std::span<T,Extent>::end, std::span<T,Extent>::cend
From cppreference.com
constexpr iterator end()constnoexcept; | (1) | (since C++20) |
constexpr const_iterator cend()constnoexcept; | (2) | (since C++23) |
Returns an iterator past the last element of *this.
This returned iterator only acts as a sentinel. It is not guaranteed to be dereferenceable.
Contents |
[edit]Return value
Iterator past the last element.
[edit]Complexity
Constant.
[edit]Example
Run this code
#include <iostream>#include <span> void print(std::span<constint> array){std::cout<<"array = ";for(auto it = array.begin(); it != array.end();++it)std::cout<<*it <<' ';std::cout<<'\n';} void set_first_element(std::span<int> sp, int new_value){if(!sp.empty()){std::cout<<"old *begin = "<<*sp.begin()<<'\n';*sp.begin()= new_value;std::cout<<"new *begin = "<<*sp.begin()<<'\n';}} int main(){int array[]{1, 3, 4, 5}; print(array); set_first_element(array, 2); print(array);}
Output:
array = 1 3 4 5 old *begin = 1 new *begin = 2 array = 2 3 4 5
[edit]See also
(C++23) | returns an iterator to the beginning (public member function) |
(C++11)(C++14) | returns an iterator to the end of a container or array (function template) |
