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Issue 2440913002: Update ICU to 58.1
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Index: source/data/brkitr/rules/line_loose_cj.txt
diff --git a/source/data/brkitr/line_loose_cj.txt b/source/data/brkitr/rules/line_loose_cj.txt
similarity index 51%
rename from source/data/brkitr/line_loose_cj.txt
rename to source/data/brkitr/rules/line_loose_cj.txt
index 9934fe3aa1d077407f538b8d3ba6a649fdf7622d..9b781f875a6dedad5e3e3e8f9b0c282b6f68372f 100644
--- a/source/data/brkitr/line_loose_cj.txt
+++ b/source/data/brkitr/rules/line_loose_cj.txt
@@ -1,13 +1,19 @@
-# Copyright (c) 2002-2015 International Business Machines Corporation and
+# 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: line_loose_cj.txt
#
# Line Breaking Rules
-# Implement default line breaking as defined by
-# Unicode Standard Annex #14 Revision 34 for Unicode 8.0
+# Implement default line breaking as defined by
+# Unicode Standard Annex #14 Revision 37 for Unicode 9.0
# http://www.unicode.org/reports/tr14/
-# tailored as noted in 2nd paragraph below..
+#
+# Includes extensions to the handling of emoji ZWJ sequences from
+# https://goo.gl/cluFCn
+#
+# tailored as noted in 2nd paragraph below.
#
# TODO: Rule LB 8 remains as it was in Unicode 5.2
# This is only because of a limitation of ICU break engine implementation,
@@ -33,44 +39,6 @@
#
!!chain;
-!!LBCMNoChain;
-
-
-!!lookAheadHardBreak;
-#
-# !!lookAheadHardBreak Described here because it is (as yet) undocumented elsewhere
-# and only used for the line break rules.
-#
-# It is used in the implementation of rule LB 10
-# which says to treat any combining mark that is not attached to a base
-# character as if it were of class AL (alphabetic).
-#
-# The problem occurs in the reverse rules.
-#
-# Consider a sequence like, with correct breaks as shown
-# LF ID CM AL AL
-# ^ ^ ^
-# Then consider the sequence without the initial ID (ideographic)
-# LF CM AL AL
-# ^ ^
-# Our CM, which in the first example was attached to the ideograph,
-# is now unattached, becomes an alpha, and joins in with the other
-# alphas.
-#
-# When iterating forwards, these sequences do not present any problems
-# When iterating backwards, we need to look ahead when encountering
-# a CM to see whether it attaches to something further on or not.
-# (Look-ahead in a reverse rule is looking towards the start)
-#
-# If the CM is unattached, we need to force a break.
-#
-# !!lookAheadHardBreak forces the run time state machine to
-# stop immediately when a look ahead rule ( '/' operator) matches,
-# and set the match position to that of the look-ahead operator,
-# no matter what other rules may be in play at the time.
-#
-# See rule LB 19 for an example.
-#
$AI = [:LineBreak = Ambiguous:];
$AL = [:LineBreak = Alphabetic:];
@@ -82,9 +50,11 @@ $B2 = [:LineBreak = Break_Both:];
$CB = [:LineBreak = Contingent_Break:];
$CJ = [:LineBreak = Conditional_Japanese_Starter:];
$CL = [:LineBreak = Close_Punctuation:];
-$CM = [:LineBreak = Combining_Mark:];
+# $CM = [:LineBreak = Combining_Mark:];
$CP = [:LineBreak = Close_Parenthesis:];
$CR = [:LineBreak = Carriage_Return:];
+$EB = [[:LineBreak = EB:]\U0001F3C2\U0001F3C7\U0001F3CC\U0001F46A-\U0001F46D\U0001F46F\U0001F574\U0001F6CC];
+$EM = [:LineBreak = EM:];
$EXX = [\uFF01 \uFF1F];
$EX = [[:LineBreak = Exclamation:] - $EXX];
$GL = [:LineBreak = Glue:];
@@ -92,6 +62,7 @@ $HL = [:LineBreak = Hebrew_Letter:];
$HY = [:LineBreak = Hyphen:];
$H2 = [:LineBreak = H2:];
