RWUSubString Class Reference
[Unicode String Processing]

Provides read-write access to a range of code units within a referenced RWUString. More...

#include <rw/i18n/RWUSubString.h>

List of all members.

Public Member Functions
	RWUSubString (const RWUSubString &source)
size_t	boundsCheckIndex (size_t offset) const
const RWUChar16 *	data () const
RWUChar16	operator[] (size_t offset) const
RWUChar16 &	operator[] (size_t offset)
RWUChar16	operator() (size_t offset) const
RWUChar16 &	operator() (size_t offset)
bool	isNull () const
size_t	length () const
size_t	start () const
RWUSubString &	operator= (const RWBasicUString &source)
RWUSubString &	operator= (const RWUSubString &source)
RWUSubString &	operator= (const RWUConstSubString &source)
RWUSubString &	operator= (const RWUChar16 *source)
RWUSubString &	operator= (const RWUChar32 *source)
RWUSubString &	operator= (RWUChar16 codeUnit)
RWUSubString &	operator= (RWUChar32 codeUnit)
Related Functions
(Note that these are not member functions.)
std::istream &	operator>> (std::istream &is, RWUSubString &ustr)
std::ostream &	operator<< (std::ostream &os, const RWUSubString &ustr)
bool	operator< (const RWUSubString &lhs, const RWUSubString &rhs)
bool	operator< (const RWUChar16 *lhs, const RWUSubString &rhs)
bool	operator< (const RWUSubString &lhs, const RWUChar16 *rhs)
bool	operator< (const RWUChar32 *lhs, const RWUSubString &rhs)
bool	operator< (const RWUSubString &lhs, const RWUChar32 *rhs)
bool	operator< (const RWBasicUString &lhs, const RWUSubString &rhs)
bool	operator< (const RWUSubString &lhs, const RWBasicUString &rhs)
bool	operator<= (const RWUSubString &lhs, const RWUSubString &rhs)
bool	operator<= (const RWUChar16 *lhs, const RWUSubString &rhs)
bool	operator<= (const RWUSubString &lhs, const RWUChar16 *rhs)
bool	operator<= (const RWUChar32 *lhs, const RWUSubString &rhs)
bool	operator<= (const RWUSubString &lhs, const RWUChar32 *rhs)
bool	operator<= (const RWBasicUString &lhs, const RWUSubString &rhs)
bool	operator<= (const RWUSubString &lhs, const RWBasicUString &rhs)
bool	operator== (const RWUSubString &lhs, const RWUSubString &rhs)
bool	operator== (const RWUChar16 *lhs, const RWUSubString &rhs)
bool	operator== (const RWUSubString &lhs, const RWUChar16 *rhs)
bool	operator== (const RWUChar32 *lhs, const RWUSubString &rhs)
bool	operator== (const RWUSubString &lhs, const RWUChar32 *rhs)
bool	operator== (const RWBasicUString &lhs, const RWUSubString &rhs)
bool	operator== (const RWUSubString &lhs, const RWBasicUString &rhs)
bool	operator!= (const RWUSubString &lhs, const RWUSubString &rhs)
bool	operator!= (const RWUChar16 *lhs, const RWUSubString &rhs)
bool	operator!= (const RWUSubString &lhs, const RWUChar16 *rhs)
bool	operator!= (const RWUChar32 *lhs, const RWUSubString &rhs)
bool	operator!= (const RWUSubString &lhs, const RWUChar32 *rhs)
bool	operator!= (const RWBasicUString &lhs, const RWUSubString &rhs)
bool	operator!= (const RWUSubString &lhs, const RWBasicUString &rhs)
bool	operator>= (const RWUSubString &lhs, const RWUSubString &rhs)
bool	operator>= (const RWUChar16 *lhs, const RWUSubString &rhs)
bool	operator>= (const RWUSubString &lhs, const RWUChar16 *rhs)
bool	operator>= (const RWUChar32 *lhs, const RWUSubString &rhs)
bool	operator>= (const RWUSubString &lhs, const RWUChar32 *rhs)
bool	operator>= (const RWBasicUString &lhs, const RWUSubString &rhs)
bool	operator>= (const RWUSubString &lhs, const RWBasicUString &rhs)
bool	operator> (const RWUSubString &lhs, const RWUSubString &rhs)
bool	operator> (const RWUChar16 *lhs, const RWUSubString &rhs)
bool	operator> (const RWUSubString &lhs, const RWUChar16 *rhs)
bool	operator> (const RWUChar32 *lhs, const RWUSubString &rhs)
bool	operator> (const RWUSubString &lhs, const RWUChar32 *rhs)
bool	operator> (const RWBasicUString &lhs, const RWUSubString &rhs)
bool	operator> (const RWUSubString &lhs, const RWBasicUString &rhs)

