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1# Copyright (c) 2002-2015  International Business Machines Corporation and
2# others. All Rights Reserved.
3#
4#  file:  line_loose_fi.txt
5#
6#         Line Breaking Rules
7#         Implement default line breaking as defined by
8#         Unicode Standard Annex #14 Revision 34 for Unicode 8.0
9#         http://www.unicode.org/reports/tr14/
10#         tailored as noted in 2nd paragraph below..
11#
12#         TODO:  Rule LB 8 remains as it was in Unicode 5.2
13#         This is only because of a limitation of ICU break engine implementation,
14#         not because the older behavior is desirable.
15#
16#         This tailors the line break behavior both for Finnish and to correpond to CSS
17#         line-break=loose (BCP47 -u-lb-loose) as defined for languages other than
18#         Chinese & Japanese.
19#         It sets characters of class CJ to behave like ID.
20#         In addition, it allows breaks before 3005, 303B, 309D, 309E, 30FD, 30FE (all NS).
21
22#
23#  Character Classes defined by TR 14.
24#
25
26!!chain;
27!!LBCMNoChain;
28
29
30!!lookAheadHardBreak;
31#
32#  !!lookAheadHardBreak    Described here because it is (as yet) undocumented elsewhere
33#                          and only used for the line break rules.
34#
35#           It is used in the implementation of rule LB 10
36#           which says to treat any combining mark that is not attached to a base
37#           character as if it were of class AL  (alphabetic).
38#
39#           The problem occurs in the reverse rules.
40#
41#           Consider a sequence like, with correct breaks as shown
42#               LF  ID  CM  AL  AL
43#                  ^       ^       ^
44#           Then consider the sequence without the initial ID (ideographic)
45#                 LF  CM  AL  AL
46#                    ^           ^
47#           Our CM, which in the first example was attached to the ideograph,
48#           is now unattached, becomes an alpha, and joins in with the other
49#           alphas.
50#
51#           When iterating forwards, these sequences do not present any problems
52#           When iterating backwards, we need to look ahead when encountering
53#           a CM to see whether it attaches to something further on or not.
54#           (Look-ahead in a reverse rule is looking towards the start)
55#
56#           If the CM is unattached, we need to force a break.
57#
58#           !!lookAheadHardBreak forces the run time state machine to
59#           stop immediately when a look ahead rule ( '/' operator) matches,
60#           and set the match position to that of the look-ahead operator,
61#           no matter what other rules may be in play at the time.
62#
63#           See rule LB 19 for an example.
64#
65
66$AI = [:LineBreak =  Ambiguous:];
67$AL = [:LineBreak =  Alphabetic:];
68$BA = [[:LineBreak =  Break_After:] - [\u2010]];
69$HH = [\u2010];
70$BB = [:LineBreak =  Break_Before:];
71$BK = [:LineBreak =  Mandatory_Break:];
72$B2 = [:LineBreak =  Break_Both:];
73$CB = [:LineBreak =  Contingent_Break:];
74$CJ = [:LineBreak =  Conditional_Japanese_Starter:];
75$CL = [:LineBreak =  Close_Punctuation:];
76$CM = [:LineBreak =  Combining_Mark:];
77$CP = [:LineBreak =  Close_Parenthesis:];
78$CR = [:LineBreak =  Carriage_Return:];
79$EX = [:LineBreak =  Exclamation:];
80$GL = [:LineBreak =  Glue:];
81$HL = [:LineBreak =  Hebrew_Letter:];
82$HY = [:LineBreak =  Hyphen:];
83$H2 = [:LineBreak =  H2:];
84$H3 = [:LineBreak =  H3:];
85$ID = [[:LineBreak =  Ideographic:] $CJ];
86$IN = [:LineBreak =  Inseperable:];
87$IS = [:LineBreak =  Infix_Numeric:];
88$JL = [:LineBreak =  JL:];
89$JV = [:LineBreak =  JV:];
90$JT = [:LineBreak =  JT:];
91$LF = [:LineBreak =  Line_Feed:];
92$NL = [:LineBreak =  Next_Line:];
93$NSX = [\u3005 \u303B \u309D \u309E \u30FD \u30FE];
94$NS = [[:LineBreak =  Nonstarter:] - $NSX];
95$NU = [:LineBreak =  Numeric:];
96$OP = [:LineBreak =  Open_Punctuation:];
97$PO = [:LineBreak =  Postfix_Numeric:];
98$PR = [:LineBreak =  Prefix_Numeric:];
99$QU = [:LineBreak =  Quotation:];
100$RI = [:LineBreak =  Regional_Indicator:];
101$SA = [:LineBreak =  Complex_Context:];
102$SG = [:LineBreak =  Surrogate:];
103$SP = [:LineBreak =  Space:];
104$SY = [:LineBreak =  Break_Symbols:];
105$WJ = [:LineBreak =  Word_Joiner:];
106$XX = [:LineBreak =  Unknown:];
107$ZW = [:LineBreak =  ZWSpace:];
108
109#   Dictionary character set, for triggering language-based break engines. Currently
110#   limited to LineBreak=Complex_Context. Note that this set only works in Unicode
111#   5.0 or later as the definition of Complex_Context was corrected to include all
112#   characters requiring dictionary break.