$H3 = [:LineBreak = H3:];
+# CSS Loose tailoring: CJ resolves to ID
$ID = [[:LineBreak = Ideographic:] $CJ];
$IN = [:LineBreak = Inseperable:];
$IS = [:LineBreak = Infix_Numeric:];
@@ -117,100 +88,38 @@ $SY = [:LineBreak = Break_Symbols:];
$WJ = [:LineBreak = Word_Joiner:];
$XX = [:LineBreak = Unknown:];
$ZW = [:LineBreak = ZWSpace:];
+$ZWJ = [:LineBreak = ZWJ:];
+
+$EmojiNRK = [[\p{Emoji}] - [$RI \u002a\u00230-9©®™〰〽]];
+# Data for Extended Pictographic scraped from CLDR common/properties/ExtendedPictographic.txt, r12773
+$Extended_Pict = [\U0001F774-\U0001F77F\u2700-\u2701\u2703-\u2704\u270E\u2710-\u2711\u2765-\u2767\U0001F030-\U0001F093\U0001F094-\U0001F09F\U0001F10D-\U0001F10F\U0001F12F\U0001F16C-\U0001F16F\U0001F1AD-\U0001F1E5\U0001F203-\U0001F20F\U0001F23C-\U0001F23F\U0001F249-\U0001F24F\U0001F252-\U0001F2FF\U0001F7D5-\U0001F7FF\U0001F000-\U0001F003\U0001F005-\U0001F02B\U0001F02C-\U0001F02F\U0001F322-\U0001F323\U0001F394-\U0001F395\U0001F398\U0001F39C-\U0001F39D\U0001F3F1-\U0001F3F2\U0001F3F6\U0001F4FE\U0001F53E-\U0001F548\U0001F54F\U0001F568-\U0001F56E\U0001F571-\U0001F572\U0001F57B-\U0001F586\U0001F588-\U0001F589\U0001F58E-\U0001F58F\U0001F591-\U0001F594\U0001F597-\U0001F5A3\U0001F5A6-\U0001F5A7\U0001F5A9-\U0001F5B0\U0001F5B3-\U0001F5BB\U0001F5BD-\U0001F5C1\U0001F5C5-\U0001F5D0\U0001F5D4-\U0001F5DB\U0001F5DF-\U0001F5E0\U0001F5E2\U0001F5E4-\U0001F5E7\U0001F5E9-\U0001F5EE\U0001F5F0-\U0001F5F2\U0001F5F4-\U0001F5F9\u2605\u2607-\u260D\u260F-\u2610\u2612\u2616-\u2617\u2619-\u261C\u261E-\u261F\u2621\u2624-\u2625\u2627-\u2629\u262B-\u262D\u2630-\u2637\u263B-\u2647\u2654-\u265F\u2661-\u2662\u2664\u2667\u2669-\u267A\u267C-\u267E\u2680-\u2691\u2695\u2698\u269A\u269D-\u269F\u26A2-\u26A9\u26AC-\u26AF\u26B2-\u26BC\u26BF-\u26C3\u26C6-\u26C7\u26C9-\u26CD\u26D0\u26D2\u26D5-\u26E8\u26EB-\u26EF\u26F6\u26FB-\u26FC\u26FE-\u26FF\u2388\U0001FA00-\U0001FFFD\U0001F0A0-\U0001F0AE\U0001F0B1-\U0001F0BF\U0001F0C1-\U0001F0CF\U0001F0D1-\U0001F0F5\U0001F0AF-\U0001F0B0\U0001F0C0\U0001F0D0\U0001F0F6-\U0001F0FF\U0001F80C-\U0001F80F\U0001F848-\U0001F84F\U0001F85A-\U0001F85F\U0001F888-\U0001F88F\U0001F8AE-\U0001F8FF\U0001F900-\U0001F90F\U0001F91F\U0001F928-\U0001F92F\U0001F931-\U0001F932\U0001F93F\U0001F94C-\U0001F94F\U0001F95F-\U0001F97F\U0001F992-\U0001F9BF\U0001F9C1-\U0001F9FF\U0001F6C6-\U0001F6CA\U0001F6E6-\U0001F6E8\U0001F6EA\U0001F6F1-\U0001F6F2\U0001F6D3-\U0001F6DF\U0001F6ED-\U0001F6EF\U0001F6F7-\U0001F6FF];
+
+# By LB9, a ZWJ also behaves as a CM. Including it in the definition of CM avoids having to explicitly
+# list it in the numerous rules that use CM.
+# By LB1, SA characters with general categor of Mn or Mc also resolve to CM.
+
+$CM = [[:LineBreak = Combining_Mark:] $ZWJ [$SA & [[:Mn:][:Mc:]]]];
# Dictionary character set, for triggering language-based break engines. Currently
-# limited to LineBreak=Complex_Context. Note that this set only works in Unicode
-# 5.0 or later as the definition of Complex_Context was corrected to include all
-# characters requiring dictionary break.
+# limited to LineBreak=Complex_Context (SA).
-$dictionary = [:LineBreak = Complex_Context:];
+$dictionary = [$SA];
#
# Rule LB1. By default, treat AI (characters with ambiguous east Asian width),
-# SA (South East Asian: Thai, Lao, Khmer)
+# SA (Dictionary chars, excluding Mn and Mc)
# SG (Unpaired Surrogates)
# XX (Unknown, unassigned)
# as $AL (Alphabetic)
#
-$ALPlus = [$AL $AI $SA $SG $XX];
-
-#
-# Combining Marks. X $CM* behaves as if it were X. Rule LB6.
