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84 lines
2.4 KiB
84 lines
2.4 KiB
# Copyright (C) 2016 and later: Unicode, Inc. and others.
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# License & terms of use: http://www.unicode.org/copyright.html
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#
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# Copyright (C) 2002-2015, International Business Machines Corporation and others.
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# All Rights Reserved.
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#
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# file: sent.txt
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#
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# ICU Sentence Break Rules
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# See Unicode Standard Annex #29.
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# These rules are based on UAX #29 Revision 34 for Unicode Version 12.0
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#
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!!quoted_literals_only;
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#
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# Character categories as defined in TR 29
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#
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$CR = [\p{Sentence_Break = CR}];
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$LF = [\p{Sentence_Break = LF}];
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$Extend = [\p{Sentence_Break = Extend}];
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$Sep = [\p{Sentence_Break = Sep}];
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$Format = [\p{Sentence_Break = Format}];
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$Sp = [\p{Sentence_Break = Sp}];
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$Lower = [\p{Sentence_Break = Lower}];
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$Upper = [\p{Sentence_Break = Upper}];
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$OLetter = [\p{Sentence_Break = OLetter}];
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$Numeric = [\p{Sentence_Break = Numeric}];
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$ATerm = [\p{Sentence_Break = ATerm}];
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$SContinue = [\p{Sentence_Break = SContinue}];
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$STerm = [\p{Sentence_Break = STerm}];
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$Close = [\p{Sentence_Break = Close}];
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#
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# Define extended forms of the character classes,
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# incorporate trailing Extend or Format chars.
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# Rules 4 and 5.
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$SpEx = $Sp ($Extend | $Format)*;
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$LowerEx = $Lower ($Extend | $Format)*;
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$UpperEx = $Upper ($Extend | $Format)*;
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$OLetterEx = $OLetter ($Extend | $Format)*;
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$NumericEx = $Numeric ($Extend | $Format)*;
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$ATermEx = $ATerm ($Extend | $Format)*;
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$SContinueEx= $SContinue ($Extend | $Format)*;
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$STermEx = $STerm ($Extend | $Format)*;
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$CloseEx = $Close ($Extend | $Format)*;
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## -------------------------------------------------
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!!chain;
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# Rule 3 - break after separators. Keep CR/LF together.
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#
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$CR $LF;
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# Rule 4 - Break after $Sep.
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# Rule 5 - Ignore $Format and $Extend
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#
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[^$Sep $CR $LF]? ($Extend | $Format)*;
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# Rule 6
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$ATermEx $NumericEx;
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# Rule 7
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($UpperEx | $LowerEx) $ATermEx $UpperEx;
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#Rule 8
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$NotLettersEx = [^$OLetter $Upper $Lower $Sep $CR $LF $ATerm $STerm] ($Extend | $Format)*;
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$ATermEx $CloseEx* $SpEx* $NotLettersEx* $Lower;
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# Rule 8a
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($STermEx | $ATermEx) $CloseEx* $SpEx* ($SContinueEx | $STermEx | $ATermEx);
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#Rule 9, 10, 11
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($STermEx | $ATermEx) $CloseEx* $SpEx* ($Sep | $CR | $LF)?;
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#Rule 998
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[[^$STerm $ATerm $Close $Sp $Sep $LF $CR $Format $Extend]{bof}] ($Extend | $Format | $Close | $Sp)* .;
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[[^$STerm $ATerm $Close $Sp $Sep $LF $CR $Format $Extend]{bof}] ($Extend | $Format | $Close | $Sp)* ([$Sep $LF $CR {eof}] | $CR $LF){100};
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