#
# Copyright (C) 2002-2013, International Business Machines Corporation
# and others. All Rights Reserved.
#
# file: word.txt
#
# ICU Word Break Rules
# See Unicode Standard Annex #29.
# These rules are based on UAX #29 Revision 20 for Unicode Version 6.2
#
# Note: Updates to word.txt will usually need to be merged into
# word_POSIX.txt also.
##############################################################################
#
# Character class definitions from TR 29
#
##############################################################################
!!chain;
#
# Character Class Definitions.
#
$CR = [\p{Word_Break = CR}];
$LF = [\p{Word_Break = LF}];
$Newline = [\p{Word_Break = Newline}];
$Extend = [\p{Word_Break = Extend}];
$Format = [\p{Word_Break = Format}];
$Hiragana = [:Hiragana:];
$Katakana = [\p{Word_Break = Katakana}];
$Han = [:Han:];
$ALetter = [\p{Word_Break = ALetter}];
$MidNumLet = [\p{Word_Break = MidNumLet}];
$MidLetter = [\p{Word_Break = MidLetter}];
$MidNum = [\p{Word_Break = MidNum}];
$Numeric = [\p{Word_Break = Numeric}];
$ExtendNumLet = [\p{Word_Break = ExtendNumLet}];
$RI_A = \U0001F1E6; # Trail ERTU
$RI_B = \U0001F1E7; # Trail EGR
$RI_C = \U0001F1E8; # Trail AHLNZ
$RI_D = \U0001F1E9; # Trail EK
$RI_E = \U0001F1EA; # Trail GS
$RI_F = \U0001F1EB; # Trail IR
$RI_G = \U0001F1EC; # Trail BR
$RI_H = \U0001F1ED; # Trail KU
$RI_I = \U0001F1EE; # Trail DLNT
$RI_J = \U0001F1EF; # Trail OP
$RI_K = \U0001F1F0; # Trail R
$RI_L = \U0001F1F1; # Trail B
$RI_M = \U0001F1F2; # Trail OXY
$RI_N = \U0001F1F3; # Trail LO
$RI_P = \U0001F1F5; # Trail LT
$RI_R = \U0001F1F7; # Trail OU
$RI_S = \U0001F1F8; # Trail AEGK
$RI_T = \U0001F1F9; # Trail HRW
$RI_U = \U0001F1FA; # Trail AS
$RI_V = \U0001F1FB; # Trail N
$RI_A_End = [\U0001F1EA \U0001F1F7 \U0001F1F9 \U0001F1FA]; # ERTU
$RI_B_End = [\U0001F1EA \U0001F1EC \U0001F1F7]; # EGR
$RI_C_End = [\U0001F1E6 \U0001F1ED \U0001F1F1 \U0001F1F3 \U0001F1FF]; # AHLNZ
$RI_D_End = [\U0001F1EA \U0001F1F0]; # EK
$RI_E_End = [\U0001F1EC \U0001F1F8]; # GS
$RI_F_End = [\U0001F1EE \U0001F1F7]; # IR
$RI_G_End = [\U0001F1E7 \U0001F1F7]; # BR
$RI_H_End = [\U0001F1F0 \U0001F1FA]; # KU
$RI_I_End = [\U0001F1E9 \U0001F1F1 \U0001F1F3 \U0001F1F9]; # DLNT
$RI_J_End = [\U0001F1F4 \U0001F1F5]; # OP
$RI_K_End = \U0001F1F7; # R
$RI_L_End = \U0001F1E7; # B
$RI_M_End = [\U0001F1F4 \U0001F1FD \U0001F1FE]; # OXY
$RI_N_End = [\U0001F1F1 \U0001F1F4]; # LO
$RI_P_End = [\U0001F1F1 \U0001F1F9]; # LT
$RI_R_End = [\U0001F1F4 \U0001F1FA]; # OU
$RI_S_End = [\U0001F1E6 \U0001F1EA \U0001F1EC \U0001F1F0]; # AEGK
$RI_T_End = [\U0001F1ED \U0001F1F7 \U0001F1FC]; # HRW
$RI_U_End = [\U0001F1E6 \U0001F1F8]; # AS
$RI_V_End = \U0001F1F3; # N
# 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.
$Control = [\p{Grapheme_Cluster_Break = Control}];
$HangulSyllable = [\uac00-\ud7a3];
$ComplexContext = [:LineBreak = Complex_Context:];
$KanaKanji = [$Han $Hiragana $Katakana];
$dictionaryCJK = [$KanaKanji $HangulSyllable];
$dictionary = [$ComplexContext $dictionaryCJK];
# leave CJK scripts out of ALetterPlus
$ALetterPlus = [$ALetter-$dictionaryCJK [$ComplexContext-$Extend-$Control]];