-#
-$ALcm = $ALPlus $CM*;
-$BAcm = $BA $CM*;
-$BAXcm = $BAX $CM*;
-$BBcm = $BB $CM*;
-$B2cm = $B2 $CM*;
-$CLcm = $CL $CM*;
-$CPcm = $CP $CM*;
-$EXcm = $EX $CM*;
-$EXXcm = $EXX $CM*;
-$GLcm = $GL $CM*;
-$HLcm = $HL $CM*;
-$HYcm = $HY $CM*;
-$H2cm = $H2 $CM*;
-$H3cm = $H3 $CM*;
-$IDcm = $ID $CM*;
-$INcm = $IN $CM*;
-$IScm = $IS $CM*;
-$JLcm = $JL $CM*;
-$JVcm = $JV $CM*;
-$JTcm = $JT $CM*;
-$NScm = $NS $CM*;
-$NSXcm = $NSX $CM*;
-$NUcm = $NU $CM*;
-$OPcm = $OP $CM*;
-$POcm = $PO $CM*;
-$POXcm = $POX $CM*;
-$PRcm = $PR $CM*;
-$PRXcm = $PRX $CM*;
-$QUcm = $QU $CM*;
-$RIcm = $RI $CM*;
-$SYcm = $SY $CM*;
-$WJcm = $WJ $CM*;
+$ALPlus = [$AL $AI $SG $XX [$SA-[[:Mn:][:Mc:]]]];
+
## -------------------------------------------------
!!forward;
#
-# Each class of character can stand by itself as an unbroken token, with trailing combining stuff
-#
-$ALPlus $CM+;
-$BA $CM+;
-$BAX $CM+;
-$BB $CM+;
-$B2 $CM+;
-$CL $CM+;
-$CP $CM+;
-$EX $CM+;
-$EXX $CM+;
-$GL $CM+;
-$HL $CM+;
-$HY $CM+;
-$H2 $CM+;
-$H3 $CM+;
-$ID $CM+;
-$IN $CM+;
-$IS $CM+;
-$JL $CM+;
-$JV $CM+;
-$JT $CM+;
-$NS $CM+;
-$NSX $CM+;
-$NU $CM+;
-$OP $CM+;
-$PO $CM+;
-$POX $CM+;
-$PR $CM+;
-$PRX $CM+;
-$QU $CM+;
-$RI $CM+;
-$SY $CM+;
-$WJ $CM+;
-
-#
# CAN_CM is the set of characters that may combine with CM combining chars.
# Note that Linebreak UAX 14's concept of a combining char and the rules
# for what they can combine with are _very_ different from the rest of Unicode.
@@ -224,19 +133,15 @@ $CANT_CM = [ $SP $BK $CR $LF $NL $ZW $CM]; # Bases that can't take CMs
#
# AL_FOLLOW set of chars that can unconditionally follow an AL
# Needed in rules where stand-alone $CM s are treated as AL.
-# Chaining is disabled with CM because it causes other failures,
-# so for this one case we need to manually list out longer sequences.
#
-$AL_FOLLOW_NOCM = [$BK $CR $LF $NL $ZW $SP];
-$AL_FOLLOW_CM = [$CL $CP $EX $HL $IS $SY $WJ $GL $OP $QU $BA $HY $NS $IN $NU $ALPlus];
-$AL_FOLLOW = [$AL_FOLLOW_NOCM $AL_FOLLOW_CM];
+$AL_FOLLOW = [$BK $CR $LF $NL $ZW $SP $CL $CP $EX $HL $IS $SY $WJ $GL $OP $QU $BA $HY $NS $IN $NU $PR $PO $POX $ALPlus];
#
# Rule LB 4, 5 Mandatory (Hard) breaks.
#
$LB4Breaks = [$BK $CR $LF $NL];
-$LB4NonBreaks = [^$BK $CR $LF $NL];
+$LB4NonBreaks = [^$BK $CR $LF $NL $CM];
$CR $LF {100};
#
@@ -244,13 +149,13 @@ $CR $LF {100};
#
$LB4NonBreaks? $LB4Breaks {100}; # LB 5 do not break before hard breaks.
$CAN_CM $CM* $LB4Breaks {100};
-$CM+ $LB4Breaks {100};
+^$CM+ $LB4Breaks {100};
# LB 7 x SP
# x ZW
$LB4NonBreaks [$SP $ZW];
$CAN_CM $CM* [$SP $ZW];
-$CM+ [$SP $ZW];
+^$CM+ [$SP $ZW];
#
# LB 8 Break after zero width space
@@ -261,38 +166,38 @@ $CM+ [$SP $ZW];
$LB8Breaks = [$LB4Breaks $ZW];
$LB8NonBreaks = [[$LB4NonBreaks] - [$ZW]];
+# LB 8a ZWJ x (ID | Extended_Pict | EmojiNRK) Emoji ZWJ sequences.
