FreeBSD Manual Pages
std::forwar...place_after(3) C++ Standard Libary std::forwar...place_after(3) NAME std::forward_list::emplace_after - std::forward_list::emplace_after Synopsis template< class... Args > (since C++11) iterator emplace_after( const_iterator pos, Args&&... args ); Inserts a new element into a position after the specified position in the container. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element is called with exactly the same argu- ments, as supplied to the function. No iterators or references are invalidated. Parameters pos - iterator after which the new element will be constructed args - arguments to forward to the constructor of the element Return value iterator to the new element. Complexity Constant. Exceptions If an exception is thrown (e.g. by the constructor), the container is left unmodified, as if this function was never called (strong exception guarantee). Example The example demonstrates a canonical filling of a single-linked list in natural (as opposed to reverse) order. // Run this code #include <forward_list> #include <iostream> #include <string> struct Sum { std::string remark; int sum; Sum(std::string remark, int sum) : remark{std::move(remark)}, sum{sum} {} void print() const { std::cout << remark << " = " << sum << '\n'; } }; int main() { std::forward_list<Sum> list; auto iter = list.before_begin(); std::string str{"1"}; for (int i{1}, sum{1}; i != 10; sum += i) { iter = list.emplace_after(iter, str, sum); ++i; str += " + " + std::to_string(i); } for (const Sum& s : list) s.print(); } Output: 1 = 1 1 + 2 = 3 1 + 2 + 3 = 6 1 + 2 + 3 + 4 = 10 1 + 2 + 3 + 4 + 5 = 15 1 + 2 + 3 + 4 + 5 + 6 = 21 1 + 2 + 3 + 4 + 5 + 6 + 7 = 28 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 = 36 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45 See also insert_after inserts elements after an element (C++11) (public member function) http://cppreference.com 2022.07.31 std::forwar...place_after(3)
NAME | Synopsis | Parameters | Return value | Complexity | Exceptions | Example | Output: | See also
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::forward_list::emplace_after&sektion=3&manpath=FreeBSD+Ports+15.0>