| # Copyright (c) 2002-2015 International Business Machines Corporation and |
| # others. All Rights Reserved. |
| # |
| # file: line_loose.txt |
| # |
| # Line Breaking Rules |
| # Implement default line breaking as defined by |
| # Unicode Standard Annex #14 Revision 34 for Unicode 8.0 |
| # http://www.unicode.org/reports/tr14/ |
| # 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, |
| # not because the older behavior is desirable. |
| # |
| # This tailors the line break behavior to correspond to CSS |
| # line-break=loose (BCP47 -u-lb-loose) as defined for languages other than |
| # Chinese & Japanese. |
| # It sets characters of class CJ to behave like ID. |
| # In addition, it allows breaks: |
| # * before iteration marks 3005, 303B, 309D, 309E, 30FD, 30FE (all NS) |
| # * between characters of LineBreak class IN |
| |
| # |
| # Character Classes defined by TR 14. |
| # |
| |
| !!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:]; |
| $BA = [:LineBreak = Break_After:]; |
| $BB = [:LineBreak = Break_Before:]; |
| $BK = [:LineBreak = Mandatory_Break:]; |
| $B2 = [:LineBreak = Break_Both:]; |
| $CB = [:LineBreak = Contingent_Break:]; |
| $CJ = [:LineBreak = Conditional_Japanese_Starter:]; |
| $CL = [:LineBreak = Close_Punctuation:]; |
| $CM = [:LineBreak = Combining_Mark:]; |
| $CP = [:LineBreak = Close_Parenthesis:]; |
| $CR = [:LineBreak = Carriage_Return:]; |
| $EX = [:LineBreak = Exclamation:]; |
| $GL = [:LineBreak = Glue:]; |
| $HL = [:LineBreak = Hebrew_Letter:]; |
| $HY = [:LineBreak = Hyphen:]; |
| $H2 = [:LineBreak = H2:]; |
| $H3 = [:LineBreak = H3:]; |
| $ID = [[:LineBreak = Ideographic:] $CJ]; |
| $IN = [:LineBreak = Inseperable:]; |
| $IS = [:LineBreak = Infix_Numeric:]; |
| $JL = [:LineBreak = JL:]; |
| $JV = [:LineBreak = JV:]; |
| $JT = [:LineBreak = JT:]; |
| $LF = [:LineBreak = Line_Feed:]; |
| $NL = [:LineBreak = Next_Line:]; |
| $NSX = [\u3005 \u303B \u309D \u309E \u30FD \u30FE]; |
| $NS = [[:LineBreak = Nonstarter:] - $NSX]; |
| $NU = [:LineBreak = Numeric:]; |
| $OP = [:LineBreak = Open_Punctuation:]; |
| $PO = [:LineBreak = Postfix_Numeric:]; |
| $PR = [:LineBreak = Prefix_Numeric:]; |
| $QU = [:LineBreak = Quotation:]; |
| $RI = [:LineBreak = Regional_Indicator:]; |
| $SA = [:LineBreak = Complex_Context:]; |
| $SG = [:LineBreak = Surrogate:]; |
| $SP = [:LineBreak = Space:]; |
| $SY = [:LineBreak = Break_Symbols:]; |
| $WJ = [:LineBreak = Word_Joiner:]; |
| $XX = [:LineBreak = Unknown:]; |
| $ZW = [:LineBreak = ZWSpace:]; |
| |
| # 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. |
| |
| $dictionary = [:LineBreak = Complex_Context:]; |
| |
| # |
| # Rule LB1. By default, treat AI (characters with ambiguous east Asian width), |
| # SA (South East Asian: Thai, Lao, Khmer) |
| # 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*; |
| $BBcm = $BB $CM*; |
| $B2cm = $B2 $CM*; |
| $CLcm = $CL $CM*; |
| $CPcm = $CP $CM*; |
| $EXcm = $EX $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*; |
| $PRcm = $PR $CM*; |
| $QUcm = $QU $CM*; |
| $RIcm = $RI $CM*; |
| $SYcm = $SY $CM*; |
| $WJcm = $WJ $CM*; |
| |