+#
+$ZWJ ($ID | $Extended_Pict | $EmojiNRK);
-# LB 9 Combining marks. X $CM needs to behave like X, where X is not $SP, $BK $CR $LF $NL
-# $CM not covered by the above needs to behave like $AL
+# LB 9 Combining marks. X $CM needs to behave like X, where X is not $SP, $BK $CR $LF $NL
+# $CM not covered by the above needs to behave like $AL
# See definition of $CAN_CM.
$CAN_CM $CM+; # Stick together any combining sequences that don't match other rules.
-$CM+;
+^$CM+;
#
# LB 11 Do not break before or after WORD JOINER & related characters.
#
-$CAN_CM $CM* $WJcm;
-$LB8NonBreaks $WJcm;
-$CM+ $WJcm;
+$CAN_CM $CM* $WJ;
+$LB8NonBreaks $WJ;
+^$CM+ $WJ;
-$WJcm $CANT_CM;
-$WJcm $CAN_CM $CM*;
+$WJ $CM* .;
#
# LB 12 Do not break after NBSP and related characters.
# GL x
#
-$GLcm $CAN_CM $CM*;
-$GLcm $CANT_CM;
-
+$GL $CM* .;
+
#
# LB 12a Do not break before NBSP and related characters ...
# [^SP BA HY] x GL
#
-[[$LB8NonBreaks] - [$SP $BA $BAX $HY]] $CM* $GLcm;
-$CM+ GLcm;
-
+[[$LB8NonBreaks] - [$SP $BA $BAX $HY]] $CM* $GL;
+^$CM+ $GL;
#
@@ -301,43 +206,43 @@ $CM+ GLcm;
# Do not include $EXX here
$LB8NonBreaks $CL;
$CAN_CM $CM* $CL;
-$CM+ $CL; # by rule 10, stand-alone CM behaves as AL
+^$CM+ $CL; # by rule 10, stand-alone CM behaves as AL
$LB8NonBreaks $CP;
$CAN_CM $CM* $CP;
-$CM+ $CP; # by rule 10, stand-alone CM behaves as AL
+^$CM+ $CP; # by rule 10, stand-alone CM behaves as AL
$LB8NonBreaks $EX;
$CAN_CM $CM* $EX;
-$CM+ $EX; # by rule 10, stand-alone CM behaves as AL
+^$CM+ $EX; # by rule 10, stand-alone CM behaves as AL
$LB8NonBreaks $IS;
$CAN_CM $CM* $IS;
-$CM+ $IS; # by rule 10, stand-alone CM behaves as AL
+^$CM+ $IS; # by rule 10, stand-alone CM behaves as AL
$LB8NonBreaks $SY;
$CAN_CM $CM* $SY;
-$CM+ $SY; # by rule 10, stand-alone CM behaves as AL
+^$CM+ $SY; # by rule 10, stand-alone CM behaves as AL
#
# LB 14 Do not break after OP, even after spaces
#
-$OPcm $SP* $CAN_CM $CM*;
-$OPcm $SP* $CANT_CM;
+$OP $CM* $SP* .;
-$OPcm $SP+ $CM+ $AL_FOLLOW?; # by rule 10, stand-alone CM behaves as AL
+$OP $CM* $SP+ $CM+ $AL_FOLLOW?; # by rule 10, stand-alone CM behaves as AL
+ # by rule 8, CM following a SP is stand-alone.
# LB 15
-$QUcm $SP* $OPcm;
+$QU $CM* $SP* $OP;
# LB 16
# Do not break between closing punctuation and $NS, even with intervening spaces
# But DO allow a break between closing punctuation and $NSX, don't include it here
-($CLcm | $CPcm) $SP* $NScm;
+($CL | $CP) $CM* $SP* $NS;
# LB 17
-$B2cm $SP* $B2cm;
+$B2 $CM* $SP* $B2;
#
# LB 18 Break after spaces.
@@ -348,13 +253,11 @@ $LB18Breaks = [$LB8Breaks $SP];
# LB 19
# x QU
-$LB18NonBreaks $CM* $QUcm;
-$CM+ $QUcm;
+$LB18NonBreaks $CM* $QU;
+^$CM+ $QU;
# QU x
-$QUcm .?;
-$QUcm $LB18NonBreaks $CM*; # Don't let a combining mark go onto $CR, $BK, etc.
- # TODO: I don't think this rule is needed.
