std::__ctype_abstract_base< _CharT > Class Template Reference

Inheritance diagram for std::__ctype_abstract_base< _CharT >:

Public Types
typedef const int *	__to_type
typedef _CharT	char_type
typedef unsigned short	mask

Public Member Functions
bool	is (mask __m, char_type __c) const
const char_type *	is (const char_type *__lo, const char_type *__hi, mask *__vec) const
char	narrow (char_type __c, char __dfault) const
const char_type *	narrow (const char_type *__lo, const char_type *__hi, char __dfault, char *__to) const
const char_type *	scan_is (mask __m, const char_type *__lo, const char_type *__hi) const
const char_type *	scan_not (mask __m, const char_type *__lo, const char_type *__hi) const
char_type	tolower (char_type __c) const
const char_type *	tolower (char_type *__lo, const char_type *__hi) const
char_type	toupper (char_type __c) const
const char_type *	toupper (char_type *__lo, const char_type *__hi) const
char_type	widen (char __c) const
const char *	widen (const char *__lo, const char *__hi, char_type *__to) const

Static Public Attributes
static const mask	alnum
static const mask	alpha
static const mask	blank
static const mask	cntrl
static const mask	digit
static const mask	graph
static const mask	lower
static const mask	print
static const mask	punct
static const mask	space
static const mask	upper
static const mask	xdigit

Protected Member Functions
	__ctype_abstract_base (size_t __refs=0)
virtual bool	do_is (mask __m, char_type __c) const =0
virtual const char_type *	do_is (const char_type *__lo, const char_type *__hi, mask *__vec) const =0
virtual char	do_narrow (char_type __c, char __dfault) const =0
virtual const char_type *	do_narrow (const char_type *__lo, const char_type *__hi, char __dfault, char *__to) const =0
virtual const char_type *	do_scan_is (mask __m, const char_type *__lo, const char_type *__hi) const =0
virtual const char_type *	do_scan_not (mask __m, const char_type *__lo, const char_type *__hi) const =0
virtual char_type	do_tolower (char_type __c) const =0
virtual const char_type *	do_tolower (char_type *__lo, const char_type *__hi) const =0
virtual char_type	do_toupper (char_type __c) const =0
virtual const char_type *	do_toupper (char_type *__lo, const char_type *__hi) const =0
virtual char_type	do_widen (char __c) const =0
virtual const char *	do_widen (const char *__lo, const char *__hi, char_type *__to) const =0

Static Protected Member Functions
static __c_locale	_S_clone_c_locale (__c_locale &__cloc) throw ()
static void	_S_create_c_locale (__c_locale &__cloc, const char *__s, __c_locale __old=0)
static void	_S_destroy_c_locale (__c_locale &__cloc)
static __c_locale	_S_get_c_locale ()
static const char *	_S_get_c_name () throw ()
static __c_locale	_S_lc_ctype_c_locale (__c_locale __cloc, const char *__s)

Detailed Description

template<typename _CharT>
class std::__ctype_abstract_base< _CharT >

Common base for ctype facet.

This template class provides implementations of the public functions that forward to the protected virtual functions.

This template also provides abstract stubs for the protected virtual functions.

Definition at line 150 of file locale_facets.h.

Member Typedef Documentation

char_type

template<typename _CharT>

typedef _CharT std::__ctype_abstract_base< _CharT >::char_type

Typedef for the template parameter.

Definition at line 155 of file locale_facets.h.

Member Function Documentation

do_is() [1/2]

template<typename _CharT>

virtual bool std::__ctype_abstract_base< _CharT >::do_is ( mask  __m, char_type  __c  ) const

protectedpure virtual

Test char_type classification.

This function finds a mask M for c and compares it to mask m.

do_is() is a hook for a derived facet to change the behavior of classifying. do_is() must always return the same result for the same input.

Parameters

__c	The char_type to find the mask of.
__m	The mask to compare against.

Returns

(M & __m) != 0.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

Referenced by std::__ctype_abstract_base< wchar_t >::is().

do_is() [2/2]

template<typename _CharT>

virtual const char_type* std::__ctype_abstract_base< _CharT >::do_is ( const char_type *  __lo, const char_type *  __hi, mask *  __vec  ) const

protectedpure virtual

Return a mask array.