| ## ------------------------------------------------- |
| |
| !!forward; |
| |
| # |
| # Each class of character can stand by itself as an unbroken token, with trailing combining stuff |
| # |
| $ALPlus $CM+; |
| $BA $CM+; |
| $BB $CM+; |
| $B2 $CM+; |
| $CL $CM+; |
| $CP $CM+; |
| $EX $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+; |
| $PR $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. |
| # |
| # Note that $CM itself is left out of this set. If CM is needed as a base |
| # it must be listed separately in the rule. |
| # |
| $CAN_CM = [^$SP $BK $CR $LF $NL $ZW $CM]; # Bases that can take CMs |
| $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]; |
| |
| |
| # |
| # Rule LB 4, 5 Mandatory (Hard) breaks. |
| # |
| $LB4Breaks = [$BK $CR $LF $NL]; |
| $LB4NonBreaks = [^$BK $CR $LF $NL]; |
| $CR $LF {100}; |
| |
| # |
| # LB 6 Do not break before hard line breaks. |
| # |
| $LB4NonBreaks? $LB4Breaks {100}; # LB 5 do not break before hard breaks. |
| $CAN_CM $CM* $LB4Breaks {100}; |
| $CM+ $LB4Breaks {100}; |
| |
| # LB 7 x SP |
| # x ZW |
| $LB4NonBreaks [$SP $ZW]; |
| $CAN_CM $CM* [$SP $ZW]; |
| $CM+ [$SP $ZW]; |
| |
| # |
| # LB 8 Break after zero width space |
| # TODO: ZW SP* <break> |
| # An engine change is required to write the reverse rule for this. |
| # For now, leave the Unicode 5.2 rule, ZW <break> |
| # |
| $LB8Breaks = [$LB4Breaks $ZW]; |
| $LB8NonBreaks = [[$LB4NonBreaks] - [$ZW]]; |
| |
| |
| # 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+; |
| |
| # |
| # LB 11 Do not break before or after WORD JOINER & related characters. |
| # |
| $CAN_CM $CM* $WJcm; |
| $LB8NonBreaks $WJcm; |
| $CM+ $WJcm; |
| |
| $WJcm $CANT_CM; |
| $WJcm $CAN_CM $CM*; |
| |
| # |
| # LB 12 Do not break after NBSP and related characters. |
| # GL x |
| # |
| $GLcm $CAN_CM $CM*; |
| $GLcm $CANT_CM; |
| |
| # |
| # LB 12a Do not break before NBSP and related characters ... |
| # [^SP BA HY] x GL |
| # |
| [[$LB8NonBreaks] - [$SP $BA $HY]] $CM* $GLcm; |
| $CM+ GLcm; |
| |
| |
| |
| # |
| # LB 13 Don't break before ']' or '!' or ';' or '/', even after spaces. |
| # |
| $LB8NonBreaks $CL; |
| $CAN_CM $CM* $CL; |
| $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 |
| |
| $LB8NonBreaks $EX; |
| $CAN_CM $CM* $EX; |
| $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 |
| |
| $LB8NonBreaks $SY; |
| $CAN_CM $CM* $SY; |
| $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; |
| |
| $OPcm $SP+ $CM+ $AL_FOLLOW?; # by rule 10, stand-alone CM behaves as AL |
| |
| # LB 15 |
| $QUcm $SP* $OPcm; |
| |
| # 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; |
| |
| # LB 17 |
| $B2cm $SP* $B2cm; |
| |
| # |
| # LB 18 Break after spaces. |
| # |
| $LB18NonBreaks = [$LB8NonBreaks - [$SP]]; |
| $LB18Breaks = [$LB8Breaks $SP]; |
| |
| |
| # LB 19 |
| # x QU |
| $LB18NonBreaks $CM* $QUcm; |
| $CM+ $QUcm; |
| |
| # 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. |
| |
| |
| # LB 20 |
| # <break> $CB |
| # $CB <break> |
| |
| $LB20NonBreaks = [$LB18NonBreaks - $CB]; |
| |
| # LB 21 x (BA | HY | NS) |
| # BB x |
| # |
| # DO allow breaks here before NSXcm, so don't include it |
