1#
2# Copyright (C) 2002-2010, International Business Machines Corporation 
3# and others. All Rights Reserved.
4#
5# file:  word_POSIX.txt
6#
7# ICU Word Break Rules, POSIX locale.
8#      See Unicode Standard Annex #29.
9#      These rules are based on UAX-29 Revision 16 for Unicode 6.0
10#
11# Note:  Updates to word.txt will usually need to be merged into
12#        word_POSIX.txt and word_ja.txt also.
13
14##############################################################################
15#
16#  Character class definitions from TR 29
17#
18##############################################################################
19
20!!chain;
21
22
23#
24#  Character Class Definitions.
25#
26
27$CR           = [\p{Word_Break = CR}];
28$LF           = [\p{Word_Break = LF}];
29$Newline      = [\p{Word_Break = Newline}];
30$Extend       = [\p{Word_Break = Extend}];
31$Format       = [\p{Word_Break = Format}];
32$Katakana     = [\p{Word_Break = Katakana}];
33$ALetter      = [\p{Word_Break = ALetter}];
34$MidNumLet    = [\p{Word_Break = MidNumLet} - [.]];
35$MidLetter    = [\p{Word_Break = MidLetter} - [\:]];
36$MidNum       = [\p{Word_Break = MidNum} [.]];
37$Numeric      = [\p{Word_Break = Numeric}];
38$ExtendNumLet = [\p{Word_Break = ExtendNumLet}];
39
40
41#   Dictionary character set, for triggering language-based break engines. Currently
42#   limited to LineBreak=Complex_Context. Note that this set only works in Unicode
43#   5.0 or later as the definition of Complex_Context was corrected to include all
44#   characters requiring dictionary break.
45
46$dictionary   = [:LineBreak = Complex_Context:];
47$Control        = [\p{Grapheme_Cluster_Break = Control}]; 
48$ALetterPlus  = [$ALetter [$dictionary-$Extend-$Control]];   # Note:  default ALetter does not
49                                                             #  include the dictionary characters.
50
51#
52#  Rules 4    Ignore Format and Extend characters, 
53#             except when they appear at the beginning of a region of text.
54#
55$KatakanaEx     = $Katakana     ($Extend |  $Format)*;
56$ALetterEx      = $ALetterPlus  ($Extend |  $Format)*;
57$MidNumLetEx    = $MidNumLet    ($Extend |  $Format)*;
58$MidLetterEx    = $MidLetter    ($Extend |  $Format)*;
59$MidNumEx       = $MidNum       ($Extend |  $Format)*;
60$NumericEx      = $Numeric      ($Extend |  $Format)*;
61$ExtendNumLetEx = $ExtendNumLet ($Extend |  $Format)*;
62
63$Hiragana       = [\p{script=Hiragana}];
64$Ideographic    = [\p{Ideographic}];
65$HiraganaEx     = $Hiragana     ($Extend |  $Format)*;
66$IdeographicEx  = $Ideographic  ($Extend |  $Format)*;
67
68## -------------------------------------------------
69
70!!forward;
71
72
73# Rule 3 - CR x LF
74#
75$CR $LF;
76
77# Rule 4 - ignore Format and Extend characters, except when they appear at the beginning
78#          of a region of Text.   The rule here comes into play when the start of text
79#          begins with a group of Format chars, or with a "word" consisting of a single
80#          char that is not in any of the listed word break categories followed by
81#          format char(s).
82[^$CR $LF $Newline]? ($Extend |  $Format)+;
83
84$NumericEx {100};
85$ALetterEx {200};
86$KatakanaEx {300};       # note:  these status values override those from rule 5
87$HiraganaEx {300};       #        by virtual of being numerically larger.
88$IdeographicEx {400};    #
89
90#
91# rule 5
92#    Do not break between most letters.
93#
94$ALetterEx $ALetterEx {200};
95
96# rule 6 and 7
97$ALetterEx ($MidLetterEx | $MidNumLetEx) $ALetterEx {200};
98
99# rule 8
100
101$NumericEx $NumericEx {100};
102
103# rule 9
104
105$ALetterEx $NumericEx {200};
106
107# rule 10
108
109$NumericEx $ALetterEx {200};
110
111# rule 11 and 12 
112
113$NumericEx ($MidNumEx | $MidNumLetEx) $NumericEx {100};
114
115# rule 13
116
117$KatakanaEx  $KatakanaEx {300};
118
119# rule 13a/b
120
121$ALetterEx      $ExtendNumLetEx {200};    #  (13a)
122$NumericEx      $ExtendNumLetEx {100};    #  (13a)
123$KatakanaEx     $ExtendNumLetEx {300};    #  (13a)
124$ExtendNumLetEx $ExtendNumLetEx {200};    #  (13a)
125
126$ExtendNumLetEx $ALetterEx  {200};    #  (13b)
127$ExtendNumLetEx $NumericEx  {100};    #  (13b)
128$ExtendNumLetEx $KatakanaEx {300};    #  (13b)
129 
130
131
132## -------------------------------------------------
133
134!!reverse;
135
136$BackALetterEx     = ($Format | $Extend)* $ALetterPlus;
137$BackMidNumLetEx   = ($Format | $Extend)* $MidNumLet;
138$BackNumericEx     = ($Format | $Extend)* $Numeric;
139$BackMidNumEx      = ($Format | $Extend)* $MidNum;
140$BackMidLetterEx   = ($Format | $Extend)* $MidLetter;
141$BackKatakanaEx    = ($Format | $Extend)* $Katakana;
142$BackExtendNumLetEx= ($Format | $Extend)* $ExtendNumLet;
143
144# rule 3
145$LF $CR;
146
147# rule 4
148($Format | $Extend)*  [^$CR $LF $Newline]?;
149
150# rule 5
151
152$BackALetterEx $BackALetterEx;
153
154# rule 6 and 7
155
156$BackALetterEx ($BackMidLetterEx | $BackMidNumLetEx) $BackALetterEx;
157
158
159# rule 8
160
161$BackNumericEx $BackNumericEx;
162
163# rule 9
164
165$BackNumericEx $BackALetterEx;
166
167# rule 10
168
169$BackALetterEx $BackNumericEx;
170
171# rule 11 and 12
172
173$BackNumericEx ($BackMidNumEx | $BackMidNumLetEx) $BackNumericEx;
174
175# rule 13
176
177$BackKatakanaEx $BackKatakanaEx;
178
179# rules 13 a/b
180#
181$BackExtendNumLetEx ($BackALetterEx | $BackNumericEx | $BackKatakanaEx | $BackExtendNumLetEx);
182($BackALetterEx | $BackNumericEx | $BackKatakanaEx) $BackExtendNumLetEx; 
183
184## -------------------------------------------------
185
186!!safe_reverse;
187
188# rule 3
189($Extend | $Format)+ .?;
190
191# rule 6
192($MidLetter | $MidNumLet) $BackALetterEx;
193
194# rule 11
195($MidNum | $MidNumLet) $BackNumericEx;
196
197# For dictionary-based break
198$dictionary $dictionary;
199
200## -------------------------------------------------
201
202!!safe_forward;
203
204# rule 4
205($Extend | $Format)+ .?;
206
207# rule 6
208($MidLetterEx | $MidNumLetEx) $ALetterEx;
209
210# rule 11
211($MidNumEx | $MidNumLetEx) $NumericEx;
212
213# For dictionary-based break
214$dictionary $dictionary;
215