#
# Rules 4 Ignore Format and Extend characters,
# except when they appear at the beginning of a region of text.
#
# TODO: check if handling of katakana in dictionary makes rules incorrect/void
$KatakanaEx = $Katakana ($Extend | $Format)*;
$ALetterEx = $ALetterPlus ($Extend | $Format)*;
$MidNumLetEx = $MidNumLet ($Extend | $Format)*;
$MidLetterEx = $MidLetter ($Extend | $Format)*;
$MidNumEx = $MidNum ($Extend | $Format)*;
$NumericEx = $Numeric ($Extend | $Format)*;
$ExtendNumLetEx = $ExtendNumLet ($Extend | $Format)*;
$Ideographic = [\p{Ideographic}];
$HiraganaEx = $Hiragana ($Extend | $Format)*;
$IdeographicEx = $Ideographic ($Extend | $Format)*;
## -------------------------------------------------
!!forward;
# Rule 3 - CR x LF
#
$CR $LF;
# Rule 4 - ignore Format and Extend characters, except when they appear at the beginning
# of a region of Text. The rule here comes into play when the start of text
# begins with a group of Format chars, or with a "word" consisting of a single
# char that is not in any of the listed word break categories followed by
# format char(s), or is not a CJK dictionary character.
[^$CR $LF $Newline]? ($Extend | $Format)+;
$NumericEx {100};
$ALetterEx {200};
$HangulSyllable {200};
$KatakanaEx {400}; # note: these status values override those from rule 5
$HiraganaEx {400}; # by virtue of being numerically larger.
$IdeographicEx {400}; #
#
# rule 5
# Do not break between most letters.
#
$ALetterEx $ALetterEx {200};
# rule 6 and 7
$ALetterEx ($MidLetterEx | $MidNumLetEx) $ALetterEx {200};
# rule 8
$NumericEx $NumericEx {100};
# rule 9
$ALetterEx $NumericEx {200};
# rule 10
$NumericEx $ALetterEx {200};
# rule 11 and 12
$NumericEx ($MidNumEx | $MidNumLetEx) $NumericEx {100};
# rule 13
# to be consistent with $KanaKanji $KanaKanhi, changed
# from 300 to 400.
# See also TestRuleStatus in intltest/rbbiapts.cpp
$KatakanaEx $KatakanaEx {400};
# rule 13a/b
$ALetterEx $ExtendNumLetEx {200}; # (13a)
$NumericEx $ExtendNumLetEx {100}; # (13a)
$KatakanaEx $ExtendNumLetEx {400}; # (13a)
$ExtendNumLetEx $ExtendNumLetEx {200}; # (13a)
$ExtendNumLetEx $ALetterEx {200}; # (13b)
$ExtendNumLetEx $NumericEx {100}; # (13b)
$ExtendNumLetEx $KatakanaEx {400}; # (13b)
# rule 13c
$RI_A ($Extend|$Format)* $RI_A_End ($Extend|$Format)*;
$RI_B ($Extend|$Format)* $RI_B_End ($Extend|$Format)*;
$RI_C ($Extend|$Format)* $RI_C_End ($Extend|$Format)*;
$RI_D ($Extend|$Format)* $RI_D_End ($Extend|$Format)*;
$RI_E ($Extend|$Format)* $RI_E_End ($Extend|$Format)*;
$RI_F ($Extend|$Format)* $RI_F_End ($Extend|$Format)*;
$RI_G ($Extend|$Format)* $RI_G_End ($Extend|$Format)*;
$RI_H ($Extend|$Format)* $RI_H_End ($Extend|$Format)*;
$RI_I ($Extend|$Format)* $RI_I_End ($Extend|$Format)*;
$RI_J ($Extend|$Format)* $RI_J_End ($Extend|$Format)*;
$RI_K ($Extend|$Format)* $RI_K_End ($Extend|$Format)*;
$RI_L ($Extend|$Format)* $RI_L_End ($Extend|$Format)*;
$RI_M ($Extend|$Format)* $RI_M_End ($Extend|$Format)*;
$RI_N ($Extend|$Format)* $RI_N_End ($Extend|$Format)*;
$RI_P ($Extend|$Format)* $RI_P_End ($Extend|$Format)*;
$RI_R ($Extend|$Format)* $RI_R_End ($Extend|$Format)*;
$RI_S ($Extend|$Format)* $RI_S_End ($Extend|$Format)*;
$RI_T ($Extend|$Format)* $RI_T_End ($Extend|$Format)*;
