template< container-compatible-range<T> R > void assign_range( R&& rg ); | (since C++23) |
Replaces elements in the container with a copy of each element in rg. Invalidate all references, pointers, and iterators referring to the elements of the container. Each iterator in the range rg is dereferenced exactly once.
The behavior is undefined if rg overlaps with the container.
| rg | - | an input_range with reference type convertible to the element type of the container |
| Type requirements | ||
-std::assignable_from<T&, ranges::range_reference_t<R>> must be modeled. Otherwise, the program is ill-formed. |
||
-T must be EmplaceConstructible into the container from *ranges::begin(rg). Otherwise, the behavior is undefined. |
||
(none).
| Feature-test macro | Value | Std | Comment |
|---|---|---|---|
__cpp_lib_containers_ranges | 202202L | (C++23) | Ranges-aware construction and insertion |
#include <algorithm>
#include <cassert>
#include <forward_list>
#include <list>
int main()
{
const auto source = std::list{2, 7, 1};
auto destination = std::forward_list{3, 1, 4};
destination.assign_range(source);
assert(std::ranges::equal(source, destination));
}|
(C++23) | inserts a range of elements after an element (public member function) |
|
(C++23) | adds a range of elements to the beginning (public member function) |
|
(C++11) | assigns values to the container (public member function) |
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