std::list<T,Allocator>::prepend_range
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list::prepend_range
(C++23)
(C++11)
(C++23)
(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
template< container-compatible-range <T> R >
void prepend_range( R&& rg );
(since C++23) void prepend_range( R&& rg );
(constexpr since C++26)
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.
Contents
[edit] Parameters
Type requirements
[edit] Complexity
Linear in size of rg.
[edit] Notes
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_containers_ranges |
202202L |
(C++23) | Ranges-aware construction and insertion |
[edit] 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})); }