Defined in header <locale> | ||
|---|---|---|
template< class CharT > bool iscntrl( CharT ch, const locale& loc ); |
Checks if the given character is classified as a control character by the given locale's std::ctype facet.
| ch | - | character |
| loc | - | locale |
Returns true if the character is classified as a control character, false otherwise.
template< class CharT >
bool iscntrl( CharT ch, const std::locale& loc ) {
return std::use_facet<std::ctype<CharT>>(loc).is(std::ctype_base::cntrl, ch);
} |
Demonstrates the use of iscntrl() with different locales (OS-specific).
#include <iostream>
#include <locale>
int main()
{
const wchar_t CCH = L'\u0094'; // Destructive Backspace in Unicode
std::locale loc1("C");
std::cout << "iscntrl(CCH, C locale) returned "
<< std::boolalpha << std::iscntrl(CCH, loc1) << '\n';
std::locale loc2("en_US.UTF8");
std::cout << "iscntrl(CCH, Unicode locale) returned "
<< std::boolalpha << std::iscntrl(CCH, loc2) << '\n';
}Possible output:
iscntrl(CCH, C locale) returned false iscntrl(CCH, Unicode locale) returned true
| checks if a character is a control character (function) |
|
| checks if a wide character is a control character (function) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/locale/iscntrl