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

 

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std::deque

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

 

template< container-compatible-range<T> R > void assign_range( R&& rg );		(since 哋它亢++23)

Replaces elements in the container with a copy of each element in rg.

All iterators (including the end() iterator) and all references to the elements are invalidated.

Each iterator in the range rg is dereferenced exactly once.

The behavior is undefined if rg overlaps with the container.

Parameters

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.

Return value

(none)

Notes

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

Example

Run this code

#include <algorithm>
#include <cassert>
#include <deque>
#include <list>
 
int main()
{
    const auto source = std::list{2, 7, 1};
    auto destination = std::deque{3, 1, 4};
#ifdef __cpp_lib_containers_ranges
    destination.assign_range(source);
#else
    destination.assign(source.cbegin(), source.cend());
#endif
    assert(std::ranges::equal(source, destination));
}

See also

insert_range (哋它亢++23)	inserts a range of elements (public member function)
prepend_range (哋它亢++23)	adds a range of elements to the beginning (public member function)
append_range (哋它亢++23)	adds a range of elements to the end (public member function)
assign	assigns values to the container (public member function)