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

 

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std::forward_list

Member functions
forward_list::forward_list forward_list::~forward_list forward_list::operator= forward_list::assign forward_list::assign_range (C++23)   forward_list::get_allocator Element access forward_list::front Iterators forward_list::before_beginforward_list::cbefore_begin forward_list::beginforward_list::cbegin forward_list::endforward_list::cend Capacity forward_list::empty forward_list::max_size	Modifiers forward_list::clear forward_list::emplace_front forward_list::push_front forward_list::insert_after forward_list::emplace_after forward_list::erase_after forward_list::insert_range_after (C++23) forward_list::prepend_range (C++23) forward_list::pop_front forward_list::resize forward_list::swap Operations forward_list::merge forward_list::splice_after forward_list::removeforward_list::remove_if forward_list::reverse forward_list::unique forward_list::sort
Non-member functions
operator==operator<=> (C++20) swap(std::forward_list) erase(std::forward_list)erase_if(std::forward_list) (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 assign_range( R&& rg );		(since C++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	(C++23)	Ranges-aware construction and insertion

Example

Run this code

#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};
#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_after (C++23)	inserts a range of elements after an element (public member function)
prepend_range (C++23)	adds a range of elements to the beginning (public member function)
assign	assigns values to the container (public member function)
operator=	assigns values to the container (public member function)