This function finds the mask for each char_type in the range [lo,hi) and successively writes it to vec. vec must have as many elements as the input.

do_is() is a hook for a derived facet to change the behavior of classifying. do_is() must always return the same result for the same input.

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.
__vec	Pointer to an array of mask storage.

Returns

__hi.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

do_narrow() [1/2]

template<typename _CharT>

virtual char std::__ctype_abstract_base< _CharT >::do_narrow ( char_type  __c, char  __dfault  ) const

protectedpure virtual

Narrow char_type to char.

This virtual function converts the argument to char using the simplest reasonable transformation. If the conversion fails, dfault is returned instead.

do_narrow() is a hook for a derived facet to change the behavior of narrowing. do_narrow() must always return the same result for the same input.

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters

__c	The char_type to convert.
__dfault	Char to return if conversion fails.

Returns

The converted char.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

Referenced by std::__ctype_abstract_base< wchar_t >::narrow().

do_narrow() [2/2]

template<typename _CharT>

virtual const char_type* std::__ctype_abstract_base< _CharT >::do_narrow ( const char_type *  __lo, const char_type *  __hi, char  __dfault, char *  __to  ) const

protectedpure virtual

Narrow char_type array to char.

This virtual function converts each char_type in the range [__lo,__hi) to char using the simplest reasonable transformation and writes the results to the destination array. For any element in the input that cannot be converted, __dfault is used instead.

do_narrow() is a hook for a derived facet to change the behavior of narrowing. do_narrow() must always return the same result for the same input.

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.
__dfault	Char to use if conversion fails.
__to	Pointer to the destination array.

Returns

__hi.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

do_scan_is()

template<typename _CharT>

virtual const char_type* std::__ctype_abstract_base< _CharT >::do_scan_is ( mask  __m, const char_type *  __lo, const char_type *  __hi  ) const

protectedpure virtual

Find char_type matching mask.

This function searches for and returns the first char_type c in [__lo,__hi) for which is(__m,c) is true.

do_scan_is() is a hook for a derived facet to change the behavior of match searching. do_is() must always return the same result for the same input.

Parameters

__m	The mask to compare against.
__lo	Pointer to start of range.
__hi	Pointer to end of range.

Returns

Pointer to a matching char_type if found, else __hi.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

Referenced by std::__ctype_abstract_base< wchar_t >::scan_is().

do_scan_not()

template<typename _CharT>

virtual const char_type* std::__ctype_abstract_base< _CharT >::do_scan_not ( mask  __m, const char_type *  __lo, const char_type *  __hi  ) const

protectedpure virtual

Find char_type not matching mask.

This function searches for and returns a pointer to the first char_type c of [lo,hi) for which is(m,c) is false.

do_scan_is() is a hook for a derived facet to change the behavior of match searching. do_is() must always return the same result for the same input.

Parameters

__m	The mask to compare against.
__lo	Pointer to start of range.
__hi	Pointer to end of range.

Returns

Pointer to a non-matching char_type if found, else __hi.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

Referenced by std::__ctype_abstract_base< wchar_t >::scan_not().

do_tolower() [1/2]

template<typename _CharT>

virtual char_type std::__ctype_abstract_base< _CharT >::do_tolower ( char_type  __c ) const

protectedpure virtual

Convert to lowercase.

This virtual function converts the argument to lowercase if possible. If not possible (for example, '2'), returns the argument.

do_tolower() is a hook for a derived facet to change the behavior of lowercasing. do_tolower() must always return the same result for the same input.

Parameters

__c	The char_type to convert.

Returns

The lowercase char_type if convertible, else __c.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

Referenced by std::__ctype_abstract_base< wchar_t >::tolower().

do_tolower() [2/2]

template<typename _CharT>

virtual const char_type* std::__ctype_abstract_base< _CharT >::do_tolower ( char_type *  __lo, const char_type *  __hi  ) const

protectedpure virtual

Convert array to lowercase.

This virtual function converts each char_type in the range [__lo,__hi) to lowercase if possible. Other elements remain untouched.

do_tolower() is a hook for a derived facet to change the behavior of lowercasing. do_tolower() must always return the same result for the same input.

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.

Returns

__hi.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

do_toupper() [1/2]

template<typename _CharT>

virtual char_type std::__ctype_abstract_base< _CharT >::do_toupper ( char_type  __c ) const

protectedpure virtual

Convert to uppercase.