| $LB20NonBreaks $CM* ($BAcm | $HYcm | $NScm); |
| |
| $BBcm [^$CB]; # $BB x |
| $BBcm $LB20NonBreaks $CM*; |
| |
| # LB 21a Don't break after Hebrew + Hyphen |
| # HL (HY | BA) x |
| # |
| $HLcm ($HYcm | $BAcm) [^$CB]?; |
| |
| # LB 21b (forward) Don't break between SY and HL |
| # (break between HL and SY already disallowed by LB 13 above) |
| $SYcm $HLcm; |
| |
| # LB 22 |
| ($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; |
| |
| |
| # $LB 23 |
| $IDcm $POcm; |
| $ALcm $NUcm; # includes $LB19 |
| $HLcm $NUcm; |
| $CM+ $NUcm; # Rule 10, any otherwise unattached CM behaves as AL |
| $NUcm $ALcm; |
| $NUcm $HLcm; |
| |
| # |
| # LB 24 |
| # |
| $PRcm $IDcm; |
| $PRcm ($ALcm | $HLcm); |
| $POcm ($ALcm | $HLcm); |
| |
| # |
| # LB 25 Numbers. |
| # |
| ($PRcm | $POcm)? ($OPcm | $HYcm)? $NUcm ($NUcm | $SYcm | $IScm)* ($CLcm | $CPcm)? ($PRcm | $POcm)?; |
| |
| # LB 26 Do not break a Korean syllable |
| # |
| $JLcm ($JLcm | $JVcm | $H2cm | $H3cm); |
| ($JVcm | $H2cm) ($JVcm | $JTcm); |
| ($JTcm | $H3cm) $JTcm; |
| |
| # LB 27 Treat korean Syllable Block the same as ID (don't break it) |
| ($JLcm | $JVcm | $JTcm | $H2cm | $H3cm) $INcm; |
| ($JLcm | $JVcm | $JTcm | $H2cm | $H3cm) $POcm; |
| $PRcm ($JLcm | $JVcm | $JTcm | $H2cm | $H3cm); |
| |
| |
| # LB 28 Do not break between alphabetics |
| # |
| ($ALcm | $HLcm) ($ALcm | $HLcm); |
| $CM+ ($ALcm | $HLcm); # The $CM+ is from rule 10, an unattached CM is treated as AL |
| |
| # LB 29 |
| $IScm ($ALcm | $HLcm); |
| |
| # LB 30 |
| ($ALcm | $HLcm | $NUcm) $OPcm; |
| $CM+ $OPcm; # The $CM+ is from rule 10, an unattached CM is treated as AL. |
| $CPcm ($ALcm | $HLcm | $NUcm); |
| |
| # LB 30a Do not break between regional indicators. |
| $RIcm $RIcm; |
| |
| # |
| # Reverse Rules. |
| # |
| ## ------------------------------------------------- |
| |
| !!reverse; |
| |
| $CM+ $ALPlus; |
| $CM+ $BA; |
| $CM+ $BB; |
| $CM+ $B2; |
| $CM+ $CL; |
| $CM+ $CP; |
| $CM+ $EX; |
| $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+ $PR; |
| $CM+ $QU; |
| $CM+ $RI; |
| $CM+ $SY; |
| $CM+ $WJ; |
| $CM+; |
| |
| |
| # |
| # Sequences of the form (shown forwards) |
| # [CANT_CM] <break> [CM] [whatever] |
| # The CM needs to behave as an AL |
| # |
| $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 . |
| # 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 ] / $CM+ [$BK $CR $LF $NL $ZW $SP {eof}]; |
| |
| |
| |
| # LB 4, 5, 5 |
| |
| $LB4Breaks [$LB4NonBreaks-$CM]; |
| $LB4Breaks $CM+ $CAN_CM; |
| $LF $CR; |
| |
| |
| # LB 7 x SP |
| # x ZW |
| [$SP $ZW] [$LB4NonBreaks-$CM]; |
| [$SP $ZW] $CM+ $CAN_CM; |
| |
| # LB 8 ZW SP* <break> |
| # TODO: to implement this, we need more than one look-ahead hard break in play at a time. |
| # Requires an engine enhancement. |
| # / $SP* $ZW |
| |
| # 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; |
| |
| |
| # LB 11 |
| $CM* $WJ $CM* $CAN_CM; |
| $CM* $WJ [$LB8NonBreaks-$CM]; |
| |
| $CANT_CM $CM* $WJ; |
| $CM* $CAN_CM $CM* $WJ; |
| |
| # LB 12a |
| # [^SP BA HY] x GL |
| # |
| $CM* $GL $CM* [$LB8NonBreaks-[$CM $SP $BA $HY]]; |
| |
| # LB 12 |
| # GL x |
| # |
| $CANT_CM $CM* $GL; |
