std::iswgraph - cppreference.com (original) (raw)

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.

[edit] Parameters

[edit] Return value

Non-zero value if the wide character has a graphical representation character, zero otherwise.

[edit] Notes

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

[edit] Example

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

Output:

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

[edit] See also