113
114$dictionary = [:LineBreak = Complex_Context:];
115
116#
117#  Rule LB1.  By default, treat AI  (characters with ambiguous east Asian width),
118#                               SA  (South East Asian: Thai, Lao, Khmer)
119#                               SG  (Unpaired Surrogates)
120#                               XX  (Unknown, unassigned)
121#                         as $AL  (Alphabetic)
122#
123$ALPlus = [$AL $AI $SA $SG $XX];
124
125#
126#  Combining Marks.   X $CM*  behaves as if it were X.  Rule LB6.
127#
128$ALcm = $ALPlus $CM*;
129$BAcm = $BA $CM*;
130$HHcm = $HH $CM*;
131$BBcm = $BB $CM*;
132$B2cm = $B2 $CM*;
133$CLcm = $CL $CM*;
134$CPcm = $CP $CM*;
135$EXcm = $EX $CM*;
136$GLcm = $GL $CM*;
137$HLcm = $HL $CM*;
138$HYcm = $HY $CM*;
139$H2cm = $H2 $CM*;
140$H3cm = $H3 $CM*;
141$IDcm = $ID $CM*;
142$INcm = $IN $CM*;
143$IScm = $IS $CM*;
144$JLcm = $JL $CM*;
145$JVcm = $JV $CM*;
146$JTcm = $JT $CM*;
147$NScm = $NS $CM*;
148$NSXcm = $NSX $CM*;
149$NUcm = $NU $CM*;
150$OPcm = $OP $CM*;
151$POcm = $PO $CM*;
152$PRcm = $PR $CM*;
153$QUcm = $QU $CM*;
154$RIcm = $RI $CM*;
155$SYcm = $SY $CM*;
156$WJcm = $WJ $CM*;
157
158## -------------------------------------------------
159
160!!forward;
161
162#
163#  Each class of character can stand by itself as an unbroken token, with trailing combining stuff
164#
165$ALPlus $CM+;
166$BA $CM+;
167$HH $CM+;
168$BB $CM+;
169$B2 $CM+;
170$CL $CM+;
171$CP $CM+;
172$EX $CM+;
173$GL $CM+;
174$HL $CM+;
175$HY $CM+;
176$H2 $CM+;
177$H3 $CM+;
178$ID $CM+;
179$IN $CM+;
180$IS $CM+;
181$JL $CM+;
182$JV $CM+;
183$JT $CM+;
184$NS $CM+;
185$NSX $CM+;
186$NU $CM+;
187$OP $CM+;
188$PO $CM+;
189$PR $CM+;
190$QU $CM+;
191$RI $CM+;
192$SY $CM+;
193$WJ $CM+;
194
195#
196# CAN_CM  is the set of characters that may combine with CM combining chars.
197#         Note that Linebreak UAX 14's concept of a combining char and the rules
198#         for what they can combine with are _very_ different from the rest of Unicode.
199#
200#         Note that $CM itself is left out of this set.  If CM is needed as a base
201#         it must be listed separately in the rule.
202#
203$CAN_CM  = [^$SP $BK $CR $LF $NL $ZW $CM];       # Bases that can   take CMs
204$CANT_CM = [ $SP $BK $CR $LF $NL $ZW $CM];       # Bases that can't take CMs
205
206#
207# AL_FOLLOW  set of chars that can unconditionally follow an AL
208#            Needed in rules where stand-alone $CM s are treated as AL.
209#            Chaining is disabled with CM because it causes other failures,
210#            so for this one case we need to manually list out longer sequences.
