The <wctype.h> header defines the following types:
wint_t As described in <wchar.h>.
wctrans_t A scalar type that can hold values th at represent locale-specific character mappings.
wctype_t As described in <wchar.h>.
The <wctype.h> header defines the following macro name:
WEOF Constant expression of type wint_t that is returned by several MSE functions to indicate end-of-file.
For all functions described in this header that accept an argument of type wint_t, the value is representable as a wchar _t or equals the value of WEOF. If this argument has any other value, the behavior is undefined.
The behavior of these functions is affected by the LC_CTYPE category of the current locale.
Inclusion of the <wctype.h> header can make visible all symbols from the headers <ctype.h>, <stdarg.h>, <stddef.h>, <stdio.h>, <stdlib.h>, <string.h>, <time.h>, and <wchar.h>.
See attributes(5) for descriptions of the following attributes:
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|
iswalpha(3C), iswctype(3C), locale.h(3HEAD), setlocale(3C), stdarg(3EXT), stddef.h(3HEAD), stdio.h(3HEAD), stdlib.h(3HEAD), string.h(3HEAD), time.h(3HEAD), towctrans(3C), towlower(3C), towupper(3C), wctrans(3C), wctype(3C), attributes(5), standards(5)