This virtual function converts the char_type argument to uppercase if possible. If not possible (for example, '2'), returns the argument.

do_toupper() is a hook for a derived facet to change the behavior of uppercasing. do_toupper() must always return the same result for the same input.

Parameters

__c	The char_type to convert.

Returns

The uppercase char_type if convertible, else __c.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

Referenced by std::__ctype_abstract_base< wchar_t >::toupper().

do_toupper() [2/2]

template<typename _CharT>

virtual const char_type* std::__ctype_abstract_base< _CharT >::do_toupper ( char_type *  __lo, const char_type *  __hi  ) const

protectedpure virtual

Convert array to uppercase.

This virtual function converts each char_type in the range [__lo,__hi) to uppercase if possible. Other elements remain untouched.

do_toupper() is a hook for a derived facet to change the behavior of uppercasing. do_toupper() must always return the same result for the same input.

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.

Returns

__hi.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

do_widen() [1/2]

template<typename _CharT>

virtual char_type std::__ctype_abstract_base< _CharT >::do_widen ( char  __c ) const

protectedpure virtual

Widen char.

This virtual function converts the char to char_type using the simplest reasonable transformation.

do_widen() is a hook for a derived facet to change the behavior of widening. do_widen() must always return the same result for the same input.

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters

__c	The char to convert.

Returns

The converted char_type

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

Referenced by std::__ctype_abstract_base< wchar_t >::widen().

do_widen() [2/2]

template<typename _CharT>

virtual const char* std::__ctype_abstract_base< _CharT >::do_widen ( const char *  __lo, const char *  __hi, char_type *  __to  ) const

protectedpure virtual

Widen char array.

This function converts each char in the input to char_type using the simplest reasonable transformation.

do_widen() is a hook for a derived facet to change the behavior of widening. do_widen() must always return the same result for the same input.

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters

__lo	Pointer to start range.
__hi	Pointer to end of range.
__to	Pointer to the destination array.

Returns

__hi.

Implemented in std::ctype< wchar_t >, and std::ctype< _CharT >.

is() [1/2]

template<typename _CharT>

bool std::__ctype_abstract_base< _CharT >::is ( mask  __m, char_type  __c  ) const

inline

Test char_type classification.

This function finds a mask M for __c and compares it to mask __m. It does so by returning the value of ctype<char_type>::do_is().

Parameters

__c	The char_type to compare the mask of.
__m	The mask to compare against.

Returns

(M & __m) != 0.

Definition at line 169 of file locale_facets.h.

Referenced by std::time_get< _CharT, _InIter >::get().

is() [2/2]

template<typename _CharT>

const char_type* std::__ctype_abstract_base< _CharT >::is ( const char_type *  __lo, const char_type *  __hi, mask *  __vec  ) const

inline

Return a mask array.

This function finds the mask for each char_type in the range [lo,hi) and successively writes it to vec. vec must have as many elements as the char array. It does so by returning the value of ctype<char_type>::do_is().

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.
__vec	Pointer to an array of mask storage.

Returns

__hi.

Definition at line 186 of file locale_facets.h.

narrow() [1/2]

template<typename _CharT>

char std::__ctype_abstract_base< _CharT >::narrow ( char_type  __c, char  __dfault  ) const

inline

Narrow char_type to char.

This function converts the char_type to char using the simplest reasonable transformation. If the conversion fails, dfault is returned instead. It does so by returning ctype<char_type>::do_narrow(__c).

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters

__c	The char_type to convert.
__dfault	Char to return if conversion fails.

Returns

The converted char.

Definition at line 331 of file locale_facets.h.

Referenced by std::time_get< _CharT, _InIter >::get(), and std::time_put< _CharT, _OutIter >::put().

narrow() [2/2]

template<typename _CharT>

const char_type* std::__ctype_abstract_base< _CharT >::narrow ( const char_type *  __lo, const char_type *  __hi, char  __dfault, char *  __to  ) const

inline

Narrow array to char array.

This function converts each char_type in the input to char using the simplest reasonable transformation and writes the results to the destination array. For any char_type in the input that cannot be converted, dfault is used instead. It does so by returning ctype<char_type>::do_narrow(__lo, __hi, __dfault, __to).

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.
__dfault	Char to use if conversion fails.
__to	Pointer to the destination array.

