std::iswpunct

int iswpunct( std::wint_t ch );

Checks if the given wide character is a punctuation character, i.e. it is one of !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ or any punctuation character specific to the current locale.

If the value of ch is neither representable as a wchar_t nor equal to the value of the macro WEOF, the behavior is undefined.

Parameters

Return value

Non-zero value if the wide character is a punctuation character, zero otherwise.

Notes

ISO 30112 specifies which Unicode characters are include in POSIX punct category.

Example

#include <iostream>
#include <cwctype>
#include <clocale>
 
int main()
{
    wchar_t c = L'\u2051'; // Two asterisks ('⁑')
 
    std::cout << std::hex << std::showbase << std::boolalpha;
    std::cout << "in the default locale, iswpunct(" << (std::wint_t)c << ") = "
              << (bool)std::iswpunct(c) << '\n';
    std::setlocale(LC_ALL, "en_US.utf8");
    std::cout << "in Unicode locale, iswpunct(" << (std::wint_t)c << ") = "
              << (bool)std::iswpunct(c) << '\n';
}

in the default locale, iswpunct(0x2051) = false
in Unicode locale, iswpunct(0x2051) = true

See also