This template provides the protected virtual functions the developer will have to replace in a derived class or specialization to make a working facet. The public functions that access them are defined in __ctype_abstract_base, to allow for implementation flexibility. See ctype<wchar_t> for an example. The functions are documented in __ctype_abstract_base.
Note: implementations are provided for all the protected virtual functions, but will likely not be useful.
Definition at line 607 of file locale_facets.h.
typedef _CharT std::ctype< _CharT >::char_type |
Typedef for the template parameter.
Reimplemented from std::__ctype_abstract_base< _CharT >.
Reimplemented in std::ctype_byname< _CharT >.
Definition at line 611 of file locale_facets.h.
virtual const char_type* std::__ctype_abstract_base< _CharT >::do_is | ( | const char_type * | __lo, | |
const char_type * | __hi, | |||
mask * | __vec | |||
) | const [protected, pure virtual, 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 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. |
Implemented in std::ctype< wchar_t >.
virtual bool std::__ctype_abstract_base< _CharT >::do_is | ( | mask | __m, | |
char_type | __c | |||
) | const [protected, pure virtual, inherited] |
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.
c | The char_type to find the mask of. | |
m | The mask to compare against. |
Implemented in std::ctype< wchar_t >.
virtual const char_type* std::ctype< _CharT >::do_narrow | ( | const char_type * | __lo, | |
const char_type * | __hi, | |||
char | __dfault, | |||
char * | __dest | |||
) | const [protected, 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.
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< _CharT >.
virtual char std::ctype< _CharT >::do_narrow | ( | char_type | , | |
char | __dfault | |||
) | const [protected, 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.
c | The char_type to convert. | |
dfault | Char to return if conversion fails. |
Implements std::__ctype_abstract_base< _CharT >.
virtual const char_type* std::__ctype_abstract_base< _CharT >::do_scan_is | ( | mask | __m, | |
const char_type * | __lo, | |||
const char_type * | __hi | |||
) | const [protected, pure virtual, inherited] |
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.
m | The mask to compare against. | |
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Implemented in std::ctype< wchar_t >.
virtual const char_type* std::__ctype_abstract_base< _CharT >::do_scan_not | ( | mask | __m, | |
const char_type * | __lo, | |||
const char_type * | __hi | |||
) | const [protected, pure virtual, inherited] |
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.
m | The mask to compare against. | |
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Implemented in std::ctype< wchar_t >.
virtual const char_type* std::ctype< _CharT >::do_tolower | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [protected, 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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Implements std::__ctype_abstract_base< _CharT >.
virtual char_type std::ctype< _CharT >::do_tolower | ( | char_type | __c | ) | 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 char_type to convert. |
Implements std::__ctype_abstract_base< _CharT >.
virtual const char_type* std::ctype< _CharT >::do_toupper | ( | char_type * | __lo, | |
const char_type * | __hi | |||
) | const [protected, 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.
lo | Pointer to start of range. | |
hi | Pointer to end of range. |
Implements std::__ctype_abstract_base< _CharT >.
virtual char_type std::ctype< _CharT >::do_toupper | ( | char_type | __c | ) | const [protected, 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.
c | The char_type to convert. |
Implements std::__ctype_abstract_base< _CharT >.
virtual const char* std::ctype< _CharT >::do_widen | ( | const char * | __lo, | |
const char * | __hi, | |||
char_type * | __dest | |||
) | const [protected, 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.
lo | Pointer to start range. | |
hi | Pointer to end of range. | |
to | Pointer to the destination array. |
Implements std::__ctype_abstract_base< _CharT >.
virtual char_type std::ctype< _CharT >::do_widen | ( | char | __c | ) | const [protected, 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.
c | The char to convert. |
Implements std::__ctype_abstract_base< _CharT >.
const char_type* std::__ctype_abstract_base< _CharT >::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 181 of file locale_facets.h.
bool std::__ctype_abstract_base< _CharT >::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 164 of file locale_facets.h.
Referenced by std::money_get< _CharT, _InIter >::_M_extract(), and std::basic_istream< _CharT, _Traits >::sentry::sentry().
const char_type* std::__ctype_abstract_base< _CharT >::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 348 of file locale_facets.h.
char std::__ctype_abstract_base< _CharT >::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 326 of file locale_facets.h.
Referenced by std::time_get< _CharT, _InIter >::_M_extract_num(), std::time_get< _CharT, _InIter >::do_get_year(), and std::time_put< _CharT, _OutIter >::put().
const char_type* std::__ctype_abstract_base< _CharT >::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 197 of file locale_facets.h.
const char_type* std::__ctype_abstract_base< _CharT >::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 213 of file locale_facets.h.
Referenced by std::money_put< _CharT, _OutIter >::_M_insert().
const char_type* std::__ctype_abstract_base< _CharT >::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 271 of file locale_facets.h.
char_type std::__ctype_abstract_base< _CharT >::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 256 of file locale_facets.h.
const char_type* std::__ctype_abstract_base< _CharT >::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 242 of file locale_facets.h.
char_type std::__ctype_abstract_base< _CharT >::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 227 of file locale_facets.h.
Referenced by std::time_get< _CharT, _InIter >::_M_extract_name().
const char* std::__ctype_abstract_base< _CharT >::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 307 of file locale_facets.h.
char_type std::__ctype_abstract_base< _CharT >::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 288 of file locale_facets.h.
Referenced by std::__moneypunct_cache< _CharT, _Intl >::_M_cache(), std::__numpunct_cache< _CharT >::_M_cache(), std::num_put< _CharT, _OutIter >::_M_insert_float(), std::__pad< _CharT, _Traits >::_S_pad(), std::money_get< _CharT, _InIter >::do_get(), std::time_put< _CharT, _OutIter >::do_put(), and std::money_put< _CharT, _OutIter >::do_put().
locale::id std::ctype< _CharT >::id [static] |