std::iswgraph(3)

NAME
std::iswgraph - std::iswgraph

Synopsis
   Defined in header <cwctype>
   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
   ch - wide character

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
// Run this code
 #include <iostream>
 #include <cwctype>
 #include <clocale>
 int main()
 {
     wchar_t c = L'\u2602'; // the Unicode character Umbrella ('â˜‚')
     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';
 }

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

See also
   isgraph(std::locale) checks if a character is classfied as graphical by a locale
                        (function template)
   isgraph checks if a character is a graphical 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 0â€“8 \x0â€“\x8 \0â€“\10 control codes â‰ 0 0 0 0 0 0 0 0 0 0 0 0
                        (NUL, etc.) 9 \x9 \11 tab (\t) â‰ 0 0 â‰ 0 â‰ 0 0 0 0 0 0 0 0 0
                        whitespaces 10â€“13 \xAâ€“\xD \12â€“\15 (\n, \v, \f, â‰ 0 0 â‰ 0 0 0 0 0 0 0 0 0 0
                        \r) 14â€“31 \xEâ€“\x1F \16â€“\37 control codes â‰ 0 0 0 0 0 0 0 0 0 0 0 0 32 \x20 \40 space 0 â‰ 0 â‰ 0 â‰ 0 0 0 0 0 0 0 0 0 33â€“47 \x21â€“\x2F \41â€“\57 !"#$%&'()*+,-./ 0 â‰ 0 0 0 â‰ 0 â‰ 0 0 0 0 0 0 0 48â€“57 \x30â€“\x39 \60â€“\71 0123456789 0 â‰ 0 0 0 â‰ 0 0 â‰ 0 0 0 0 â‰ 0 â‰ 0 58â€“64 \x3Aâ€“\x40 \72â€“\100 :;<=>?@ 0 â‰ 0 0 0 â‰ 0 â‰ 0 0 0 0 0 0 0 65â€“70 \x41â€“\x46 \101â€“\106 ABCDEF 0 â‰ 0 0 0 â‰ 0 0 â‰ 0 â‰ 0 â‰ 0 0 0 â‰ 0 71â€“90 \x47â€“\x5A \107â€“\132 GHIJKLMNOP 0 â‰ 0 0 0 â‰ 0 0 â‰ 0 â‰ 0 â‰ 0 0 0 0
                        QRSTUVWXYZ 91â€“96 \x5Bâ€“\x60 \133â€“\140 [\]^_` 0 â‰ 0 0 0 â‰ 0 â‰ 0 0 0 0 0 0 0 97â€“102 \x61â€“\x66 \141â€“\146 abcdef 0 â‰ 0 0 0 â‰ 0 0 â‰ 0 â‰ 0 0 â‰ 0 0 â‰ 0 103â€“122 \x67â€“\x7A \147â€“\172 ghijklmnop 0 â‰ 0 0 0 â‰ 0 0 â‰ 0 â‰ 0 0 â‰ 0 0 0
                        qrstuvwxyz 123â€“126 \x7Bâ€“\x7E \172â€“\176 {|}~ 0 â‰ 0 0 0 â‰ 0 â‰ 0 0 0 0 0 0 0 127 \x7F \177 backspace â‰ 0 0 0 0 0 0 0 0 0 0 0 0
                        character (DEL)