52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
/*
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* Copyright © {1999}, International Business Machines Corporation and others. All Rights Reserved.
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**********************************************************************
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* Date Name Description
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* 11/17/99 aliu Creation.
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**********************************************************************
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*/
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#ifndef UNIFILT_H
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#define UNIFILT_H
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#include "utypes.h"
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/**
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* <code>UnicodeFilter</code> defines a protocol for selecting a
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* subset of the full range (U+0000 to U+FFFF) of Unicode characters.
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* Currently, filters are used in conjunction with classes like {@link
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* Transliterator} to only process selected characters through a
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* transformation.
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*
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* @see UnicodeFilterLogic
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*/
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class U_I18N_API UnicodeFilter {
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public:
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virtual ~UnicodeFilter();
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/**
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* Returns <tt>true</tt> for characters that are in the selected
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* subset. In other words, if a character is <b>to be
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* filtered</b>, then <tt>isIn()</tt> returns
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* <b><tt>false</tt></b>.
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*/
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virtual bool_t isIn(UChar c) const = 0;
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/**
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* Returns a copy of this object. All UnicodeFilter objects have
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* to support cloning in order to allow classes using
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* UnicodeFilters, such as Transliterator, to implement cloning.
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*/
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virtual UnicodeFilter* clone() const = 0;
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protected:
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UnicodeFilter();
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};
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inline UnicodeFilter::UnicodeFilter() {}
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inline UnicodeFilter::~UnicodeFilter() {}
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#endif
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