std::iswgraph (3) - Linux Man Pages

std::iswgraph: std::iswgraph

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 ('☂')


      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


                     checks if a character is classfied as graphical by a locale
isgraph(std::locale) (function template)
                     checks if a character is a graphical character
isgraph (function)


ASCII values iscntrl isprint isspace isblank isgraph ispunct isalnum isalpha isupper islower isdigit isxdigit
decimal hexadecimal octal characters iswcntrl iswprint iswspace iswblank iswgraph iswpunct iswalnum iswalpha iswupper iswlower iswdigit iswxdigit


0–8 \x0–\x8 \0–\10 control codes (NUL, etc.) ≠0 0 0 0 0 0 0 0 0 0 0 0
9 \x9 \11 tab (\t) ≠0 0 ≠0 ≠0 0 0 0 0 0 0 0 0
10–13 \xA–\xD \12–\15 whitespaces (\n, \v, \f, \r) ≠0 0 ≠0 0 0 0 0 0 0 0 0 0
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–\10ABCDEF 0 ≠0 0 0 ≠0 0 ≠0 ≠0 ≠0 0 0 ≠0
71–90 \x47–\x5A \107–\13GHIJKLMNOP 0 ≠0 0 0 ≠0 0 ≠0 ≠0 ≠0 0 0 0
                              QRSTUVWXYZ
91–96 \x5B–\x60 \133–\14[\]^_` 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
97–102\x61–\x66 \141–\14abcdef 0 ≠0 0 0 ≠0 0 ≠0 ≠0 0 ≠0 0 ≠0
103–12\x67–\x7A \147–\17ghijklmnop 0 ≠0 0 0 ≠0 0 ≠0 ≠0 0 ≠0 0 0
                              qrstuvwxyz
123–12\x7B–\x7E \172–\17{|}~ 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
127 \x7F \177 backspace character (DEL) ≠0 0 0 0 0 0 0 0 0 0 0 0