211#
212$AL_FOLLOW_NOCM = [$BK $CR $LF $NL $ZW $SP];
213$AL_FOLLOW_CM   = [$CL $CP $EX $HL $IS $SY $WJ $GL $OP $QU $BA $HH $HY $NS $NSX $IN $NU $ALPlus];
214$AL_FOLLOW      = [$AL_FOLLOW_NOCM $AL_FOLLOW_CM];
215
216
217#
218#  Rule LB 4, 5    Mandatory (Hard) breaks.
219#
220$LB4Breaks    = [$BK $CR $LF $NL];
221$LB4NonBreaks = [^$BK $CR $LF $NL];
222$CR $LF {100};
223
224#
225#  LB 6    Do not break before hard line breaks.
226#
227$LB4NonBreaks?  $LB4Breaks {100};    # LB 5  do not break before hard breaks.
228$CAN_CM $CM*    $LB4Breaks {100};
229$CM+            $LB4Breaks {100};
230
231# LB 7         x SP
232#              x ZW
233$LB4NonBreaks [$SP $ZW];
234$CAN_CM $CM*  [$SP $ZW];
235$CM+          [$SP $ZW];
236
237#
238# LB 8         Break after zero width space
239#              TODO:  ZW SP* <break>
240#              An engine change is required to write the reverse rule for this.
241#              For now, leave the Unicode 5.2 rule, ZW <break>
242#
243$LB8Breaks    = [$LB4Breaks $ZW];
244$LB8NonBreaks = [[$LB4NonBreaks] - [$ZW]];
245
246
247# LB 9     Combining marks.      X   $CM needs to behave like X, where X is not $SP, $BK $CR $LF $NL
248#                                $CM not covered by the above needs to behave like $AL
249#                                See definition of $CAN_CM.
250
251$CAN_CM $CM+;                   #  Stick together any combining sequences that don't match other rules.
252$CM+;
253
254#
255# LB 11  Do not break before or after WORD JOINER & related characters.
256#
257$CAN_CM $CM*  $WJcm;
258$LB8NonBreaks $WJcm;
259$CM+          $WJcm;
260
261$WJcm $CANT_CM;
262$WJcm $CAN_CM $CM*;
263
264#
265# LB 12  Do not break after NBSP and related characters.
266#         GL  x
267#
268$GLcm $CAN_CM $CM*;
269$GLcm $CANT_CM;
270
271#
272# LB 12a  Do not break before NBSP and related characters ...
273#            [^SP BA HY] x GL
274#
275[[$LB8NonBreaks] - [$SP $BA $HH $HY]] $CM* $GLcm;
276$CM+ GLcm;
277
278
279
280#
281# LB 13   Don't break before ']' or '!' or ';' or '/', even after spaces.
282#
283$LB8NonBreaks $CL;
284$CAN_CM $CM*  $CL;
285$CM+          $CL;              # by rule 10, stand-alone CM behaves as AL
286
287$LB8NonBreaks $CP;
288$CAN_CM $CM*  $CP;
289$CM+          $CP;              # by rule 10, stand-alone CM behaves as AL
290
291$LB8NonBreaks $EX;
292$CAN_CM $CM*  $EX;
293$CM+          $EX;              # by rule 10, stand-alone CM behaves as AL
294
295$LB8NonBreaks $IS;
296$CAN_CM $CM*  $IS;
297$CM+          $IS;              # by rule 10, stand-alone CM behaves as AL
298
299$LB8NonBreaks $SY;
300$CAN_CM $CM*  $SY;
301$CM+          $SY;              # by rule 10, stand-alone CM behaves as AL
302
303
304#
305# LB 14  Do not break after OP, even after spaces
306#
307$OPcm $SP* $CAN_CM $CM*;
308$OPcm $SP* $CANT_CM;
309
310$OPcm $SP+ $CM+ $AL_FOLLOW?;    # by rule 10, stand-alone CM behaves as AL
311
312# LB 15
313$QUcm $SP* $OPcm;
314
315# LB 16
316# Do not break between closing punctuation and $NS, even with intervening spaces
317# But DO allow a break between closing punctuation and $NSX, don't include it here
318($CLcm | $CPcm) $SP* $NScm;
319
320# LB 17
321$B2cm $SP* $B2cm;
322
323#
324# LB 18  Break after spaces.
325#
326$LB18NonBreaks = [$LB8NonBreaks - [$SP]];
327$LB18Breaks    = [$LB8Breaks $SP];
328
329
330# LB 19
331#         x QU
332$LB18NonBreaks $CM* $QUcm;
333$CM+                $QUcm;
334
335#         QU  x
336$QUcm .?;
337$QUcm $LB18NonBreaks $CM*;    # Don't let a combining mark go onto $CR, $BK, etc.
