icu::StringCharacterIterator Class Reference

A concrete subclass of CharacterIterator that iterates over the characters (code units or code points) in a UnicodeString. More...

#include <schriter.h>

Inheritance diagram for icu::StringCharacterIterator:

Public Member Functions
	StringCharacterIterator (const UnicodeString &textStr)
	Create an iterator over the UnicodeString referred to by "textStr".
	StringCharacterIterator (const UnicodeString &textStr, int32_t textPos)
	Create an iterator over the UnicodeString referred to by "textStr".
	StringCharacterIterator (const UnicodeString &textStr, int32_t textBegin, int32_t textEnd, int32_t textPos)
	Create an iterator over the UnicodeString referred to by "textStr".
	StringCharacterIterator (const StringCharacterIterator &that)
	Copy constructor.
virtual	~StringCharacterIterator ()
	Destructor.
StringCharacterIterator &	operator= (const StringCharacterIterator &that)
	Assignment operator.
virtual bool	operator== (const ForwardCharacterIterator &that) const override
	Returns true if the iterators iterate over the same range of the same string and are pointing at the same character.
virtual StringCharacterIterator *	clone () const override
	Returns a new StringCharacterIterator referring to the same character in the same range of the same string as this one.
void	setText (const UnicodeString &newText)
	Sets the iterator to iterate over the provided string.
virtual void	getText (UnicodeString &result) override
	Copies the UnicodeString under iteration into the UnicodeString referred to by "result".
virtual UClassID	getDynamicClassID () const override
	Return a class ID for this object (not really public)
Public Member Functions inherited from icu::UCharCharacterIterator
	UCharCharacterIterator (ConstChar16Ptr textPtr, int32_t length)
	Create an iterator over the char16_t array referred to by "textPtr".
	UCharCharacterIterator (ConstChar16Ptr textPtr, int32_t length, int32_t position)
	Create an iterator over the char16_t array referred to by "textPtr".
	UCharCharacterIterator (ConstChar16Ptr textPtr, int32_t length, int32_t textBegin, int32_t textEnd, int32_t position)
	Create an iterator over the char16_t array referred to by "textPtr".
	UCharCharacterIterator (const UCharCharacterIterator &that)
	Copy constructor.
virtual	~UCharCharacterIterator ()
	Destructor.
UCharCharacterIterator &	operator= (const UCharCharacterIterator &that)
	Assignment operator.
virtual int32_t	hashCode () const override
	Generates a hash code for this iterator.
virtual char16_t	first () override
	Sets the iterator to refer to the first code unit in its iteration range, and returns that code unit.
virtual char16_t	firstPostInc () override
	Sets the iterator to refer to the first code unit in its iteration range, returns that code unit, and moves the position to the second code unit.
virtual UChar32	first32 () override
	Sets the iterator to refer to the first code point in its iteration range, and returns that code unit, This can be used to begin an iteration with next32().
virtual UChar32	first32PostInc () override
	Sets the iterator to refer to the first code point in its iteration range, returns that code point, and moves the position to the second code point.
virtual char16_t	last () override
	Sets the iterator to refer to the last code unit in its iteration range, and returns that code unit.
virtual UChar32	last32 () override
	Sets the iterator to refer to the last code point in its iteration range, and returns that code unit.
virtual char16_t	setIndex (int32_t position) override
	Sets the iterator to refer to the "position"-th code unit in the text-storage object the iterator refers to, and returns that code unit.
virtual UChar32	setIndex32 (int32_t position) override
	Sets the iterator to refer to the beginning of the code point that contains the "position"-th code unit in the text-storage object the iterator refers to, and returns that code point.
virtual char16_t	current () const override
	Returns the code unit the iterator currently refers to.
virtual UChar32	current32 () const override
	Returns the code point the iterator currently refers to.
virtual char16_t	next () override
	Advances to the next code unit in the iteration range (toward endIndex()), and returns that code unit.
virtual char16_t	nextPostInc () override
	Gets the current code unit for returning and advances to the next code unit in the iteration range (toward endIndex()).
virtual UChar32	next32 () override
	Advances to the next code point in the iteration range (toward endIndex()), and returns that code point.
virtual UChar32	next32PostInc () override
	Gets the current code point for returning and advances to the next code point in the iteration range (toward endIndex()).
virtual UBool	hasNext () override
	Returns false if there are no more code units or code points at or after the current position in the iteration range.
virtual char16_t	previous () override
	Advances to the previous code unit in the iteration range (toward startIndex()), and returns that code unit.
virtual UChar32	previous32 () override
	Advances to the previous code point in the iteration range (toward startIndex()), and returns that code point.
virtual UBool	hasPrevious () override
	Returns false if there are no more code units or code points before the current position in the iteration range.
virtual int32_t	move (int32_t delta, EOrigin origin) override
	Moves the current position relative to the start or end of the iteration range, or relative to the current position itself.
virtual int32_t	move32 (int32_t delta, EOrigin origin) override
	Moves the current position relative to the start or end of the iteration range, or relative to the current position itself.
void	setText (ConstChar16Ptr newText, int32_t newTextLength)
	Sets the iterator to iterate over a new range of text.
Public Member Functions inherited from icu::CharacterIterator
virtual	~CharacterIterator ()
	Destructor.
int32_t	setToStart ()
	Sets the iterator to refer to the first code unit or code point in its iteration range.
int32_t	setToEnd ()
	Sets the iterator to the end of its iteration range, just behind the last code unit or code point.
int32_t	startIndex () const
	Returns the numeric index in the underlying text-storage object of the character returned by first().
int32_t	endIndex () const
	Returns the numeric index in the underlying text-storage object of the position immediately BEYOND the character returned by last().
int32_t	getIndex () const
	Returns the numeric index in the underlying text-storage object of the character the iterator currently refers to (i.e., the character returned by current()).
int32_t	getLength () const
	Returns the length of the entire text in the underlying text-storage object.
Public Member Functions inherited from icu::ForwardCharacterIterator
virtual	~ForwardCharacterIterator ()
	Destructor.
bool	operator!= (const ForwardCharacterIterator &that) const
	Returns true when the iterators refer to different text-storage objects, or to different characters in the same text-storage object.
Public Member Functions inherited from icu::UObject
virtual	~UObject ()
	Destructor.