$RI_U ($Extend|$Format)* $RI_U_End ($Extend|$Format)*;
$RI_V ($Extend|$Format)* $RI_V_End ($Extend|$Format)*;
# special handling for CJK characters: chain for later dictionary segmentation
$HangulSyllable $HangulSyllable {200};
$KanaKanji $KanaKanji {400}; # different rule status if both kana and kanji found
## -------------------------------------------------
!!reverse;
$BackALetterEx = ($Format | $Extend)* $ALetterPlus;
$BackMidNumLetEx = ($Format | $Extend)* $MidNumLet;
$BackNumericEx = ($Format | $Extend)* $Numeric;
$BackMidNumEx = ($Format | $Extend)* $MidNum;
$BackMidLetterEx = ($Format | $Extend)* $MidLetter;
$BackKatakanaEx = ($Format | $Extend)* $Katakana;
$BackHiraganaEx = ($Format | $Extend)* $Hiragana;
$BackExtendNumLetEx = ($Format | $Extend)* $ExtendNumLet;
# rule 3
$LF $CR;
# rule 4
($Format | $Extend)* [^$CR $LF $Newline]?;
# rule 5
$BackALetterEx $BackALetterEx;
# rule 6 and 7
$BackALetterEx ($BackMidLetterEx | $BackMidNumLetEx) $BackALetterEx;
# rule 8
$BackNumericEx $BackNumericEx;
# rule 9
$BackNumericEx $BackALetterEx;
# rule 10
$BackALetterEx $BackNumericEx;
# rule 11 and 12
$BackNumericEx ($BackMidNumEx | $BackMidNumLetEx) $BackNumericEx;
# rule 13
$BackKatakanaEx $BackKatakanaEx;
# rules 13 a/b
#
$BackExtendNumLetEx ($BackALetterEx | $BackNumericEx | $BackKatakanaEx | $BackExtendNumLetEx);
($BackALetterEx | $BackNumericEx | $BackKatakanaEx) $BackExtendNumLetEx;
# rule 13c
($Format|$Extend)* $RI_A_End ($Format|$Extend)* $RI_A;
($Format|$Extend)* $RI_B_End ($Format|$Extend)* $RI_B;
($Format|$Extend)* $RI_C_End ($Format|$Extend)* $RI_C;
($Format|$Extend)* $RI_D_End ($Format|$Extend)* $RI_D;
($Format|$Extend)* $RI_E_End ($Format|$Extend)* $RI_E;
($Format|$Extend)* $RI_F_End ($Format|$Extend)* $RI_F;
($Format|$Extend)* $RI_G_End ($Format|$Extend)* $RI_G;
($Format|$Extend)* $RI_H_End ($Format|$Extend)* $RI_H;
($Format|$Extend)* $RI_I_End ($Format|$Extend)* $RI_I;
($Format|$Extend)* $RI_J_End ($Format|$Extend)* $RI_J;
($Format|$Extend)* $RI_K_End ($Format|$Extend)* $RI_K;
($Format|$Extend)* $RI_L_End ($Format|$Extend)* $RI_L;
($Format|$Extend)* $RI_M_End ($Format|$Extend)* $RI_M;
($Format|$Extend)* $RI_N_End ($Format|$Extend)* $RI_N;
($Format|$Extend)* $RI_P_End ($Format|$Extend)* $RI_P;
($Format|$Extend)* $RI_R_End ($Format|$Extend)* $RI_R;
($Format|$Extend)* $RI_S_End ($Format|$Extend)* $RI_S;
($Format|$Extend)* $RI_T_End ($Format|$Extend)* $RI_T;
($Format|$Extend)* $RI_U_End ($Format|$Extend)* $RI_U;
($Format|$Extend)* $RI_V_End ($Format|$Extend)* $RI_V;
# special handling for CJK characters: chain for later dictionary segmentation
$HangulSyllable $HangulSyllable;
$KanaKanji $KanaKanji; #different rule status if both kanji and kana found
## -------------------------------------------------
!!safe_reverse;
# rule 3
($Extend | $Format)+ .?;
# rule 6
($MidLetter | $MidNumLet) $BackALetterEx;
# rule 11
($MidNum | $MidNumLet) $BackNumericEx;
# For dictionary-based break
$dictionary $dictionary;
## -------------------------------------------------
!!safe_forward;
# rule 4
($Extend | $Format)+ .?;
# rule 6
($MidLetterEx | $MidNumLetEx) $ALetterEx;
# rule 11
($MidNumEx | $MidNumLetEx) $NumericEx;
# For dictionary-based break
$dictionary $dictionary;