Returns

__hi.

Definition at line 353 of file locale_facets.h.

scan_is()

template<typename _CharT>

const char_type* std::__ctype_abstract_base< _CharT >::scan_is ( mask  __m, const char_type *  __lo, const char_type *  __hi  ) const

inline

Find char_type matching a mask.

This function searches for and returns the first char_type c in [lo,hi) for which is(m,c) is true. It does so by returning ctype<char_type>::do_scan_is().

Parameters

__m	The mask to compare against.
__lo	Pointer to start of range.
__hi	Pointer to end of range.

Returns

Pointer to matching char_type if found, else __hi.

Definition at line 202 of file locale_facets.h.

scan_not()

template<typename _CharT>

const char_type* std::__ctype_abstract_base< _CharT >::scan_not ( mask  __m, const char_type *  __lo, const char_type *  __hi  ) const

inline

Find char_type not matching a mask.

This function searches for and returns the first char_type c in [lo,hi) for which is(m,c) is false. It does so by returning ctype<char_type>::do_scan_not().

Parameters

__m	The mask to compare against.
__lo	Pointer to first char in range.
__hi	Pointer to end of range.

Returns

Pointer to non-matching char if found, else __hi.

Definition at line 218 of file locale_facets.h.

tolower() [1/2]

template<typename _CharT>

char_type std::__ctype_abstract_base< _CharT >::tolower ( char_type  __c ) const

inline

Convert to lowercase.

This function converts the argument to lowercase if possible. If not possible (for example, '2'), returns the argument. It does so by returning ctype<char_type>::do_tolower(c).

Parameters

__c	The char_type to convert.

Returns

The lowercase char_type if convertible, else __c.

Definition at line 261 of file locale_facets.h.

Referenced by std::time_get< _CharT, _InIter >::get().

tolower() [2/2]

template<typename _CharT>

const char_type* std::__ctype_abstract_base< _CharT >::tolower ( char_type *  __lo, const char_type *  __hi  ) const

inline

Convert array to lowercase.

This function converts each char_type in the range [__lo,__hi) to lowercase if possible. Other elements remain untouched. It does so by returning ctype<char_type>:: do_tolower(__lo, __hi).

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.

Returns

__hi.

Definition at line 276 of file locale_facets.h.

toupper() [1/2]

template<typename _CharT>

char_type std::__ctype_abstract_base< _CharT >::toupper ( char_type  __c ) const

inline

Convert to uppercase.

This function converts the argument to uppercase if possible. If not possible (for example, '2'), returns the argument. It does so by returning ctype<char_type>::do_toupper().

Parameters

__c	The char_type to convert.

Returns

The uppercase char_type if convertible, else __c.

Definition at line 232 of file locale_facets.h.

Referenced by std::time_get< _CharT, _InIter >::get().

toupper() [2/2]

template<typename _CharT>

const char_type* std::__ctype_abstract_base< _CharT >::toupper ( char_type *  __lo, const char_type *  __hi  ) const

inline

Convert array to uppercase.

This function converts each char_type in the range [lo,hi) to uppercase if possible. Other elements remain untouched. It does so by returning ctype<char_type>:: do_toupper(lo, hi).

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.

Returns

__hi.

Definition at line 247 of file locale_facets.h.

widen() [1/2]

template<typename _CharT>

char_type std::__ctype_abstract_base< _CharT >::widen ( char  __c ) const

inline

Widen char to char_type.

This function converts the char argument to char_type using the simplest reasonable transformation. It does so by returning ctype<char_type>::do_widen(c).

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters

__c	The char to convert.

Returns

The converted char_type.

Definition at line 293 of file locale_facets.h.

Referenced by std::time_get< _CharT, _InIter >::do_get(), std::money_get< _CharT, _InIter >::do_get(), std::time_put< _CharT, _OutIter >::do_put(), and std::money_put< _CharT, _OutIter >::do_put().

widen() [2/2]

template<typename _CharT>

const char* std::__ctype_abstract_base< _CharT >::widen ( const char *  __lo, const char *  __hi, char_type *  __to  ) const

inline

Widen array to char_type.

This function converts each char in the input to char_type using the simplest reasonable transformation. It does so by returning ctype<char_type>::do_widen(c).

Note: this is not what you want for codepage conversions. See codecvt for that.

Parameters

__lo	Pointer to start of range.
__hi	Pointer to end of range.
__to	Pointer to the destination array.

Returns

__hi.

Definition at line 312 of file locale_facets.h.

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

• locale_facets.h