NAME

std::iswupper - std::iswupper

Synopsis

Defined in header <cwctype>
int iswupper( std::wint_t ch );

Checks if the given wide character is an uppercase letter, i.e. one of
ABCDEFGHIJKLMNOPQRSTUVWXYZ or any uppercase letter 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

ch - wide character

Return value

Non-zero value if the wide character is an uppercase letter, zero otherwise.

Notes

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

Example

// Run this code

#include <iostream>
#include <cwctype>
#include <clocale>

int main()
{
wchar_t c = L'\u053d'; // Armenian capital letter xeh ('Խ')

std::cout << std::hex << std::showbase << std::boolalpha;
std::cout << "in the default locale, iswupper(" << (std::wint_t)c << ") = "
<< (bool)std::iswupper(c) << '\n';
std::setlocale(LC_ALL, "en_US.utf8");
std::cout << "in Unicode locale, iswupper(" << (std::wint_t)c << ") = "
<< (bool)std::iswupper(c) << '\n';
}

Output:

in the default locale, iswupper(0x53d) = false
in Unicode locale, iswupper(0x53d) = true

See also

isupper(std::locale) checks if a character is classified as uppercase by a locale
(function template)
isupper checks if a character is an uppercase character
(function)

ASCII values characters iscntrl isprint isspace isblank isgraph ispunct isalnum isalpha isupper islower isdigit isxdigit
decimal hexadecimal octal iswcntrl iswprint iswspace iswblank iswgraph iswpunct iswalnum iswalpha iswupper iswlower iswdigit iswxdigit 0–8 \x0–\x8 \0–\10 control codes ?? 0 0 0 0 0 0 0 0 0 0 0 0
(NUL, etc.) 9 \x9 \11 tab (\t) ?? 0 0 ?? 0 ?? 0 0 0 0 0 0 0 0 0
whitespaces 10–13 \xA–\xD \12–\15 (\n, \v, \f, ?? 0 0 ?? 0 0 0 0 0 0 0 0 0 0
\r) 14–31 \xE–\x1F \16–\37 control codes ?? 0 0 0 0 0 0 0 0 0 0 0 0 32 \x20 \40 space 0 ?? 0 ?? 0 ?? 0 0 0 0 0 0 0 0 0 33–47 \x21–\x2F \41–\57 !"#$%&'()*+,-./ 0 ?? 0 0 0 ?? 0 ?? 0 0 0 0 0 0 0 48–57 \x30–\x39 \60–\71 0123456789 0 ?? 0 0 0 ?? 0 0 ?? 0 0 0 0 ?? 0 ?? 0 58–64 \x3A–\x40 \72–\100 :;<=>?@ 0 ?? 0 0 0 ?? 0 ?? 0 0 0 0 0 0 0 65–70 \x41–\x46 \101–\106 ABCDEF 0 ?? 0 0 0 ?? 0 0 ?? 0 ?? 0 ?? 0 0 0 ?? 0 71–90 \x47–\x5A \107–\132 GHIJKLMNOP 0 ?? 0 0 0 ?? 0 0 ?? 0 ?? 0 ?? 0 0 0 0
QRSTUVWXYZ 91–96 \x5B–\x60 \133–\140 [\]^_` 0 ?? 0 0 0 ?? 0 ?? 0 0 0 0 0 0 0 97–102 \x61–\x66 \141–\146 abcdef 0 ?? 0 0 0 ?? 0 0 ?? 0 ?? 0 0 ?? 0 0 ?? 0 103–122 \x67–\x7A \147–\172 ghijklmnop 0 ?? 0 0 0 ?? 0 0 ?? 0 ?? 0 0 ?? 0 0 0
qrstuvwxyz 123–126 \x7B–\x7E \172–\176 {|}~ 0 ?? 0 0 0 ?? 0 ?? 0 0 0 0 0 0 0 127 \x7F \177 backspace ?? 0 0 0 0 0 0 0 0 0 0 0 0
character (DEL)