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schriter.h
// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ****************************************************************************** * * Copyright (C) 1998-2005, International Business Machines * Corporation and others. All Rights Reserved. * ****************************************************************************** * * File schriter.h * * Modification History: * * Date Name Description * 05/05/99 stephen Cleaned up. ****************************************************************************** */ #ifndef SCHRITER_H #define SCHRITER_H #include "unicode/utypes.h" #if U_SHOW_CPLUSPLUS_API #include "unicode/chariter.h" #include "unicode/uchriter.h" /** * \file * \brief C++ API: String Character Iterator */ U_NAMESPACE_BEGIN /** * A concrete subclass of CharacterIterator that iterates over the * characters (code units or code points) in a UnicodeString. * It's possible not only to create an * iterator that iterates over an entire UnicodeString, but also to * create one that iterates over only a subrange of a UnicodeString * (iterators over different subranges of the same UnicodeString don't * compare equal). * @see CharacterIterator * @see ForwardCharacterIterator * @stable ICU 2.0 */ class U_COMMON_API StringCharacterIterator : public UCharCharacterIterator { public: /** * Create an iterator over the UnicodeString referred to by "textStr". * The UnicodeString object is copied. * The iteration range is the whole string, and the starting position is 0. * @param textStr The unicode string used to create an iterator * @stable ICU 2.0 */ StringCharacterIterator(const UnicodeString& textStr); /** * Create an iterator over the UnicodeString referred to by "textStr". * The iteration range is the whole string, and the starting * position is specified by "textPos". If "textPos" is outside the valid * iteration range, the behavior of this object is undefined. * @param textStr The unicode string used to create an iterator * @param textPos The starting position of the iteration * @stable ICU 2.0 */ StringCharacterIterator(const UnicodeString& textStr, int32_t textPos); /** * Create an iterator over the UnicodeString referred to by "textStr". * The UnicodeString object is copied. * The iteration range begins with the code unit specified by * "textBegin" and ends with the code unit BEFORE the code unit specified * by "textEnd". The starting position is specified by "textPos". If * "textBegin" and "textEnd" don't form a valid range on "text" (i.e., * textBegin >= textEnd or either is negative or greater than text.size()), * or "textPos" is outside the range defined by "textBegin" and "textEnd", * the behavior of this iterator is undefined. * @param textStr The unicode string used to create the StringCharacterIterator * @param textBegin The begin position of the iteration range * @param textEnd The end position of the iteration range * @param textPos The starting position of the iteration * @stable ICU 2.0 */ StringCharacterIterator(const UnicodeString& textStr, int32_t textBegin, int32_t textEnd, int32_t textPos); /** * Copy constructor. The new iterator iterates over the same range * of the same string as "that", and its initial position is the * same as "that"'s current position. * The UnicodeString object in "that" is copied. * @param that The StringCharacterIterator to be copied * @stable ICU 2.0 */ StringCharacterIterator(const StringCharacterIterator& that); /** * Destructor. * @stable ICU 2.0 */ virtual ~StringCharacterIterator(); /** * Assignment operator. *this is altered to iterate over the same * range of the same string as "that", and refers to the same * character within that string as "that" does. * @param that The object to be copied. * @return the newly created object. * @stable ICU 2.0 */ StringCharacterIterator& operator=(const StringCharacterIterator& that); /** * Returns true if the iterators iterate over the same range of the * same string and are pointing at the same character. * @param that The ForwardCharacterIterator to be compared for equality * @return true if the iterators iterate over the same range of the * same string and are pointing at the same character. * @stable ICU 2.0 */ virtual UBool operator==(const ForwardCharacterIterator& that) const; /** * Returns a new StringCharacterIterator referring to the same * character in the same range of the same string as this one. The * caller must delete the new iterator. * @return the newly cloned object. * @stable ICU 2.0 */ virtual StringCharacterIterator* clone() const; /** * Sets the iterator to iterate over the provided string. * @param newText The string to be iterated over * @stable ICU 2.0 */ void setText(const UnicodeString& newText); /** * Copies the UnicodeString under iteration into the UnicodeString * referred to by "result". Even if this iterator iterates across * only a part of this string, the whole string is copied. * @param result Receives a copy of the text under iteration. * @stable ICU 2.0 */ virtual void getText(UnicodeString& result); /** * Return a class ID for this object (not really public) * @return a class ID for this object. * @stable ICU 2.0 */ virtual UClassID getDynamicClassID(void) const; /** * Return a class ID for this class (not really public) * @return a class ID for this class * @stable ICU 2.0 */ static UClassID U_EXPORT2 getStaticClassID(void); protected: /** * Default constructor, iteration over empty string. * @stable ICU 2.0 */ StringCharacterIterator(); /** * Sets the iterator to iterate over the provided string. * @param newText The string to be iterated over * @param newTextLength The length of the String * @stable ICU 2.0 */ void setText(const char16_t* newText, int32_t newTextLength); /** * Copy of the iterated string object. * @stable ICU 2.0 */ UnicodeString text; }; U_NAMESPACE_END #endif /* U_SHOW_CPLUSPLUS_API */ #endif
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