std::deque<T,Allocator>::append_range

 

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template< container-compatible-range<T> R > void append_range( R&& rg );		(since C++23)

Inserts copies of elements in rg before end() in non-reversing order. Each iterator in the range rg is dereferenced exactly once.

Parameters

rg	-	a container compatible range, that is, an input_range whose elements are convertible to T.
Type requirements
- T must be EmplaceConstructible into deque from *ranges::begin(rg). Otherwise, the behavior is undefined.

Return value

(none)

Complexity

Linear in size of rg.

Notes

Feature-test macro	Value	Std	Comment
__cpp_lib_containers_ranges	202202L	(C++23)	Ranges-aware construction and insertion

Example

Run this code

#include <algorithm>
#include <cassert>
#include <deque>
#include <list>
 
int main()
{
    auto head = std::deque{1, 2, 3, 4};
    const auto tail = std::list{-5, -6, -7};
    head.append_range(tail);
    assert(std::ranges::equal(head, std::deque{1, 2, 3, 4, -5, -6, -7}));
}

See also

prepend_range (C++23)	adds a range of elements to the beginning (public member function)
insert_range (C++23)	inserts a range of elements (public member function)
push_back	adds an element to the end (public member function)
emplace_back (C++11)	constructs an element in-place at the end (public member function)