+$QU $CM* .;
# LB 20
@@ -366,81 +269,96 @@ $LB20NonBreaks = [$LB18NonBreaks - $CB];
# LB 21 x (BA | HY | NS)
# BB x
#
-# DO allow breaks here before $BAXcm and $NSXcm, so don't include them
-$LB20NonBreaks $CM* ($BAcm | $HYcm | $NScm);
+# DO allow breaks here before $BAX and $NSX, so don't include them
+$LB20NonBreaks $CM* ($BA | $HY | $NS);
+^$CM+ ($BA | $HY | $NS);
-$BBcm [^$CB]; # $BB x
-$BBcm $LB20NonBreaks $CM*;
+$BB $CM* [^$CB]; # $BB x
+$BB $CM* $LB20NonBreaks;
# LB 21a Don't break after Hebrew + Hyphen
# HL (HY | BA) x
-#
-$HLcm ($HYcm | $BAcm | $BAXcm) [^$CB]?;
+#
+$HL $CM* ($HY | $BA | $BAX) $CM* [^$CB]?;
# LB 21b (forward) Don't break between SY and HL
# (break between HL and SY already disallowed by LB 13 above)
-$SYcm $HLcm;
+$SY $CM* $HL;
# LB 22
-($ALcm | $HLcm) $INcm;
-$CM+ $INcm; # by rule 10, any otherwise unattached CM behaves as AL
-$EXcm $INcm;
-$IDcm $INcm;
-# $INcm $INcm; # delete this rule for CSS loose
-$NUcm $INcm;
+($ALPlus | $HL) $CM* $IN;
+^$CM+ $IN; # by rule 10, any otherwise unattached CM behaves as AL
+$EX $CM* $IN;
+($ID | $EB | $EM) $CM* $IN;
+# $IN $CM* $IN; # delete this rule for CSS loose
+$NU $CM* $IN;
-# LB 23
+# $LB 23
+#
+($ALPlus | $HL) $CM* $NU;
+^$CM+ $NU; # Rule 10, any otherwise unattached CM behaves as AL
+$NU $CM* ($ALPlus | $HL);
+
+# LB 23a
# Do not include $POX here
-$IDcm $POcm;
-$ALcm $NUcm; # includes $LB19
-$HLcm $NUcm;
-$CM+ $NUcm; # Rule 10, any otherwise unattached CM behaves as AL
-$NUcm $ALcm;
-$NUcm $HLcm;
+#
+$PR $CM* ($ID | $EB | $EM);
+($ID | $EB | $EM) $CM* $PO;
+
#
# LB 24
#
# Do not include $PRX here
-$PRcm $IDcm;
-$PRcm ($ALcm | $HLcm);
-($POcm | $POXcm) ($ALcm | $HLcm);
+($PR | $PO | $POX) $CM* ($ALPlus | $HL);
+($ALPlus | $HL) $CM* ($PR | $PO | $POX); # TODO: should this be ($PR | $PRX | $PO)
+^$CM+ ($PR | $PO | $POX); # Rule 10, any otherwise unattached CM behaves as AL
#
# LB 25 Numbers.
#
# Here do not include $PRX at the beginning or $POX at the end
-($PRcm | $POcm | $POXcm)? ($OPcm | $HYcm)? $NUcm ($NUcm | $SYcm | $IScm)* ($CLcm | $CPcm)? ($PRcm | $PRXcm | $POcm)?;
+(($PR | $PO | $POX) $CM*)? (($OP | $HY) $CM*)? $NU ($CM* ($NU | $SY | $IS))*
+ ($CM* ($CL | $CP))? ($CM* ($PR | $PRX | $PO))?;
# LB 26 Do not break a Korean syllable
#
-$JLcm ($JLcm | $JVcm | $H2cm | $H3cm);
-($JVcm | $H2cm) ($JVcm | $JTcm);
-($JTcm | $H3cm) $JTcm;
+$JL $CM* ($JL | $JV | $H2 | $H3);
+($JV | $H2) $CM* ($JV | $JT);
+($JT | $H3) $CM* $JT;
# LB 27 Treat korean Syllable Block the same as ID (don't break it)
# Do not include $POX or $PRX here
-($JLcm | $JVcm | $JTcm | $H2cm | $H3cm) $INcm;
-($JLcm | $JVcm | $JTcm | $H2cm | $H3cm) $POcm;
-$PRcm ($JLcm | $JVcm | $JTcm | $H2cm | $H3cm);
+($JL | $JV | $JT | $H2 | $H3) $CM* $IN;
+($JL | $JV | $JT | $H2 | $H3) $CM* $PO;
+$PR $CM* ($JL | $JV | $JT | $H2 | $H3);
# LB 28 Do not break between alphabetics
#
-($ALcm | $HLcm) ($ALcm | $HLcm);
-$CM+ ($ALcm | $HLcm); # The $CM+ is from rule 10, an unattached CM is treated as AL
+($ALPlus | $HL) $CM* ($ALPlus | $HL);
+^$CM+ ($ALPlus | $HL); # The $CM+ is from rule 10, an unattached CM is treated as AL
# LB 29
-$IScm ($ALcm | $HLcm);
+$IS $CM* ($ALPlus | $HL);
# LB 30
-($ALcm | $HLcm | $NUcm) $OPcm;
-$CM+ $OPcm; # The $CM+ is from rule 10, an unattached CM is treated as AL.
-$CPcm ($ALcm | $HLcm | $NUcm);
+($ALPlus | $HL | $NU) $CM* $OP;
+^$CM+ $OP; # The $CM+ is from rule 10, an unattached CM is treated as AL.