338                              #  TODO:  I don't think this rule is needed.
339
340
341# LB 20
342#        <break>  $CB
343#        $CB   <break>
344
345$LB20NonBreaks = [$LB18NonBreaks - $CB];
346
347# LB 20.09 added rule for Finnish tailoring
348# LB 21        x   (BA | HY | NS)
349#           BB x
350#
351# DO allow breaks here before NSXcm, so don't include it
352$LB20NonBreaks $CM* ($BAcm | $HHcm | $HYcm | $NScm) / $AL;
353$LB20NonBreaks $CM* ($BAcm | $HHcm | $HYcm | $NScm);
354($HY | $HH) $AL;
355
356$BBcm [^$CB];                                  #  $BB  x
357$BBcm $LB20NonBreaks $CM*;
358
359# LB 21a Don't break after Hebrew + Hyphen
360#   HL (HY | BA) x
361#
362$HLcm ($HYcm | $BAcm | $HHcm) [^$CB]?;
363
364# LB 21b (forward) Don't break between SY and HL
365# (break between HL and SY already disallowed by LB 13 above)
366$SYcm $HLcm;
367
368# LB 22
369($ALcm | $HLcm) $INcm;
370$CM+     $INcm;     #  by rule 10, any otherwise unattached CM behaves as AL
371$EXcm    $INcm;
372$IDcm    $INcm;
373$INcm    $INcm;
374$NUcm    $INcm;
375
376
377# $LB 23
378$IDcm  $POcm;
379$ALcm  $NUcm;       # includes $LB19
380$HLcm  $NUcm;
381$CM+   $NUcm;       # Rule 10, any otherwise unattached CM behaves as AL
382$NUcm  $ALcm;
383$NUcm  $HLcm;
384
385#
386# LB 24
387#
388$PRcm $IDcm;
389$PRcm ($ALcm | $HLcm);
390$POcm ($ALcm | $HLcm);
391
392#
393# LB 25   Numbers.
394#
395($PRcm | $POcm)? ($OPcm | $HYcm)? $NUcm ($NUcm | $SYcm | $IScm)* ($CLcm | $CPcm)? ($PRcm | $POcm)?;
396
397# LB 26  Do not break a Korean syllable
398#
399$JLcm ($JLcm | $JVcm | $H2cm | $H3cm);
400($JVcm | $H2cm) ($JVcm | $JTcm);
401($JTcm | $H3cm) $JTcm;
402
403# LB 27  Treat korean Syllable Block the same as ID  (don't break it)
404($JLcm | $JVcm | $JTcm | $H2cm | $H3cm) $INcm;
405($JLcm | $JVcm | $JTcm | $H2cm | $H3cm) $POcm;
406$PRcm ($JLcm | $JVcm | $JTcm | $H2cm | $H3cm);
407
408
409# LB 28   Do not break between alphabetics
410#
411($ALcm | $HLcm) ($ALcm | $HLcm);
412$CM+ ($ALcm | $HLcm);      # The $CM+ is from rule 10, an unattached CM is treated as AL
413
414# LB 29
415$IScm ($ALcm | $HLcm);
416
417# LB 30
418($ALcm | $HLcm | $NUcm) $OPcm;
419$CM+ $OPcm;         # The $CM+ is from rule 10, an unattached CM is treated as AL.
420$CPcm ($ALcm | $HLcm | $NUcm);
421
422# LB 30a  Do not break between regional indicators.
423$RIcm $RIcm;
424
425#
426#  Reverse Rules.
427#
428## -------------------------------------------------
429
430!!reverse;
431
432$CM+ $ALPlus;
433$CM+ $BA;
434$CM+ $HH;
435$CM+ $BB;
436$CM+ $B2;
437$CM+ $CL;
438$CM+ $CP;
439$CM+ $EX;
440$CM+ $GL;
441$CM+ $HL;
442$CM+ $HY;
443$CM+ $H2;
444$CM+ $H3;
445$CM+ $ID;
446$CM+ $IN;
447$CM+ $IS;
448$CM+ $JL;
449$CM+ $JV;
450$CM+ $JT;
451$CM+ $NS;
452$CM+ $NSX;
453$CM+ $NU;
454$CM+ $OP;
455$CM+ $PO;
456$CM+ $PR;
457$CM+ $QU;
458$CM+ $RI;
459$CM+ $SY;
460$CM+ $WJ;
461$CM+;
462
463
464#
465#  Sequences of the form  (shown forwards)
466#      [CANT_CM]  <break>  [CM]  [whatever]
467#  The CM needs to behave as an AL
468#
469$AL_FOLLOW $CM+ / (
470          [$BK $CR $LF $NL $ZW {eof}] |
471          $SP+ $CM+ $SP |
472          $SP+ $CM* ([^$OP $CM $SP] | [$AL {eof}]));   # if LB 14 will match, need to surpress this break.
