|WCTYPE(3P)||POSIX Programmer's Manual||WCTYPE(3P)|
wctype_t wctype(const char *property); wctype_t wctype_l(const char *property, locale_t locale);
The wctype() and wctype_l() functions are defined for valid character class names as defined in the current locale or in the locale represented by locale, respectively.
The property argument is a string identifying a generic character class for which codeset-specific type information is required. The following character class names shall be defined in all locales:
|alnum alpha blank cntrl||digit graph lower print||punct space upper xdigit|
Additional character class names defined in the locale definition file (category LC_CTYPE) can also be specified.
These functions shall return a value of type wctype_t, which can be used as the second argument to subsequent calls of iswctype() and iswctype_l().
The wctype() and wctype_l() functions shall determine values of wctype_t according to the rules of the coded character set defined by character type information in the current locale or in the locale represented by locale, respectively (category LC_CTYPE).
The values returned by wctype() shall be valid until a call to setlocale() that modifies the category LC_CTYPE.
The values returned by wctype_l() shall be valid only in calls to iswctype_l() with a locale represented by locale with the same LC_CTYPE category value.
The behavior is undefined if the locale argument to wctype_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle.
The following sections are informative.
The Base Definitions volume of POSIX.1‐2017, <wctype.h>
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|2017||IEEE/The Open Group|