+$CP $CM* ($ALPlus | $HL | $NU);
+
+# LB 30a Do not break between regional indicators. Break after pairs of them.
+# Tricky interaction with LB8a: ZWJ x ID
+$RI $CM* $RI / [[^$BK $CR $LF $NL $SP $ZW $WJ $CL $CP $EX $IS $SY $GL $QU $BA $HY $NS $CM] {eof}];
+$RI $CM* $RI $CM* $ZWJ / [[^$BK $CR $LF $NL $SP $ZW $WJ $CL $CP $EX $IS $SY $GL $QU $BA $HY $NS $CM $ID $Extended_Pict $EmojiNRK] {eof}];
+$RI $CM* $RI $CM* [$CM-$ZWJ] / [[^$BK $CR $LF $NL $SP $ZW $WJ $CL $CP $EX $IS $SY $GL $QU $BA $HY $NS $CM] {eof}];
+
+$RI $CM* $RI $CM* [$BK $CR $LF $NL $SP $ZW $WJ $CL $CP $EX $IS $SY $GL $QU $BA $HY $NS {eof}];
+$RI $CM* $RI $CM* $ZWJ ($ID | $Extended_Pict | $EmojiNRK);
-# LB 30a Do not break between regional indicators.
-$RIcm $RIcm;
+# LB 30b Do not break between an Emoji Base and an Emoji Modifier
+$EB $CM* $EM;
#
# Reverse Rules.
@@ -449,40 +367,10 @@ $RIcm $RIcm;
!!reverse;
-$CM+ $ALPlus;
-$CM+ $BA;
-$CM+ $BAX;
-$CM+ $BB;
-$CM+ $B2;
-$CM+ $CL;
-$CM+ $CP;
-$CM+ $EX;
-$CM+ $EXX;
-$CM+ $GL;
-$CM+ $HL;
-$CM+ $HY;
-$CM+ $H2;
-$CM+ $H3;
-$CM+ $ID;
-$CM+ $IN;
-$CM+ $IS;
-$CM+ $JL;
-$CM+ $JV;
-$CM+ $JT;
-$CM+ $NS;
-$CM+ $NSX;
-$CM+ $NU;
-$CM+ $OP;
-$CM+ $PO;
-$CM+ $POX;
-$CM+ $PR;
-$CM+ $PRX;
-$CM+ $QU;
-$CM+ $RI;
-$CM+ $SY;
-$CM+ $WJ;
-$CM+;
+# LB 9 Combining Marks.
+# Stick together any combining sequences that don't match other rules.
+^$CM+ $CAN_CM?;
#
# Sequences of the form (shown forwards)
@@ -493,26 +381,16 @@ $AL_FOLLOW $CM+ / (
[$BK $CR $LF $NL $ZW {eof}] |
$SP+ $CM+ $SP |
$SP+ $CM* ([^$OP $CM $SP] | [$AL {eof}])); # if LB 14 will match, need to surpress this break.
- # LB14 says OP SP* x .
+ # LB14 says OP SP* x .
# becomes OP SP* x AL
# becomes OP SP* x CM+ AL_FOLLOW
#
# Further note: the $AL in [$AL {eof}] is only to work around
# a rule compiler bug which complains about
# empty sets otherwise.
-
-#
-# Sequences of the form (shown forwards)
-# [CANT_CM] <break> [CM] <break> [PR]
-# The CM needs to behave as an AL
-# This rule is concerned about getting the second of the two <breaks> in place.
-#
-
-[$PR $PRX ] / $CM+ [$BK $CR $LF $NL $ZW $SP {eof}];
-
-# LB 4, 5, 5
+# LB 4, 5, 6
$LB4Breaks [$LB4NonBreaks-$CM];
$LB4Breaks $CM+ $CAN_CM;
@@ -529,30 +407,36 @@ $LF $CR;
# Requires an engine enhancement.
# / $SP* $ZW
+# LB 8a ZWJ x (ID | Extended_Pict | EmojiNRK)
+#
+($ID | $Extended_Pict | $EmojiNRK) $ZWJ $CM* $CAN_CM?;
+
+
# LB 9,10 Combining marks.
# X $CM needs to behave like X, where X is not $SP or controls.
# $CM not covered by the above needs to behave like $AL
# Stick together any combining sequences that don't match other rules.
-$CM+ $CAN_CM;
+^$CM+ $CAN_CM;
# LB 11
-$CM* $WJ $CM* $CAN_CM;
-$CM* $WJ [$LB8NonBreaks-$CM];
+#
+$WJ $CM* $CAN_CM;
+$WJ [$LB8NonBreaks-$CM];
$CANT_CM $CM* $WJ;
-$CM* $CAN_CM $CM* $WJ;
+$CAN_CM $CM* $WJ;
# LB 12a
# [^SP BA HY] x GL
#
-$CM* $GL $CM* [$LB8NonBreaks-[$CM $SP $BA $BAX $HY]];
+$GL $CM* [$LB8NonBreaks-[$CM $SP $BA $BAX $HY]];
# LB 12
# GL x
#
$CANT_CM $CM* $GL;
-$CM* $CAN_CM $CM* $GL;
+$CAN_CM $CM* $GL;
# LB 13
@@ -569,34 +453,22 @@ $EX [$LB8NonBreaks-$CM];
$IS [$LB8NonBreaks-$CM];
$SY [$LB8NonBreaks-$CM];
-# Rule 13 & 14 taken together for an edge case.
