| 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.
Parameters
| ch | - | character |
| loc | - | locale |
Return value
Returns true if the character is classified as a control character, false otherwise.
Possible implementation
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);
} |
Example
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';
}Output:
iscntrl(CCH, C locale) returned false iscntrl(CCH, Unicode locale) returned true
See also
| checks if a character is a control character (function) | |
| checks if a wide character is a control character (function) |
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