std::span<T,Extent>::end,std::span<T,Extent>::cend
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std::span
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span::endspan::cend (C++23) | ||||
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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 bedereferenceable.
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 5old *begin = 1new *begin = 2array = 2 3 4 5
[edit]See also
(C++23) | returns an iterator to the beginning (public member function)[edit] |
(C++11)(C++14) | returns an iterator to the end of a container or array (function template)[edit] |
