The ctype<wchar_t> specialization. More...
The ctype<wchar_t> specialization.
This class defines classification and conversion functions for the wchar_t type. It gets used by wchar_t streams for many I/O operations. The wchar_t specialization provides a number of optimizations as well.
ctype<wchar_t> inherits its public methods from __ctype_abstract_base<wchar_t>.
Definition at line 1175 of file locale_facets.h.
typedef wchar_t std::ctype< wchar_t >::char_type |
Typedef for the template parameter wchar_t.
Reimplemented from std::__ctype_abstract_base< wchar_t >.
Definition at line 1180 of file locale_facets.h.
std::ctype< wchar_t >::ctype | ( | size_t | __refs = 0 |
) | [explicit] |
Constructor performs initialization.
This is the constructor provided by the standard.
refs | Passed to the base facet class. |
std::ctype< wchar_t >::ctype | ( | __c_locale | __cloc, | |
size_t | __refs = 0 | |||
) | [explicit] |
virtual std::ctype< wchar_t >::~ctype | ( | ) | [protected, virtual] |
Destructor.
virtual const char_type* std::ctype< wchar_t >::do_is | ( | const char_type * | __lo, | |
const char_type * | __hi, | |||
mask * | __vec | |||
) | const [protected, virtual] |
Return a mask array.
This function finds the mask for each wchar_t 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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. | |
vec | Pointer to an array of mask storage. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual bool std::ctype< wchar_t >::do_is | ( | mask | __m, | |
char_type | __c | |||
) | const [protected, virtual] |
Test wchar_t 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.
c | The wchar_t to find the mask of. | |
m | The mask to compare against. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual const char_type* std::ctype< wchar_t >::do_narrow | ( | const char_type * | __lo, | |
const char_type * | __hi, | |||
char | __dfault, | |||
char * | __dest | |||
) | const [protected, virtual] |
Narrow wchar_t array to char array.
This virtual function converts each wchar_t in the range [lo,hi) to char using the simplest reasonable transformation and writes the results to the destination array. For any wchar_t in the input that cannot be converted, dfault is used instead. For an underived ctype<wchar_t> facet, the argument will be copied, casting each element to char.
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.
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. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual char std::ctype< wchar_t >::do_narrow | ( | char_type | , | |
char | __dfault | |||
) | const [protected, virtual] |
Narrow wchar_t to char.
This virtual function converts the argument to char using the simplest reasonable transformation. If the conversion fails, dfault is returned instead. For an underived ctype<wchar_t> facet, c will be cast to char and returned.
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.
c | The wchar_t to convert. | |
dfault | Char to return if conversion fails. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual const char_type* std::ctype< wchar_t >::do_scan_is | ( | mask | __m, | |
const char_type * | __lo, | |||
const char_type * | __hi | |||
) | const [protected, virtual] |
Find wchar_t matching mask.
This function searches for and returns the first wchar_t 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.
m | The mask to compare against. | |
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual const char_type* std::ctype< wchar_t >::do_scan_not | ( | mask | __m, | |
const char_type * | __lo, | |||
const char_type * | __hi | |||
) | const [protected, virtual] |
Find wchar_t not matching mask.
This function searches for and returns a pointer to the first wchar_t 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.
m | The mask to compare against. | |
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual const char_type* std::ctype< wchar_t >::do_tolower | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [protected, virtual] |
Convert array to lowercase.
This virtual function converts each wchar_t 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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual char_type std::ctype< wchar_t >::do_tolower | ( | char_type | ) | const [protected, 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.
c | The wchar_t to convert. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual const char_type* std::ctype< wchar_t >::do_toupper | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [protected, virtual] |
Convert array to uppercase.
This virtual function converts each wchar_t 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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual char_type std::ctype< wchar_t >::do_toupper | ( | char_type | ) | const [protected, virtual] |
Convert to uppercase.
This virtual function converts the wchar_t 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.
c | The wchar_t to convert. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual const char* std::ctype< wchar_t >::do_widen | ( | const char * | __lo, | |
const char * | __hi, | |||
char_type * | __dest | |||
) | const [protected, virtual] |
Widen char array to wchar_t array.
