7.25.2.1.2 The iswalpha function

Synopsis

1

#include <wctype.h>
int iswalpha(wint_t wc);

Description

2

The iswalpha function tests for any wide character for which iswupper or iswlower is true, or any wide character that is one of a locale-specific set of alphabetic wide characters for which none of iswcntrl, iswdigit, iswpunct, or iswspace is true.[1]

Footnotes

[1]

The functions iswlower and iswupper test true or false separately for each of these additional wide characters; all four combinations are possible.