std::wctype

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Execution support library (C++26)

Technical specifications

Symbols index

External libraries

 

Strings library

Null-terminated strings

Byte strings

Multibyte strings

Wide strings

Classes

basic_string

basic_string_view (C++17)

char_traits

 

Null-terminated wide strings

Functions
Character manipulation
iswalnum iswalpha iswlower iswupper iswdigit iswxdigit iswblank (C++11)   wctype iswctype	iswcntrl iswgraph iswspace iswprint iswpunct towlower towupper wctrans towctrans
Conversions to numeric formats
wcstolwcstoll (C++11) wcstoulwcstoull (C++11)	wcstofwcstodwcstold (C++11)(C++11) wcstoimaxwcstouimax (C++11)(C++11)
String manipulation
wcslen wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp	wcsxfrm wcschr wcsrchr wcspbrk wcsspn wcscspn wcsstr wcstok
Array manipulation
wmemcpy wmemmove wmemcmp	wmemchr wmemset

 

Defined in header <cwctype>
std::wctype_t wctype( const char* str );

Constructs a value of type std::wctype_t that describes a LC_CTYPE category of wide character classification. It may be one of the standard classification categories, or a locale-specific category, such as "jkanji".

Parameters

str

-

C string holding the name of the desired category

The following values of str are supported in all C locales:

value of str	effect
"alnum"	identifies the category used by std::iswalnum
"alpha"	identifies the category used by std::iswalpha
"blank"	identifies the category used by std::iswblank (C++11)
"cntrl"	identifies the category used by std::iswcntrl
"digit"	identifies the category used by std::iswdigit
"graph"	identifies the category used by std::iswgraph
"lower"	identifies the category used by std::iswlower
"print"	identifies the category used by std::iswprint
"space"	identifies the category used by std::iswspace
"upper"	identifies the category used by std::iswupper
"xdigit"	identifies the category used by std::iswxdigit

Return value

std::wctype_t object suitable for use with std::iswctype to classify wide characters according to the named category of the current C locale or zero if str does not name a category supported by the current C locale.

See also

iswctype	classifies a wide character according to the specified LC_CTYPE category (function)
C documentation for wctype