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

 

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std::deque

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deque::deque deque::~deque deque::operator= deque::assign deque::assign_range (C++23)   deque::get_allocator Element access deque::at deque::operator[] deque::front deque::back Iterators deque::begindeque::cbegin (C++11) deque::enddeque::cend (C++11) deque::rbegindeque::crbegin (C++11) deque::renddeque::crend (C++11)	Capacity deque::empty deque::size deque::max_size deque::shrink_to_fit (DR*) Modifiers deque::clear deque::insert deque::insert_range (C++23) deque::emplace deque::erase deque::push_front deque::emplace_front (C++11) deque::prepend_range (C++23) deque::pop_front deque::push_back deque::emplace_back (C++11) deque::append_range (C++23) deque::pop_back deque::resize deque::swap
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operator==operator<=> (C++20) swap(std::deque) erase(std::deque)erase_if(std::deque) (C++20)(C++20)	operator!=operator<operator>operator<=operator>= (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
Deduction guides(C++17)

 

template<container-compatible-range<T> R > void append_range( R&& rg );		(since C++23) (constexpr since C++26)

Inserts copies of elements from the range rg before end(), in non-reversing order.

All iterators (including the end() iterator) are invalidated. No references are invalidated.

Each iterator in rg is dereferenced exactly once.

Parameters

rg	-	a container compatible range, that is, an input_range whose elements are convertible to T
Type requirements
- If T is not EmplaceConstructible into deque from *ranges::begin(rg), the behavior is undefined.

Complexity

Linear in size of rg. The number of calls to the constructor of T is exactly equal to the std::ranges::size(rg)).

Exceptions

If an exception is thrown other than by the copy constructor, move constructor, assignment operator, or move assignment operator of T there are no effects. If an exception is thrown while inserting a single element at either end, there are no effects. Otherwise, if an exception is thrown by the move constructor of a non-CopyInsertableT, the effects are unspecified.

Notes

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

Example

Run this code

#include <cassert>#include <deque>#include <list>   int main(){auto head =std::deque{1, 2, 3, 4};constauto tail =std::list{-5, -6, -7};#ifdef __cpp_lib_containers_ranges head.append_range(tail);#else head.insert(head.end(), tail.cbegin(), tail.cend());#endifassert((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)