This function converts each char in the input to wchar_t using the simplest reasonable transformation. For an underived ctype<wchar_t> facet, the argument will be copied, casting each element to wchar_t.
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.
lo | Pointer to start range. | |
hi | Pointer to end of range. | |
to | Pointer to the destination array. |
Implements std::__ctype_abstract_base< wchar_t >.
virtual char_type std::ctype< wchar_t >::do_widen | ( | char | ) | const [protected, virtual] |
Widen char to wchar_t.
This virtual function converts the char to wchar_t using the simplest reasonable transformation. For an underived ctype<wchar_t> facet, the argument will be cast to wchar_t.
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.
c | The char to convert. |
Implements std::__ctype_abstract_base< wchar_t >.
const char_type* std::__ctype_abstract_base< wchar_t >::is | ( | const char_type * | __lo, | |
const char_type * | __hi, | |||
mask * | __vec | |||
) | const [inline, inherited] |
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().
lo | Pointer to start of range. | |
hi | Pointer to end of range. | |
vec | Pointer to an array of mask storage. |
Definition at line 179 of file locale_facets.h.
bool std::__ctype_abstract_base< wchar_t >::is | ( | mask | __m, | |
char_type | __c | |||
) | const [inline, inherited] |
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().
c | The char_type to compare the mask of. | |
m | The mask to compare against. |
Definition at line 162 of file locale_facets.h.
const char_type* std::__ctype_abstract_base< wchar_t >::narrow | ( | const char_type * | __lo, | |
const char_type * | __hi, | |||
char | __dfault, | |||
char * | __to | |||
) | const [inline, inherited] |
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.
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. |
Definition at line 346 of file locale_facets.h.
char std::__ctype_abstract_base< wchar_t >::narrow | ( | char_type | __c, | |
char | __dfault | |||
) | const [inline, inherited] |
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.
c | The char_type to convert. | |
dfault | Char to return if conversion fails. |
Definition at line 324 of file locale_facets.h.
const char_type* std::__ctype_abstract_base< wchar_t >::scan_is | ( | mask | __m, | |
const char_type * | __lo, | |||
const char_type * | __hi | |||
) | const [inline, inherited] |
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().
m | The mask to compare against. | |
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Definition at line 195 of file locale_facets.h.
const char_type* std::__ctype_abstract_base< wchar_t >::scan_not | ( | mask | __m, | |
const char_type * | __lo, | |||
const char_type * | __hi | |||
) | const [inline, inherited] |
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().
m | The mask to compare against. | |
lo | Pointer to first char in range. | |
hi | Pointer to end of range. |
Definition at line 211 of file locale_facets.h.
const char_type* std::__ctype_abstract_base< wchar_t >::tolower | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [inline, inherited] |
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).
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Definition at line 269 of file locale_facets.h.
char_type std::__ctype_abstract_base< wchar_t >::tolower | ( | char_type | __c | ) | const [inline, inherited] |
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).
c | The char_type to convert. |
Definition at line 254 of file locale_facets.h.
const char_type* std::__ctype_abstract_base< wchar_t >::toupper | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [inline, inherited] |
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).
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Definition at line 240 of file locale_facets.h.
char_type std::__ctype_abstract_base< wchar_t >::toupper | ( | char_type | __c | ) | const [inline, inherited] |
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().
c | The char_type to convert. |
Definition at line 225 of file locale_facets.h.
const char* std::__ctype_abstract_base< wchar_t >::widen | ( | const char * | __lo, | |
const char * | __hi, | |||
char_type * | __to | |||
) | const [inline, inherited] |
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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. | |
to | Pointer to the destination array. |
Definition at line 305 of file locale_facets.h.
char_type std::__ctype_abstract_base< wchar_t >::widen | ( | char | __c | ) | const [inline, inherited] |
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.
c | The char to convert. |
Definition at line 286 of file locale_facets.h.
locale::id std::ctype< wchar_t >::id [static] |
The facet id for ctype<wchar_t>.
Definition at line 1198 of file locale_facets.h.