cpp/string/wide/wctype

Constructs a value of type 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.

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

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