-# Match this, shown forward
-# OP SP+ ($CM+ behaving as $AL) (CL | CP | EX | IS | IY)
-# This really wants to chain at the $CM+ (which is acting as an $AL)
-# except for $CM chaining being disabled.
-[$CL $CP $EX $IS $SY] $CM+ $SP+ $CM* $OP;
# LB 14 OP SP* x
#
-$CM* $CAN_CM $SP* $CM* $OP;
- $CANT_CM $SP* $CM* $OP;
-$AL_FOLLOW? $CM+ $SP $SP* $CM* $OP; # by LB 10, behaves like $AL_FOLLOW? $AL $SP* $CM* $OP
-
- $AL_FOLLOW_NOCM $CM+ $SP+ $CM* $OP;
-$CM* $AL_FOLLOW_CM $CM+ $SP+ $CM* $OP;
-$SY $CM $SP+ $OP; # TODO: Experiment. Remove.
-
+. $SP* $CM* $OP;
+$AL_FOLLOW? $CM+ $SP+ $CM* $OP; # by LB 10, behaves like $AL_FOLLOW? $AL $SP+ $CM* $OP
# LB 15
-$CM* $OP $SP* $CM* $QU;
+$OP $SP* $CM* $QU;
# LB 16
# Don't include $NSX here
-$CM* $NS $SP* $CM* ($CL | $CP);
+$NS $SP* $CM* ($CL | $CP);
# LB 17
-$CM* $B2 $SP* $CM* $B2;
+$B2 $SP* $CM* $B2;
# LB 18 break after spaces
# Nothing explicit needed here.
@@ -605,13 +477,13 @@ $CM* $B2 $SP* $CM* $B2;
#
# LB 19
#
-$CM* $QU $CM* $CAN_CM; # . x QU
-$CM* $QU $LB18NonBreaks;
+$QU $CM* $CAN_CM; # . x QU
+$QU $LB18NonBreaks;
-$CM* $CAN_CM $CM* $QU; # QU x .
+$CAN_CM $CM* $QU; # QU x .
$CANT_CM $CM* $QU;
-
+
#
# LB 20 Break before and after CB.
# nothing needed here.
@@ -619,35 +491,38 @@ $CM* $CAN_CM $CM* $QU; # QU x .
# LB 21
# Don't include $BAX or $NSX here
-$CM* ($BA | $HY | $NS) $CM* [$LB20NonBreaks-$CM]; # . x (BA | HY | NS)
+($BA | $HY | $NS) $CM* [$LB20NonBreaks-$CM]; # . x (BA | HY | NS)
-$CM* [$LB20NonBreaks-$CM] $CM* $BB; # BB x .
-[^$CB] $CM* $BB; #
+[$LB20NonBreaks-$CM] $CM* $BB; # BB x .
+[^$CB] $CM* $BB; #
# LB21a
-[^$CB]? $CM* ($HY | $BA | $BAX) $CM* $HL;
+[^$CM $CB]? $CM* ($HY | $BA | $BAX) $CM* $HL;
# LB21b (reverse)
-$CM* $HL $CM* $SY;
+$HL $CM* $SY;
# LB 22
-$CM* $IN $CM* ($ALPlus | $HL);
-$CM* $IN $CM* $EX;
-$CM* $IN $CM* $ID;
-# $CM* $IN $CM* $IN; # delete this rule for CSS loose
-$CM* $IN $CM* $NU;
+$IN $CM* ($ALPlus | $HL);
+$IN $CM* $EX;
+$IN $CM* ($ID | $EB | $EM);
+# $IN $CM* $IN; # delete this rule for CSS loose
+$IN $CM* $NU;
# LB 23
# Do not include $POX here
-$CM* $PO $CM* $ID;
-$CM* $NU $CM* ($ALPlus | $HL);
-$CM* ($ALPlus | $HL) $CM* $NU;
+$NU $CM* ($ALPlus | $HL);
+($ALPlus | $HL) $CM* $NU;
+
+# LB23a
+# Do not include $PRX here
+($ID | $EB | $EM) $CM* $PR;
+$PO $CM* ($ID | $EB | $EM);
# LB 24
# Do not include $PRX here
-$CM* $ID $CM* $PR;
-$CM* ($ALPlus | $HL) $CM* $PR;
-$CM* ($ALPlus | $HL) $CM* ($PO | $POX);
+($ALPlus | $HL) $CM* ($PR | $PO | $POX);
+($PR | $PO | $POX) $CM* ($ALPlus | $HL);
# LB 25
@@ -655,37 +530,56 @@ $CM* ($ALPlus | $HL) $CM* ($PO | $POX);
($CM* ($PR | $PRX | $PO))? ($CM* ($CL | $CP))? ($CM* ($NU | $IS | $SY))* $CM* $NU ($CM* ($OP | $HY))? ($CM* ($PR | $PO | $POX))?;
