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ICU-1076 edit documentation

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X-SVN-Rev: 5400
This commit is contained in:
Alan Liu 2001-07-31 18:28:23 +00:00
parent a5e74ef787
commit 7b53dca6b5
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15
icu4c/source/i18n/unicode/unifilt.h
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@ -17,6 +17,21 @@
* Transliterator} to only process selected characters through a * Transliterator} to only process selected characters through a
* transformation. * transformation.
* *
* <p>Note: UnicodeFilter currently stubs out two pure virtual methods
* of its base class, UnicodeMatcher. These methods are toPattern()
* and matchesIndexValue(). This is done so that filter classes that
* are not actually used as matchers -- specifically, those in the
* UnicodeFilterLogic component, and those in tests -- can continue to
* work without defining these methods. As long as a filter is not
* used in an RBT during real transliteration, these methods will not
* be called. However, this breaks the UnicodeMatcher base class
* protocol, and it is not a correct solution.
*
* <p>In the future we may revisit the UnicodeMatcher / UnicodeFilter
* hierarchy and either redesign it, or simply remove the stubs in
* UnicodeFilter and force subclasses to implement the full
* UnicodeMatcher protocol.
*
* @see UnicodeFilterLogic * @see UnicodeFilterLogic
* @draft * @draft
*/ */