473                                               #  LB14 says    OP SP* x .
474                                               #    becomes    OP SP* x AL
475                                               #    becomes    OP SP* x CM+ AL_FOLLOW
476                                               #
477                                               # Further note:  the $AL in [$AL {eof}] is only to work around
478                                               #                a rule compiler bug which complains about
479                                               #                empty sets otherwise.
480
481#
482#  Sequences of the form  (shown forwards)
483#      [CANT_CM]  <break> [CM]  <break>  [PR]
484#  The CM needs to behave as an AL
485#  This rule is concerned about getting the second of the two <breaks> in place.
486#
487
488[$PR   ] / $CM+ [$BK $CR $LF $NL $ZW $SP {eof}];
489
490
491
492# LB 4, 5, 5
493
494$LB4Breaks [$LB4NonBreaks-$CM];
495$LB4Breaks $CM+ $CAN_CM;
496$LF $CR;
497
498
499# LB 7         x SP
500#              x ZW
501[$SP $ZW] [$LB4NonBreaks-$CM];
502[$SP $ZW] $CM+ $CAN_CM;
503
504# LB 8 ZW SP* <break>
505#     TODO: to implement this, we need more than one look-ahead hard break in play at a time.
506#           Requires an engine enhancement.
507#   / $SP* $ZW
508
509# LB 9,10  Combining marks.
510#    X   $CM needs to behave like X, where X is not $SP or controls.
511#    $CM not covered by the above needs to behave like $AL
512# Stick together any combining sequences that don't match other rules.
513$CM+ $CAN_CM;
514
515
516# LB 11
517$CM* $WJ $CM* $CAN_CM;
518$CM* $WJ      [$LB8NonBreaks-$CM];
519
520     $CANT_CM $CM* $WJ;
521$CM* $CAN_CM  $CM* $WJ;
522
523# LB 12a
524#      [^SP BA HY] x GL
525#
526$CM* $GL $CM* [$LB8NonBreaks-[$CM $SP $BA $HH $HY]];
527
528# LB 12
529#     GL  x
530#
531$CANT_CM $CM* $GL;
532$CM* $CAN_CM $CM* $GL;
533
534
535# LB 13
536$CL $CM+ $CAN_CM;
537$CP $CM+ $CAN_CM;
538$EX $CM+ $CAN_CM;
539$IS $CM+ $CAN_CM;
540$SY $CM+ $CAN_CM;
541
542$CL [$LB8NonBreaks-$CM];
543$CP [$LB8NonBreaks-$CM];
544$EX [$LB8NonBreaks-$CM];
545$IS [$LB8NonBreaks-$CM];
546$SY [$LB8NonBreaks-$CM];
547
548# Rule 13 & 14 taken together for an edge case.
549#   Match this, shown forward
550#     OP SP+  ($CM+ behaving as $AL) (CL | CP | EX | IS | IY)
551#   This really wants to chain at the $CM+ (which is acting as an $AL)
552#   except for $CM chaining being disabled.
553[$CL $CP $EX $IS $SY] $CM+ $SP+ $CM* $OP;
554
555# LB 14    OP SP* x
556#
557$CM* $CAN_CM    $SP* $CM* $OP;
558     $CANT_CM   $SP* $CM* $OP;
559$AL_FOLLOW? $CM+  $SP $SP* $CM* $OP;     #  by LB 10, behaves like $AL_FOLLOW? $AL $SP* $CM* $OP
560
561     $AL_FOLLOW_NOCM $CM+ $SP+ $CM* $OP;
562$CM* $AL_FOLLOW_CM   $CM+ $SP+ $CM* $OP;
563$SY $CM $SP+ $OP;   # TODO:  Experiment.  Remove.
