std::default_sentinel_t, std::default_sentinel
Defined in header <iterator> |
||
---|---|---|
struct default_sentinel_t { }; |
(1) | (since C++20) |
inline constexpr default_sentinel_t default_sentinel{}; |
(2) | (since C++20) |
1)
default_sentinel_t
is an empty class type used to denote the end of a range. It can be used together with iterator types that know the bound of their range (e.g.,
std::counted_iterator
).
2)
default_sentinel
is a constant of type
default_sentinel_t
.
Example
#include <iterator> #include <algorithm> #include <list> #include <iostream> int main() { std::list<int> l{3,1,4,1,5,9,2,6}; std::ranges::copy(std::counted_iterator(std::begin(l), 4), std::default_sentinel, std::ostream_iterator<int>{std::cout, " "}); }
Output:
3 1 4 1
See also
input iterator that reads from std::basic_istream (class template) |
|
input iterator that reads from std::basic_streambuf (class template) |
|
(C++20)
|
iterator adaptor that tracks the distance to the end of the range (class template) |
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