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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
* Copyright (c) 2002-2005, International Business Machines Corporation
* and others. All Rights Reserved.
**********************************************************************
* Date Name Description
* 01/14/2002 aliu Creation.
**********************************************************************
*/
#ifndef UNIFUNCT_H
#define UNIFUNCT_H
#include "unicode/utypes.h"
#if U_SHOW_CPLUSPLUS_API
#include "unicode/uobject.h"
/**
* \file
* \brief C++ API: Unicode Functor
*/
U_NAMESPACE_BEGIN
class UnicodeMatcher;
class UnicodeReplacer;
class TransliterationRuleData;
/**
* <code>UnicodeFunctor</code> is an abstract base class for objects
* that perform match and/or replace operations on Unicode strings.
* @author Alan Liu
* @stable ICU 2.4
*/
class U_COMMON_API UnicodeFunctor : public UObject {
public:
/**
* Destructor
* @stable ICU 2.4
*/
virtual ~UnicodeFunctor();
/**
* Return a copy of this object. All UnicodeFunctor objects
* have to support cloning in order to allow classes using
* UnicodeFunctor to implement cloning.
* @stable ICU 2.4
*/
virtual UnicodeFunctor* clone() const = 0;
/**
* Cast 'this' to a UnicodeMatcher* pointer and return the
* pointer, or null if this is not a UnicodeMatcher*. Subclasses
* that mix in UnicodeMatcher as a base class must override this.
* This protocol is required because a pointer to a UnicodeFunctor
* cannot be cast to a pointer to a UnicodeMatcher, since
* UnicodeMatcher is a mixin that does not derive from
* UnicodeFunctor.
* @stable ICU 2.4
*/
virtual UnicodeMatcher* toMatcher() const;
/**
* Cast 'this' to a UnicodeReplacer* pointer and return the
* pointer, or null if this is not a UnicodeReplacer*. Subclasses
* that mix in UnicodeReplacer as a base class must override this.
* This protocol is required because a pointer to a UnicodeFunctor
* cannot be cast to a pointer to a UnicodeReplacer, since
* UnicodeReplacer is a mixin that does not derive from
* UnicodeFunctor.
* @stable ICU 2.4
*/
virtual UnicodeReplacer* toReplacer() const;
/**
* Return the class ID for this class. This is useful only for
* comparing to a return value from getDynamicClassID().
* @return The class ID for all objects of this class.
* @stable ICU 2.0
*/
static UClassID U_EXPORT2 getStaticClassID();
/**
* Returns a unique class ID <b>polymorphically</b>. This method
* is to implement a simple version of RTTI, since not all C++
* compilers support genuine RTTI. Polymorphic operator==() and
* clone() methods call this method.
*
* <p>Concrete subclasses of UnicodeFunctor should use the macro
* UOBJECT_DEFINE_RTTI_IMPLEMENTATION from uobject.h to
* provide definitions getStaticClassID and getDynamicClassID.
*
* @return The class ID for this object. All objects of a given
* class have the same class ID. Objects of other classes have
* different class IDs.
* @stable ICU 2.4
*/
virtual UClassID getDynamicClassID() const override = 0;
/**
* Set the data object associated with this functor. The data
* object provides context for functor-to-standin mapping. This
* method is required when assigning a functor to a different data
* object. This function MAY GO AWAY later if the architecture is
* changed to pass data object pointers through the API.
* @internal ICU 2.1
*/
virtual void setData(const TransliterationRuleData*) = 0;
protected:
/**
* Since this class has pure virtual functions,
* a constructor can't be used.
* @stable ICU 2.0
*/
/*UnicodeFunctor();*/
};
/*inline UnicodeFunctor::UnicodeFunctor() {}*/
U_NAMESPACE_END
#endif /* U_SHOW_CPLUSPLUS_API */
#endif
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