std::iswgraph
From cppreference.com
| Defined in header <cwctype>
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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 (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 <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
See also
| checks if a character is classified as graphical by a locale (function template) | |
| checks if a character is a graphical character (function) | |
C documentation for iswgraph
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