usetiter.h

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
* Copyright (c) 2002-2014, International Business Machines
* Corporation and others.  All Rights Reserved.
**********************************************************************
*/
#ifndef USETITER_H
#define USETITER_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include "unicode/uobject.h"
#include "unicode/unistr.h"

U_NAMESPACE_BEGIN

class UnicodeSet;
class UnicodeString;

class U_COMMON_API UnicodeSetIterator final : public UObject {
    enum { IS_STRING = -1 };

    UChar32 codepoint;

    UChar32 codepointEnd;

    const UnicodeString* string;

 public:

    UnicodeSetIterator(const UnicodeSet& set);

    UnicodeSetIterator();

    virtual ~UnicodeSetIterator();

    inline UBool isString() const;

    inline UChar32 getCodepoint() const;

    inline UChar32 getCodepointEnd() const;

    const UnicodeString& getString();

    inline UnicodeSetIterator &skipToStrings() {
        // Finish code point/range iteration.
        range = endRange;
        endElement = -1;
        nextElement = 0;
        return *this;
    }

    UBool next();

    UBool nextRange();

    void reset(const UnicodeSet& set);

    void reset();

    static UClassID U_EXPORT2 getStaticClassID();

    virtual UClassID getDynamicClassID() const override;

    // ======================= PRIVATES ===========================

private:

    // endElement and nextElements are really UChar32's, but we keep
    // them as signed int32_t's so we can do comparisons with
    // endElement set to -1.  Leave them as int32_t's.
    const UnicodeSet* set;
    int32_t endRange;
    int32_t range;
    int32_t endElement;
    int32_t nextElement;
    int32_t nextString;
    int32_t stringCount;

    UnicodeString *cpString;

    UnicodeSetIterator(const UnicodeSetIterator&) = delete;

    UnicodeSetIterator& operator=(const UnicodeSetIterator&) = delete;

    void loadRange(int32_t range);
};

inline UBool UnicodeSetIterator::isString() const {
    return codepoint < 0;
}

inline UChar32 UnicodeSetIterator::getCodepoint() const {
    return codepoint;
}

inline UChar32 UnicodeSetIterator::getCodepointEnd() const {
    return codepointEnd;
}


U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif