# std::vector<T,Allocator>::append_range

From cppreference.com
< cpp‎ | container‎ | vector

template< container-compatible-range<T> R > constexpr 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 `vector` from *ranges::begin(rg). Also, `T` must be MoveInsertable into `vector`. 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 <vector>
    #include <list>

    int main()
    {
        auto head = std::vector{1, 2, 3, 4};
        const auto tail = std::list{-5, -6, -7};
        head.append_range(tail);
        assert(std::ranges::equal(head, std::vector{1, 2, 3, 4, -5, -6, -7}));
    }

### See also

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)

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