# LB 26
-$CM* ($H3 | $H2 | $JV | $JL) $CM* $JL;
-$CM* ($JT | $JV) $CM* ($H2 | $JV);
-$CM* $JT $CM* ($H3 | $JT);
+($H3 | $H2 | $JV | $JL) $CM* $JL;
+($JT | $JV) $CM* ($H2 | $JV);
+$JT $CM* ($H3 | $JT);
# LB 27
# Do not include $POX or $PRX here
-$CM* $IN $CM* ($H3 | $H2 | $JT | $JV | $JL);
-$CM* $PO $CM* ($H3 | $H2 | $JT | $JV | $JL);
-$CM* ($H3 | $H2 | $JT | $JV | $JL) $CM* $PR;
+$IN $CM* ($H3 | $H2 | $JT | $JV | $JL);
+$PO $CM* ($H3 | $H2 | $JT | $JV | $JL);
+ ($H3 | $H2 | $JT | $JV | $JL) $CM* $PR;
# LB 28
-$CM* ($ALPlus | $HL) $CM* ($ALPlus | $HL);
+($ALPlus | $HL) $CM* ($ALPlus | $HL);
# LB 29
-$CM* ($ALPlus | $HL) $CM* $IS;
+($ALPlus | $HL) $CM* $IS;
# LB 30
-$CM* $OP $CM* ($ALPlus | $HL | $NU);
-$CM* ($ALPlus | $HL | $NU) $CM* $CP;
+$OP $CM* ($ALPlus | $HL | $NU);
+($ALPlus | $HL | $NU) $CM* $CP;
# LB 30a
-$CM* $RI $CM* $RI;
+# Pairs of Regional Indicators.
+# The following two rules are nearly identical. The first matches only sequences with an odd number of adjacent RIs,
+# the second with an even number. Stripping away the cruft they look like
+# [^RI] RI / (RI RI)+ ^RI;
+# [^RI] RI RI / (RI RI)+ ^RI;
+#
+# Line Loose tailoring: Don't include NSX here.
+[{bof} $NS $HY $BA $QU $CL $CP $EX $IS $SY $WJ $GL $ZW $SP $BK $CR $LF $NL $ZWJ] $CM* $RI / ($CM* $RI $CM* $RI)+ $CM* [{eof}[^$RI $CM]];
+[{bof} $NS $HY $BA $QU $CL $CP $EX $IS $SY $WJ $GL $ZW $SP $BK $CR $LF $NL $ZWJ] $CM* $RI $CM* $RI / ($CM* $RI $CM* $RI)+ $CM* [{eof}[^$RI $CM]];
+
+# In general, adjacent RIs stay together. The hard-break rules, above, overide this, forcing in the boundaries between pairs.
+$RI $CM* $RI;
+
+# WJ, GL, QU, etc. are classes with rules like "WJ x " which includes "WJ x RI".
+$RI $CM* ([$WJ $GL $QU $BB] | (($HY | $BA)$CM* $HL));
+
+
+# LB 30b Do not break between an Emoji Base and an Emoji Modifier
+$EM $CM* $EB;
+
## -------------------------------------------------
!!safe_reverse;
# LB 9
-$CM+ [^$CM $BK $CR $LF $NL $ZW $SP];
-$CM+ $SP / .;
+^$CM+ [^$CM $BK $CR $LF $NL $ZW $SP];
+^$CM+ $SP / .;
# LB 14
$SP+ $CM* $OP;
@@ -706,6 +600,9 @@ $CM* ($HY | $BA | $BAX) $CM* $HL;
($CM* ($IS | $SY))+ $CM* $NU;
($CL | $CP) $CM* ($NU | $IS | $SY);
+# LB 30
+($CM* $RI)+;
+
# For dictionary-based break
$dictionary $dictionary;
@@ -722,6 +619,6 @@ $dictionary $dictionary;
# turn off rule chaining. We don't want to move more
# than necessary.
#
-[$CM $OP $QU $CL $CP $B2 $PR $PRX $HY $BA $BAX $SP $dictionary]+ [^$CM $OP $QU $CL $CP $B2 $PR $PRX $HY $BA $BAX $dictionary];
+^[$CM $OP $QU $CL $CP $B2 $PR $PRX $HY $BA $BAX $SP $RI $ZWJ $dictionary]+ [^$CM $OP $QU $CL $CP $B2 $PR $PRX $HY $BA $BAX $RI $ZWJ $dictionary];
$dictionary $dictionary;
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