Static Public Member Functions
static UClassID	getStaticClassID ()
	Return a class ID for this class (not really public)
Static Public Member Functions inherited from icu::UCharCharacterIterator
static UClassID	getStaticClassID ()
	Return a class ID for this class (not really public)

Protected Member Functions
	StringCharacterIterator ()
	Default constructor, iteration over empty string.
Protected Member Functions inherited from icu::UCharCharacterIterator
	UCharCharacterIterator ()
	Protected constructor.
Protected Member Functions inherited from icu::CharacterIterator
	CharacterIterator ()
	Empty constructor.
	CharacterIterator (int32_t length)
	Constructor, just setting the length field in this base class.
	CharacterIterator (int32_t length, int32_t position)
	Constructor, just setting the length and position fields in this base class.
	CharacterIterator (int32_t length, int32_t textBegin, int32_t textEnd, int32_t position)
	Constructor, just setting the length, start, end, and position fields in this base class.
	CharacterIterator (const CharacterIterator &that)
	Copy constructor.
CharacterIterator &	operator= (const CharacterIterator &that)
	Assignment operator.
Protected Member Functions inherited from icu::ForwardCharacterIterator
	ForwardCharacterIterator ()
	Default constructor to be overridden in the implementing class.
	ForwardCharacterIterator (const ForwardCharacterIterator &other)
	Copy constructor to be overridden in the implementing class.
ForwardCharacterIterator &	operator= (const ForwardCharacterIterator &)
	Assignment operator to be overridden in the implementing class.

Protected Attributes
UnicodeString	text
	Copy of the iterated string object.
Protected Attributes inherited from icu::UCharCharacterIterator
const char16_t *	text
	Protected member text.
Protected Attributes inherited from icu::CharacterIterator
int32_t	textLength
	Base class text length field.
int32_t	pos
	Base class field for the current position.
int32_t	begin
	Base class field for the start of the iteration range.
int32_t	end
	Base class field for the end of the iteration range.

