Defines the macros traditionally defined in the Standard C library header <wctype.h>.
#if <TRADITIONAL C HEADERS>
#include <wctype.h>
namespace std {
using ::iswalnum;
using ::iswalpha;
using ::iswcntrl;
using ::iswctype;
using ::iswdigit;
using ::iswgraph;
using ::iswlower;
using ::iswprint;
using ::iswpunct;
using ::iswspace;
using ::iswupper;
using ::iswxdigit;
using ::towctrans;
using ::towlower;
using ::towupper;
using ::wctrans;
using ::wctrans_t;
using ::wctype;
using ::wctype_t;
using ::wint_t;
}
#undef iswalnum
#undef iswalpha
#undef iswcntrl
#undef iswctype
#undef iswdigit
#undef iswgraph
#undef iswlower
#undef iswprint
#undef iswpunct
#undef iswspace
#undef iswupper
#undef iswxdigit
#undef towctrans
#undef towlower
#undef towupper
#undef wctrans
#undef wctype
#endif
Remarks
Including this header also ensures that the names declared with external linkage in the Standard C library header are declared in the std namespace. In this implementation, the names may or may not also be declared in the global namespace, depending on the specific translation environment.