---

Detailed Description

RWUSubString allows read-write access to a range of code units within a referenced RWUString. The range is defined by a starting position and an length within the referenced string. For example, the 7th through the 11th elements, inclusive, would have a starting position of 7 and an extent of 5.

There are no public constructors. RWUSubString instances are constructed by various functions of the RWUString class. Typically, substrings are created and used anonymously, then destroyed immediately.

RWUSubString performs bounds checking in all methods that accept an offset value. These methods throw an RWBoundsErr exception if an offset exceeds the current bounds of the substring.

Examples

 #include <rw/i18n/RWUString.h>
 #include <rw/i18n/RWUSubString.h>
 #include <rw/i18n/RWUConversionContext.h>
 #include <iostream>
 
 using std::cout;
 using std::endl;
 
 int
 main()
 {
   // Indicate that source and target strings are
   // encoded as ISO8859-1.
   RWUConversionContext context("ISO8859-1");
 
   // Initialize a Unicode string.
   RWUString str("Encoded as Latin-1");
 
   // Modify a substring.
   str(11, 5) = "ISO8859";
 
   // Print the result.
   cout << str << endl;
 
   return 0;
 } // main

Program Output:

 Encoded as ISO8859-1

---

Constructor & Destructor Documentation

RWUSubString::RWUSubString

(

const RWUSubString &

source

)

[inline]

Constructs an RWUSubString from source.

---

Member Function Documentation

size_t RWUSubString::boundsCheckIndex

(

size_t

offset

)

const [inline]

Returns offset if the value is in bounds.

Exceptions:

RWBoundsErr

Thrown if self is a null substring or if offset is greater than or equal to length()

const RWUChar16 * RWUSubString::data

(

)

const [inline]

Returns a pointer to the string contents referenced by self.

The storage referenced by this pointer is owned by the RWUString associated with this substring. This storage may not be deleted or modified. The pointer becomes invalid if the RWUString is modified or destroyed.

Exceptions:

RWBoundsErr

Thrown if self is a null substring.

bool RWUSubString::isNull

(

void

)

const [inline]

Returns true if the substring defined by self is null or empty; otherwise, false.

size_t RWUSubString::length

(

)

const [inline]

Returns the number of code units in the substring defined by self.

RWUChar16 & RWUSubString::operator()

(

size_t

offset

)

[inline]

Returns a reference object that provides read-write access to the code unit located at index offset within self. The result can be used as an RWUChar16 value, or as an l-value in an RWUChar16 assignment expression. The value of offset must be less than length().

Exceptions:

RWBoundsErr

Thrown if self is a null substring, or if offset is greater than or equal to length().

RWUChar16 RWUSubString::operator()

(

size_t

offset

)

const [inline]

Returns the code unit located at index offset within self. The value of offset must be less than length().

Exceptions:

RWBoundsErr

Thrown if self is a null substring, or if offset is greater than or equal to length().

RWUSubString & RWUSubString::operator=

(

RWUChar32

codeUnit

)

[inline]

Replaces the substring defined by self with codeUnit.

RWUSubString & RWUSubString::operator=

(

RWUChar16

codeUnit

)

[inline]

Replaces the substring defined by self with codeUnit.

RWUSubString & RWUSubString::operator=

(

const RWUChar32 *

source

)

[inline]

Replaces the substring defined by self with the null-terminated array source.

RWUSubString & RWUSubString::operator=

(

const RWUChar16 *

source

)

[inline]

Replaces the substring defined by self with the null-terminated array source.

RWUSubString & RWUSubString::operator=

(

const RWUConstSubString &

source

)

[inline]

Replaces the substring defined by self with source.

RWUSubString & RWUSubString::operator=

(

const RWUSubString &

source

)

[inline]

Replaces the substring defined by self with source.

