std::iswgraph

int iswgraph( std::wint_t ch );

Checks if the given wide character has a graphical representation, i.e. it is either a number (0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz), a punctuation character(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~) or any graphical character specific to the current C 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 has a graphical representation character, zero otherwise.

Notes

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

Example

#include <iostream>
#include <cwctype>
#include <clocale>
 
int main()
{
    wchar_t c = L'\u2602'; // the Unicode character Umbrella ('☂')
 
    std::cout << std::hex << std::showbase << std::boolalpha;
    std::cout << "in the default locale, iswgraph(" << (std::wint_t)c << ") = "
              << (bool)std::iswgraph(c) << '\n';
    std::setlocale(LC_ALL, "en_US.utf8");
    std::cout << "in Unicode locale, iswgraph(" << (std::wint_t)c << ") = "
              << (bool)std::iswgraph(c) << '\n';
}

in the default locale, iswgraph(0x2602) = false
in Unicode locale, iswgraph(0x2602) = true

See also