NAME¶

std::ctype::scan_not,std::ctype::do_scan_not - std::ctype::scan_not,std::ctype::do_scan_not

Synopsis¶

Defined in header <locale>
public: (1)
const CharT* scan_not( mask m, const CharT* beg, const CharT* end ) const;
protected:
virtual const CharT* do_scan_not( mask m, const CharT* beg, const CharT* end ) (2)
const;

1) Public member function, calls the protected virtual member function do_scan_not
of the most derived class.
2) Locates the first character in the character array [beg, end) that does not
satisfy the classification mask m, that is, the first character c such that is(m, c)
would return false.

Parameters¶

m - mask to search for
beg - pointer to the first character in an array of characters to search
end - one past the end pointer for the array of characters to search

Return value¶

Pointer to the first character in [beg, end) that doesn't satisfy the mask, or end
if no such character was found.

Example¶

// Run this code

#include <clocale>
#include <iostream>
#include <iterator>
#include <locale>

int main()
{
std::setlocale(LC_ALL, "en_US.utf8");
std::wcout.imbue(std::locale("en_US.utf8"));
auto& f = std::use_facet<std::ctype<wchar_t>>(std::wcout.getloc());

// skip leading whitespace
wchar_t s1[] = L" \t\t\n Кошка";
const wchar_t* p1 = f.scan_not(std::ctype_base::space, std::begin(s1), std::end(s1));
std::wcout << '\'' << p1 << "'\n";

// skip leading digits
wchar_t s2[] = L"123456789ネプネプ";
const wchar_t* p2 = f.scan_not(std::ctype_base::digit, std::begin(s2), std::end(s2));
std::wcout << '\'' << p2 << "'\n";
}

Output:¶

'Кошка'
'ネプネプ'

See also¶

locates the first character in a sequence that fails given
scan_not classification, using the classification table
(public member function of std::ctype<char>)
do_scan_is locates the first character in a sequence that conforms to given
[virtual] classification
(virtual protected member function)