RWUSubString & RWUSubString::operator=

(

const RWBasicUString &

source

)

[inline]

Replaces the substring defined by self with source.

RWUChar16 & RWUSubString::operator[]

(

size_t

offset

)

[inline]

Returns a reference object that provides read-write access to the code unit located at index offset within self. The result can be used as an RWUChar16 value, or as an l-value in an RWUChar16 assignment expression. The value of offset must be less than length().

Exceptions:

RWBoundsErr

Thrown if self is a null substring, or if offset is greater than or equal to length().

RWUChar16 RWUSubString::operator[]

(

size_t

offset

)

const [inline]

Returns the code unit located at index offset within self. The value of offset must be less than length().

Exceptions:

RWBoundsErr

Thrown if self is a null substring, or if offset is greater than or equal to length().

size_t RWUSubString::start

(

)

const [inline]

Returns the start position of the substring defined by self within the RWUString referenced by self. A return value of RW_NPOS indicates that self is a null substring.

---

Friends And Related Function Documentation

bool operator!=	(	const RWUSubString &	lhs,
		const RWBasicUString &	rhs
	)			[related]

Returns true if lhs does not have the same length as, or lexigraphically differs from, rhs; otherwise, false. This operator represents the logical negation of operator==.

bool operator!=	(	const RWBasicUString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs does not have the same length as, or lexigraphically differs from, rhs; otherwise, false. This operator represents the logical negation of operator==.

bool operator!=	(	const RWUSubString &	lhs,
		const RWUChar32 *	rhs
	)			[related]

Returns true if lhs does not have the same length as, or lexigraphically differs from, rhs; otherwise, false. This operator represents the logical negation of operator==.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator!=	(	const RWUChar32 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs does not have the same length as, or lexigraphically differs from, rhs; otherwise, false. This operator represents the logical negation of operator==.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator!=	(	const RWUSubString &	lhs,
		const RWUChar16 *	rhs
	)			[related]

Returns true if lhs does not have the same length as, or lexigraphically differs from, rhs; otherwise, false. This operator represents the logical negation of operator==.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator!=	(	const RWUChar16 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs does not have the same length as, or lexigraphically differs from, rhs; otherwise, false. This operator represents the logical negation of operator==.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator!=	(	const RWUSubString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs does not have the same length as, or lexigraphically differs from, rhs; otherwise, false. Also returns false if both substrings are invalid. This operator represents the logical negation of operator==.

bool operator<	(	const RWUSubString &	lhs,
		const RWBasicUString &	rhs
	)			[related]

Returns true if lhs is lexigraphically less than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

bool operator<	(	const RWBasicUString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically less than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

bool operator<	(	const RWUSubString &	lhs,
		const RWUChar32 *	rhs
	)			[related]

Returns true if lhs is lexigraphically less than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator<	(	const RWUChar32 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically less than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator<	(	const RWUSubString &	lhs,
		const RWUChar16 *	rhs
	)			[related]

Returns true if lhs is lexigraphically less than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator<	(	const RWUChar16 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically less than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator<	(	const RWUSubString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically less than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

std::ostream & operator<<	(	std::ostream &	os,
		const RWUSubString &	ustr
	)			[related]

Writes the sequence of bytes to std::ostream that are produced when the contents of ustr are converted into the character encoding scheme specified by the currently active target RWUFromUnicodeConversionContext.

If os.width() is greater than the number of code points contained in the source string, the output is padded using a single space fill character (U+0020). If os.width() is less than the number of code points contained the source string, the entire contents of the string are inserted into the output stream. Any padding is inserted after the string if the std::ios_base::left format flag is set, or before if std::ios_base::right is set or if neither flag is set.

