std::list<T,Allocator>::prepend_range

 

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list::list list::~list list::operator= list::assign list::assign_range (C++23)   list::get_allocator Element access list::front list::back Iterators list::beginlist::cbegin (C++11) list::endlist::cend (C++11) list::rbeginlist::crbegin (C++11) list::rendlist::crend (C++11) Capacity list::size list::empty list::max_size	Modifiers list::clear list::insert list::insert_range (C++23) list::emplace (C++11) list::erase list::push_front list::emplace_front (C++11) list::prepend_range (C++23) list::pop_front list::push_back list::emplace_back (C++11) list::append_range (C++23) list::pop_back list::resize list::swap Operations list::merge list::splice list::removelist::remove_if list::reverse list::unique list::sort
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operator==operator<=> (C++20) swap(std::list) erase(std::list)erase_if(std::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 prepend_range( R&& rg );		(since C++23)

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

No iterators or references are invalidated.

Parameters

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

Return value

(none)

Complexity

Linear in size of rg.

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 <list>
#include <vector>
 
int main()
{
    auto container = std::list{0, 1, 2, 3};
    const auto rg = std::vector{-3, -2, -1};
 
#if __cpp_lib_containers_ranges
    container.prepend_range(rg);
#else
    container.insert(container.begin(), rg.cbegin(), rg.cend());
#endif
    assert(std::ranges::equal(container, std::list{-3, -2, -1, 0, 1, 2, 3}));
}

See also

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