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#
# Copyright (C) 2016 and later: Unicode, Inc. and others.
# License & terms of use: http://www.unicode.org/copyright.html
# Copyright (C) 2002-2016, International Business Machines Corporation and others.
# All Rights Reserved.
#
# file: char.txt
#
# ICU Character Break Rules
# These rules are based on the Extended Grapheme Cluster rules from
# Unicode UAX #29 Revision 34 for Unicode Version 12.0
!!quoted_literals_only;
#
# Character Class Definitions.
#
$CR = [\p{Grapheme_Cluster_Break = CR}];
$LF = [\p{Grapheme_Cluster_Break = LF}];
$Control = [[\p{Grapheme_Cluster_Break = Control}]];
$Extend = [[\p{Grapheme_Cluster_Break = Extend}]];
$ZWJ = [\p{Grapheme_Cluster_Break = ZWJ}];
$Regional_Indicator = [\p{Grapheme_Cluster_Break = Regional_Indicator}];
$Prepend = [\p{Grapheme_Cluster_Break = Prepend}];
$SpacingMark = [\p{Grapheme_Cluster_Break = SpacingMark}];
#
# From cldr/common/properties/segments/
# and issue CLDR-10994
#
$Virama = [\p{Gujr}\p{sc=Telu}\p{sc=Mlym}\p{sc=Orya}\p{sc=Beng}\p{sc=Deva}&\p{Indic_Syllabic_Category=Virama}];
$LinkingConsonant = [\p{Gujr}\p{sc=Telu}\p{sc=Mlym}\p{sc=Orya}\p{sc=Beng}\p{sc=Deva}&\p{Indic_Syllabic_Category=Consonant}];
$ExtCccZwj = [[\p{gcb=Extend}-\p{ccc=0}] \p{gcb=ZWJ}];
# Korean Syllable Definitions
#
$L = [\p{Grapheme_Cluster_Break = L}];
$V = [\p{Grapheme_Cluster_Break = V}];
$T = [\p{Grapheme_Cluster_Break = T}];
$LV = [\p{Grapheme_Cluster_Break = LV}];
$LVT = [\p{Grapheme_Cluster_Break = LVT}];
# Emoji definitions
$Extended_Pict = [:ExtPict:];
## -------------------------------------------------
!!chain;
!!lookAheadHardBreak;
$CR $LF;
$L ($L | $V | $LV | $LVT);
($LV | $V) ($V | $T);
($LVT | $T) $T;
# GB 9
[^$Control $CR $LF] ($Extend | $ZWJ);
# GB 9a
[^$Control $CR $LF] $SpacingMark;
# GB 9b
$Prepend [^$Control $CR $LF];
# GB 9.3, from CLDR-10994
$LinkingConsonant $ExtCccZwj* $Virama $ExtCccZwj* $LinkingConsonant;
# GB 11 Do not break within emoji modifier sequences or emoji zwj sequences.
$Extended_Pict $Extend* $ZWJ $Extended_Pict;
# GB 12-13. Keep pairs of regional indicators together
# Note that hard break '/' rule triggers only if there are three or more initial RIs,
^$Prepend* $Regional_Indicator $Regional_Indicator / $Regional_Indicator;
^$Prepend* $Regional_Indicator $Regional_Indicator;
# GB 999 Match a single code point if no other rule applies.
.;
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