Exceptions:

	RWUException	Thrown to report conversion errors.
	std::ios_base::failure	Thrown to report any errors detected while performing stream operations.

bool operator<=	(	const RWUSubString &	lhs,
		const RWBasicUString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

bool operator<=	(	const RWBasicUString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

bool operator<=	(	const RWUSubString &	lhs,
		const RWUChar32 *	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator<=	(	const RWUChar32 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator<=	(	const RWUSubString &	lhs,
		const RWUChar16 *	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator<=	(	const RWUChar16 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator<=	(	const RWUSubString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false. Returns true if both substrings are null. If the two strings are identical over the length of the shortest string, then the shorter string is considered less than the longer string.

bool operator==	(	const RWUSubString &	lhs,
		const RWBasicUString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false.

bool operator==	(	const RWBasicUString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false.

bool operator==	(	const RWUSubString &	lhs,
		const RWUChar32 *	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator==	(	const RWUChar32 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator==	(	const RWUSubString &	lhs,
		const RWUChar16 *	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator==	(	const RWUChar16 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator==	(	const RWUSubString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs has the same length and is lexigraphically identical to rhs; otherwise, false.

bool operator>	(	const RWUSubString &	lhs,
		const RWBasicUString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

bool operator>	(	const RWBasicUString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

bool operator>	(	const RWUSubString &	lhs,
		const RWUChar32 *	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator>	(	const RWUChar32 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator>	(	const RWUSubString &	lhs,
		const RWUChar16 *	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator>	(	const RWUChar16 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator>	(	const RWUSubString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

bool operator>=	(	const RWUSubString &	lhs,
		const RWBasicUString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than or equal to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

bool operator>=	(	const RWBasicUString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than or equal to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

bool operator>=	(	const RWUSubString &	lhs,
		const RWUChar32 *	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than or equal to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator>=	(	const RWUChar32 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than or equal to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodePoints() in that case.

bool operator>=	(	const RWUSubString &	lhs,
		const RWUChar16 *	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than or equal to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

The rhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator>=	(	const RWUChar16 *	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than or equal to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

The lhs string must be null-terminated. This method cannot be used to compare strings containing embedded nulls; use RWBasicUString::compareCodeUnits() in that case.

bool operator>=	(	const RWUSubString &	lhs,
		const RWUSubString &	rhs
	)			[related]

Returns true if lhs is lexigraphically greater than or equal to rhs; otherwise, false. If the two strings are identical over the length of the shortest string, then the longer string is considered greater than the shorter string.

std::istream & operator>>	(	std::istream &	is,
		RWUSubString &	ustr
	)			[related]

Reads an encoded byte stream from std::istream. The byte sequence is converted into UTF-16 using the currently active RWUToUnicodeConversionContext. Leading whitespace is always skipped before storing any code points, regardless of the std::ios::skipws format flag setting. Code points are then extracted until:

• is.width() code points are read, if is.width() is greater than zero
• a whitespace code point is read
• the end of the input sequence is reached

The following Unicode characters are treated as whitespace delimiters:

• U+0009 HORIZONTAL TABULATION
• U+000A LINE FEED
• U+000B VERTICAL TABULATION
• U+000C FORM FEED
• U+000D CARRIAGE RETURN
• U+001C FILE SEPARATOR
• U+001D GROUP SEPARATOR
• U+001E RECORD SEPARATOR
• U+001F UNIT SEPARATOR
• U+0020 SPACE
• U+0085 NEXT LINE
• U+1680 OGHAM SPACE MARK
• U+2000 EN QUAD
• U+2001 EM QUAD
• U+2002 EN SPACE
• U+2003 EM SPACE
• U+2004 THREE-PER-EM SPACE
• U+2005 FOUR-PER-EM SPACE
• U+2006 SIX-PER-EM SPACE
• U+2007 FIGURE SPACE
• U+2008 PUNCTUATION SPACE
• U+2009 THIN SPACE
• U+200A HAIR SPACE
• U+200B ZERO WIDTH SPACE
• U+2028 LINE SEPARATOR
• U+2029 PARAGRAPH SEPARATOR
• U+3000 IDEOGRAPHIC SPACE

Unlike standard extractors, this extractor must consume and discard the trailing whitespace delimiter. This behavior is due to the nature of the UTF-8 encoding scheme, which requires multiple bytes to encode some whitespace characters. For the same reason, this extractor cannot support the the noskipws condition where the std::ios_base::skipws formate flag has been cleared; each extraction will consume one whitespace character. A whitespace manipulator is not provide either, since such a manipulater would consume the first non-whitespace character following a sequence of whitespace characters.

Exceptions:

	RWUException	Thrown to report conversion errors.
	std::ios_base::failure	Thrown to report any errors detected while performing stream operations.