| $CM* $CAN_CM $CM* $GL; |
| |
| |
| # LB 13 |
| $CL $CM+ $CAN_CM; |
| $CP $CM+ $CAN_CM; |
| $EX $CM+ $CAN_CM; |
| $IS $CM+ $CAN_CM; |
| $SY $CM+ $CAN_CM; |
| |
| $CL [$LB8NonBreaks-$CM]; |
| $CP [$LB8NonBreaks-$CM]; |
| $EX [$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. |
| |
| |
| |
| # LB 15 |
| $CM* $OP $SP* $CM* $QU; |
| |
| # LB 16 |
| # Don't include $NSX here |
| $CM* $NS $SP* $CM* ($CL | $CP); |
| |
| # LB 17 |
| $CM* $B2 $SP* $CM* $B2; |
| |
| # LB 18 break after spaces |
| # Nothing explicit needed here. |
| |
| |
| # |
| # LB 19 |
| # |
| $CM* $QU $CM* $CAN_CM; # . x QU |
| $CM* $QU $LB18NonBreaks; |
| |
| |
| $CM* $CAN_CM $CM* $QU; # QU x . |
| $CANT_CM $CM* $QU; |
| |
| # |
| # LB 20 Break before and after CB. |
| # nothing needed here. |
| # |
| |
| # LB 21 |
| # Don't include $NSX here |
| $CM* ($BA | $HY | $NS) $CM* [$LB20NonBreaks-$CM]; # . x (BA | HY | NS) |
| |
| $CM* [$LB20NonBreaks-$CM] $CM* $BB; # BB x . |
| [^$CB] $CM* $BB; # |
| |
| # LB21a |
| [^$CB] $CM* ($HY | $BA) $CM* $HL; |
| |
| # LB21b (reverse) |
| $CM* $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; |
| |
| # LB 23 |
| $CM* $PO $CM* $ID; |
| $CM* $NU $CM* ($ALPlus | $HL); |
| $CM* ($ALPlus | $HL) $CM* $NU; |
| |
| # LB 24 |
| $CM* $ID $CM* $PR; |
| $CM* ($ALPlus | $HL) $CM* $PR; |
| $CM* ($ALPlus | $HL) $CM* $PO; |
| |
| |
| # LB 25 |
| ($CM* ($PR | $PO))? ($CM* ($CL | $CP))? ($CM* ($NU | $IS | $SY))* $CM* $NU ($CM* ($OP | $HY))? ($CM* ($PR | $PO))?; |
| |
| # LB 26 |
| $CM* ($H3 | $H2 | $JV | $JL) $CM* $JL; |
| $CM* ($JT | $JV) $CM* ($H2 | $JV); |
| $CM* $JT $CM* ($H3 | $JT); |
| |
| # LB 27 |
| $CM* $IN $CM* ($H3 | $H2 | $JT | $JV | $JL); |
| $CM* $PO $CM* ($H3 | $H2 | $JT | $JV | $JL); |
| $CM* ($H3 | $H2 | $JT | $JV | $JL) $CM* $PR; |
| |
| # LB 28 |
| $CM* ($ALPlus | $HL) $CM* ($ALPlus | $HL); |
| |
| |
| # LB 29 |
| $CM* ($ALPlus | $HL) $CM* $IS; |
| |
| # LB 30 |
| $CM* $OP $CM* ($ALPlus | $HL | $NU); |
| $CM* ($ALPlus | $HL | $NU) $CM* $CP; |
| |
| # LB 30a |
| $CM* $RI $CM* $RI; |
| |
| ## ------------------------------------------------- |
| |
| !!safe_reverse; |
| |
| # LB 9 |
| $CM+ [^$CM $BK $CR $LF $NL $ZW $SP]; |
| $CM+ $SP / .; |
| |
| # LB 14 |
| $SP+ $CM* $OP; |
| |
| # LB 15 |
| $SP+ $CM* $QU; |
| |
| # LB 16 |
| $SP+ $CM* ($CL | $CP); |
| |
| # LB 17 |
| $SP+ $CM* $B2; |
| |
| # LB 21 |
| $CM* ($HY | $BA) $CM* $HL; |
| |
| # LB 25 |
| ($CM* ($IS | $SY))+ $CM* $NU; |
| ($CL | $CP) $CM* ($NU | $IS | $SY); |
| |
| # For dictionary-based break |
| $dictionary $dictionary; |
| |
| ## ------------------------------------------------- |
| |
| !!safe_forward; |
| |
| # Skip forward over all character classes that are involved in |
| # rules containing patterns with possibly more than one char |
| # of context. |
| # |
| # It might be slightly more efficient to have specific rules |
| # instead of one generic one, but only if we could |
| # turn off rule chaining. We don't want to move more |
| # than necessary. |
| # |
| [$CM $OP $QU $CL $CP $B2 $PR $HY $BA $SP $dictionary]+ [^$CM $OP $QU $CL $CP $B2 $PR $HY $BA $dictionary]; |
| $dictionary $dictionary; |
| |