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### 3.23 `iswpunct`—punctuation wide character test

Synopsis

         #include <wctype.h>
         int iswpunct(wint_t c);

Description
`iswpunct` is a function which classifies wide-character values that are punctuation.

Returns
`iswpunct` returns non-zero if c is a punctuation wide character.

Portability
`iswpunct` is C99.

No supporting OS subroutines are required.