Namespaces
Variants
Actions

std::incrementable_traits<std::common_iterator>

From cppreference.com
 
 
Iterator library
(C++11)(C++14)
(C++14)(C++14)  
(C++11)(C++14)
(C++14)(C++14)  
(C++17)(C++20)
(C++17)
(C++17)
 
 
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.

[edit] Example

Run this code
#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 >);
}

[edit] See also

computes the difference type of a weakly_incrementable type
(class template) [edit]
computes the associated types of an iterator
(alias template)[edit]
provides uniform interface to the properties of the std::common_iterator type
(class template specialization) [edit]
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/iterator/common_iterator/incrementable_traits&oldid=159276"

AltStyle によって変換されたページ (->オリジナル) /