Additional Inherited Members
Public Types inherited from icu::CharacterIterator
enum	EOrigin { kStart , kCurrent , kEnd }
	Origin enumeration for the move() and move32() functions. More...
Public Types inherited from icu::ForwardCharacterIterator
enum	{ DONE = 0xffff }
	Value returned by most of ForwardCharacterIterator's functions when the iterator has reached the limits of its iteration. More...

Detailed Description

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 also

CharacterIterator

ForwardCharacterIterator

Stable:

ICU 2.0

Definition at line 48 of file schriter.h.

Constructor & Destructor Documentation

StringCharacterIterator() [1/5]

icu::StringCharacterIterator::StringCharacterIterator

(

const UnicodeString &

textStr

)

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.

Parameters

textStr

The unicode string used to create an iterator

Stable:

ICU 2.0

StringCharacterIterator() [2/5]

icu::StringCharacterIterator::StringCharacterIterator	(	const UnicodeString &	textStr,
		int32_t	textPos
	)

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.

Parameters

textStr	The unicode string used to create an iterator
textPos	The starting position of the iteration

Stable:

ICU 2.0

StringCharacterIterator() [3/5]

icu::StringCharacterIterator::StringCharacterIterator	(	const UnicodeString &	textStr,
		int32_t	textBegin,
		int32_t	textEnd,
		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.

Parameters

textStr	The unicode string used to create the StringCharacterIterator
textBegin	The begin position of the iteration range
textEnd	The end position of the iteration range
textPos	The starting position of the iteration

Stable:

ICU 2.0

StringCharacterIterator() [4/5]

icu::StringCharacterIterator::StringCharacterIterator

(

const StringCharacterIterator &

that

)

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.

Parameters

that	The StringCharacterIterator to be copied

Stable:

ICU 2.0

~StringCharacterIterator()

virtual icu::StringCharacterIterator::~StringCharacterIterator ( )

virtual

Destructor.

Stable:

ICU 2.0

StringCharacterIterator() [5/5]

icu::StringCharacterIterator::StringCharacterIterator ( )

protected

Default constructor, iteration over empty string.

Stable:

ICU 2.0

Member Function Documentation

clone()

virtual StringCharacterIterator * icu::StringCharacterIterator::clone ( ) const

overridevirtual

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.

Returns

the newly cloned object.

Stable:

ICU 2.0

Reimplemented from icu::UCharCharacterIterator.

getDynamicClassID()

virtual UClassID icu::StringCharacterIterator::getDynamicClassID ( ) const

overridevirtual

Return a class ID for this object (not really public)

Returns

a class ID for this object.

Stable:

ICU 2.0

Reimplemented from icu::UCharCharacterIterator.

getStaticClassID()

static UClassID icu::StringCharacterIterator::getStaticClassID ( )

static

Return a class ID for this class (not really public)

Returns

a class ID for this class

Stable:

ICU 2.0

getText()

virtual void icu::StringCharacterIterator::getText ( UnicodeString &  result )

overridevirtual

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.

Parameters

result

Receives a copy of the text under iteration.

Stable:

ICU 2.0

Reimplemented from icu::UCharCharacterIterator.

operator=()

StringCharacterIterator & icu::StringCharacterIterator::operator=

(

const StringCharacterIterator &

that

)

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.

Parameters

that	The object to be copied.

Returns

the newly created object.

Stable:

ICU 2.0

operator==()

virtual bool icu::StringCharacterIterator::operator== ( const ForwardCharacterIterator &  that ) const

overridevirtual

Returns true if the iterators iterate over the same range of the same string and are pointing at the same character.

Parameters

that	The ForwardCharacterIterator to be compared for equality

Returns

true if the iterators iterate over the same range of the same string and are pointing at the same character.

Stable:

ICU 2.0

Reimplemented from icu::UCharCharacterIterator.

setText()

void icu::StringCharacterIterator::setText

(

const UnicodeString &

newText

)

Sets the iterator to iterate over the provided string.

Parameters

newText

The string to be iterated over

Stable:

ICU 2.0

Field Documentation

text

UnicodeString icu::StringCharacterIterator::text

protected

Copy of the iterated string object.

Stable:

ICU 2.0

Definition at line 179 of file schriter.h.

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The documentation for this class was generated from the following file:

• common/unicode/schriter.h