wctrans - define wide character mappings

Syntax	#include <wctype.h> wctrans_t wctrans(const char *property);
Description	wctrans() constructs a value of type wctrans_t from property that describes a mapping between wide characters. The two strings "tolower" and "toupper" are permitted in all locales as a value of the property argument. If property identifies a mapping that is valid according to the LC_CTYPE category of the current locale, wctrans() returns a value not equal to 0 that can be used as a valid second argument in the function towctrans().
Return val.	Value != 0 0	if property identifies a valid mapping. otherwise.
Notes	This version of the C runtime system only supports 1-byte characters as wide character codes.
See also	towctrans()