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

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

[edit] Notes

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

[edit] Example

#include #include #include   void demo_iswprint(std::string_view rem, const std::wint_t c) { std::cout << std::boolalpha << std::hex << std::showbase << rem << "iswprint('" << c << "') = " << !!std::iswprint(c) << '\n'; }   int main() { const wchar_t c1 = L'\u2002'; // en-space const wchar_t c2 = L'\u0082'; // break permitted   demo_iswprint("In default locale:\n", c1);   std::setlocale(LC_ALL, "en_US.utf8"); demo_iswprint("In Unicode locale:\n", c1); demo_iswprint("", c2); }

Possible output:

In default locale: iswprint('0x2002') = false In Unicode locale: iswprint('0x2002') = true iswprint('0x82') = false

[edit] See also