564
565
566
567# LB 15
568$CM* $OP $SP* $CM* $QU;
569
570# LB 16
571# Don't include $NSX here
572$CM* $NS $SP* $CM* ($CL | $CP);
573
574# LB 17
575$CM* $B2 $SP* $CM* $B2;
576
577# LB 18  break after spaces
578#        Nothing explicit needed here.
579
580
581#
582# LB 19
583#
584$CM* $QU $CM* $CAN_CM;                                #   . x QU
585$CM* $QU      $LB18NonBreaks;
586
587
588$CM* $CAN_CM  $CM* $QU;                               #   QU x .
589     $CANT_CM $CM* $QU;
590
591#
592#  LB 20  Break before and after CB.
593#         nothing needed here.
594#
595
596# LB 20.09 added rule for Finnish tailoring
597$AL ($HY | $HH) / $SP;
598
599# LB 21
600# Don't include $NSX here
601$CM* ($BA | $HH | $HY | $NS) $CM* [$LB20NonBreaks-$CM];     #  . x (BA | HY | NS)
602
603$CM* [$LB20NonBreaks-$CM] $CM* $BB;                   #  BB x .
604[^$CB] $CM* $BB;                                      #
605
606# LB21a
607[^$CB] $CM* ($HY | $BA | $HH) $CM* $HL;
608
609# LB21b (reverse)
610$CM* $HL $CM* $SY;
611
612# LB 22
613$CM* $IN $CM* ($ALPlus | $HL);
614$CM* $IN $CM* $EX;
615$CM* $IN $CM* $ID;
616$CM* $IN $CM* $IN;
617$CM* $IN $CM* $NU;
618
619# LB 23
620$CM* $PO $CM* $ID;
621$CM* $NU $CM* ($ALPlus | $HL);
622$CM* ($ALPlus | $HL) $CM* $NU;
623
624# LB 24
625$CM* $ID $CM* $PR;
626$CM* ($ALPlus | $HL) $CM* $PR;
627$CM* ($ALPlus | $HL) $CM* $PO;
628
629
630# LB 25
631($CM* ($PR | $PO))? ($CM* ($CL | $CP))? ($CM* ($NU | $IS | $SY))* $CM* $NU ($CM* ($OP | $HY))? ($CM* ($PR | $PO))?;
632
633# LB 26
634$CM* ($H3 | $H2 | $JV | $JL) $CM* $JL;
635$CM* ($JT | $JV) $CM* ($H2 | $JV);
636$CM* $JT $CM* ($H3 | $JT);
637
638# LB 27
639$CM* $IN $CM* ($H3 | $H2 | $JT | $JV | $JL);
640$CM* $PO $CM* ($H3 | $H2 | $JT | $JV | $JL);
641$CM* ($H3 | $H2 | $JT | $JV | $JL) $CM* $PR;
642
643# LB 28
644$CM* ($ALPlus | $HL) $CM* ($ALPlus | $HL);
645
646
647# LB 29
648$CM* ($ALPlus | $HL) $CM* $IS;
649
650# LB 30
651$CM* $OP $CM* ($ALPlus | $HL | $NU);
652$CM* ($ALPlus | $HL | $NU) $CM* $CP;
653
654# LB 30a
655$CM* $RI $CM* $RI;
656
657## -------------------------------------------------
658
659!!safe_reverse;
660
661# LB 9
662$CM+ [^$CM $BK $CR $LF $NL $ZW $SP];
663$CM+ $SP / .;
664
665# LB 14
666$SP+ $CM* $OP;
667
668# LB 15
669$SP+ $CM* $QU;
670
671# LB 16
672$SP+ $CM* ($CL | $CP);
673
674# LB 17
675$SP+ $CM* $B2;
676
677# LB 21
678$CM* ($HY | $BA | $HH) $CM* $HL;
679
680# LB 25
681($CM* ($IS | $SY))+ $CM* $NU;
682($CL | $CP) $CM* ($NU | $IS | $SY);
683
684# For dictionary-based break
685$dictionary $dictionary;
686
687## -------------------------------------------------
688
689!!safe_forward;
690
691# Skip forward over all character classes that are involved in
692#   rules containing patterns with possibly more than one char
693#   of context.
694#
695#  It might be slightly more efficient to have specific rules
696#  instead of one generic one, but only if we could
697#  turn off rule chaining.  We don't want to move more
698#  than necessary.
699#
700[$CM $OP $QU $CL $CP $B2 $PR $HY $BA $SP $dictionary]+ [^$CM $OP $QU $CL $CP $B2 $PR $HY $BA $dictionary];
701$dictionary $dictionary;
702
703