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Difference between revisions of "cpp/string/wide/iswgraph"

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< cpp‎ | string‎ | wide
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{{cpp/title|iswgraph}}
 
{{cpp/title|iswgraph}}
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{{cpp/string/wide/sidebar}}
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{{cpp/string/wide/navbar}}
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{{ddcl | header=cwctype |
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{{ddcl|header=cwctype|
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int iswgraph( wint_t ch );
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int iswgraph( std::wint_t ch );
 
}}
 
}}
  
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Checks if the given wide character has a graphical representation, i. e. it is either a number ({{tt|0123456789}}), an uppercase letter ({{tt|ABCDEFGHIJKLMNOPQRSTUVWXYZ}}), a lowercase letter ({{tt|abcdefghijklmnopqrstuvwxyz}}), a punctuation character({{tt|!"#$%&'()*+,-./:;<{{=}}>?@[\]^_`{<nowiki></nowiki>{{!}}<nowiki></nowiki>}~}}) or any graphical character specific to the current locale.
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Checks if the given wide character has a graphical representation, i.e. it is either a number ({{tt|0123456789}}), an uppercase letter ({{tt|ABCDEFGHIJKLMNOPQRSTUVWXYZ}}), a lowercase letter ({{tt|abcdefghijklmnopqrstuvwxyz}}), a punctuation character ({{tt|<nowiki>!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~</nowiki>}}) or any graphical character specific to the current C locale.
  
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<!-- ======== -->
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{{cpp/string/wide/wint_t args}}
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{{params}}
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{{param list begin}}
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{{param list item | ch | wide character}}
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{{param list end}}
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<!-- ======== -->
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===Parameters===
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{{returns}}
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{{par begin}}
 +
{{par|ch|wide character}}
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{{par end}}
  
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non-zero value ({{cpp|true}}) if the wide character has a graphical representation character, {{tt|0}} ({{cpp|false}}) otherwise.
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===Return value===
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Non-zero value if the wide character has a graphical representation character, zero otherwise.
  
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<!-- ======== -->
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===Notes===
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{{see also}}
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[https://www.open-std.org/JTC1/SC35/WG5/docs/30112d10.pdf ISO 30112] specifies which Unicode characters are include in POSIX graph category.
 +
 
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===Example===
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{{example
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|code=
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#include <clocale>
 +
#include <cwctype>
 +
#include <iostream>
 +
 
 +
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<bool>(std::iswgraph(c)) << '\n';
 +
 
 +
    std::setlocale(LC_ALL, "en_US.utf8");
 +
    std::cout << "in Unicode locale, iswgraph("
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              << static_cast<std::wint_t>(c) << ") = "
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              << static_cast<bool>(std::iswgraph(c)) << '\n';
 +
}
 +
|output=
 +
in the default locale, iswgraph(0x2602) = false
 +
in Unicode locale, iswgraph(0x2602) = true
 +
}}
 +
 
 +
===See also===
 +
{{dsc begin}}
 +
{{dsc inc|cpp/locale/dsc isgraph}}
 +
{{dsc inc|cpp/string/byte/dsc isgraph}}
 +
{{dsc see c|c/string/wide/iswgraph}}
 +
{{dsc end}}
 
{{cpp/string/character classes}}
 
{{cpp/string/character classes}}
 +
 +
{{langlinks|de|es|fr|it|ja|pt|ru|zh}}

Latest revision as of 09:22, 15 September 2023

 
C++
 
Strings library
 
Null-terminated wide strings
 
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.

Contents

[edit] Parameters

ch - wide character

[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

Run this code
#include <clocale>
#include <cwctype>
#include <iostream>
 
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<bool>(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<bool>(std::iswgraph(c)) << '\n';
}

Output: 

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

[edit] See also

 checks if a character is classified as graphical by a locale
(function template) [edit]
checks if a character is a graphical character
(function) [edit]
C documentation for iswgraph
ASCII values characters

iscntrl
iswcntrl

isprint
iswprint

isspace
iswspace

isblank
iswblank

isgraph
iswgraph

ispunct
iswpunct

isalnum
iswalnum

isalpha
iswalpha

isupper
iswupper

islower
iswlower

isdigit
iswdigit

isxdigit
iswxdigit

decimal hexadecimal octal
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–\106 ABCDEF 0 ≠0 0 0 ≠0 0 ≠0 ≠0 ≠0 0 0 ≠0
71–90 \x47–\x5A \107–\132 GHIJKLMNOP
QRSTUVWXYZ 		0 ≠0 0 0 ≠0 0 ≠0 ≠0 ≠0 0 0 0
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
qrstuvwxyz 		0 ≠0 0 0 ≠0 0 ≠0 ≠0 0 ≠0 0 0
123–126 \x7B–\x7E \172–\176 {|}~ 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
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