libstdc++
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Primary class template ctype facet.
This template class defines classification and conversion functions for character sets. It wraps cctype functionality. Ctype gets used by streams for many I/O operations.
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 >.
Definition at line 611 of file locale_facets.h.
virtual bool std::ctype< _CharT >::do_is | ( | mask | __m, |
char_type | __c | ||
) | const [protected, 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.
__c | The char_type to find the mask of. |
__m | The mask to compare against. |
Implements std::__ctype_abstract_base< _CharT >.
virtual const char_type* std::ctype< _CharT >::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 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. |
Implements std::__ctype_abstract_base< _CharT >.
virtual char std::ctype< _CharT >::do_narrow | ( | char_type | __c, |
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 >.
Referenced by std::ctype< char >::narrow().
virtual const char_type* std::ctype< _CharT >::do_narrow | ( | const char_type * | __lo, |
const char_type * | __hi, | ||
char | __dfault, | ||
char * | __to | ||
) | 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 const char_type* std::ctype< _CharT >::do_scan_is | ( | mask | __m, |
const char_type * | __lo, | ||
const char_type * | __hi | ||
) | const [protected, 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.
__m | The mask to compare against. |
__lo | Pointer to start of range. |
__hi | Pointer to end of range. |
Implements std::__ctype_abstract_base< _CharT >.
virtual const char_type* std::ctype< _CharT >::do_scan_not | ( | mask | __m, |
const char_type * | __lo, | ||
const char_type * | __hi | ||
) | const [protected, 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.
__m | The mask to compare against. |
__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 >.
Referenced by std::ctype< char >::tolower().
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_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 >.
Referenced by std::ctype< char >::toupper().
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_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 >.
Referenced by std::ctype< char >::widen().
virtual const char* std::ctype< _CharT >::do_widen | ( | const char * | __lo, |
const char * | __hi, | ||
char_type * | __to | ||
) | 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 >.
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::regex_traits< _Ch_type >::isctype(), and std::basic_istream< _CharT, _Traits >::sentry::sentry().
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.
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_put< _CharT, _OutIter >::put().
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.
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.
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 >::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 >::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.
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 >::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::money_get< _CharT, _InIter >::do_get(), std::time_put< _CharT, _OutIter >::do_put(), std::money_put< _CharT, _OutIter >::do_put(), std::regex_traits< _Ch_type >::isctype(), std::tr2::operator<<(), and std::operator<<().
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.
locale::id std::ctype< _CharT >::id [static] |
The facet id for ctype<char_type>
Definition at line 615 of file locale_facets.h.