA
...

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LVT

Hangul_Syllable_Type=LVT

That is:

U+AC01 ( 각 ) HANGUL SYLLABLE GAG
U+AC02 ( 갂 ) HANGUL SYLLABLE GAGG
U+AC03 ( 갃 ) HANGUL SYLLABLE GAGS
U+AC04 ( 간 ) HANGUL SYLLABLE GAN
...

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EBase

Emoji characters listed as Emoji_Modifier_Base=Yes in emoji-data.txt, which do not occur after ZWJ in emoji-zwj-sequences.txt.

See https://www.unicode.org/reports/tr51/.

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EModifier

Emoji characters listed as Emoji_Modifer=Yes in emoji-data.txt.

See https://www.unicode.org/reports/tr51/.

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GlueAfterZwj

Emoji characters that do not break from a previous ZWJ in a defined emoji ZWJ sequence, and are not listed as Emoji_Modifier_Base=Yes in emoji-data.txt.

See https://www.unicode.org/reports/tr51/.

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