std::incrementable_traits<std::common_iterator>
Defined in header <iterator> | ||
|---|---|---|
template< class I, class S >
struct incrementable_traits<std::common_iterator<I, S>> {
using difference_type = std::iter_difference_t<I>;
};
| (since C++20) |
Provides the uniform interface to the associated difference type of the std::common_iterator type.
Example
#include <cstddef>
#include <iterator>
#include <list>
#include <string>
#include <type_traits>
int main()
{
using CI = std::common_iterator<
std::counted_iterator<int*>,
std::default_sentinel_t>;
using CL = std::common_iterator<
std::counted_iterator<std::list<std::string>::iterator>,
std::default_sentinel_t>;
CL cl{std::default_sentinel};
static_assert(
std::same_as<std::incrementable_traits<CI>::difference_type, std::ptrdiff_t> &&
std::same_as<std::incrementable_traits<CL>::difference_type, std::ptrdiff_t> &&
std::same_as<std::incrementable_traits<decltype(cl)>::difference_type,
std::ptrdiff_t>);
}
See also
|
(C++20) | computes the difference type of a weakly_incrementable type (class template) |
|
(C++20)(C++20)(C++23)(C++20)(C++20)(C++20) | computes the associated types of an iterator (alias template) |
|
(C++20) | provides uniform interface to the properties of the std::common_iterator type (class template specialization) |
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