std::forward_list<T,Allocator>::prepend_range - cppreference.com

#include<algorithm>#include<cassert>#include<forward_list>#include<vector>intmain(){autocontainer=std::forward_list{0,1,2,3};constautorg=std::vector{-3,-2,-1};#if __cpp_lib_containers_rangescontainer.prepend_range(rg);#elsecontainer.insert_after(container.before_begin(),rg.cbegin(),rg.cend());#endifassert(std::ranges::equal(container,std::forward_list{-3,-2,-1,0,1,2,3}));}