std::iscntrl(std::locale)
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Defined in header
<locale>
template< class CharT >
bool iscntrl( CharT ch, const locale& loc );
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.
[edit] Parameters
ch
-
character
loc
-
locale
[edit] Return value
Returns true if the character is classified as a control character, false otherwise.
[edit] 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); }
[edit] Example
Demonstrates the use of iscntrl() with different locales (OS-specific).
Run this code
#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