std::ranges::cend
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Defined in header <ranges> | ||
Defined in header <iterator> | ||
inlinenamespace/* unspecified */{ inlineconstexpr/* unspecified */ cend=/* unspecified */; | (since C++20) (customization point object) | |
Call signature | ||
template<class T> requires/* see below */ | (since C++20) | |
Returns a sentinel for the constant iterator(since C++23) indicating the end of aconst-qualified(until C++23) range.
Let
A call to | (until C++23) |
If the argument is an lvalue orranges::enable_borrowed_range<std::remove_cv_t<T>> istrue, then a call to
In all other cases, a call to | (since C++23) |
Ifranges::cend(e) is valid for an expressione, wheredecltype((e)) isT, thenCT modelsstd::ranges::range, and(until C++23)std::sentinel_for<S, I> istrue in all cases, whereS isdecltype(ranges::cend(e)), andI isdecltype(ranges::cbegin(e)).Additionally,S modelsconstant-iterator if it modelsinput_iterator.(since C++23)
Customization point objects
The nameranges::cend denotes acustomization point object, which is a constfunction object of aliteralsemiregular class type. SeeCustomizationPointObject for details.
[edit]Example
#include <algorithm>#include <cassert>#include <ranges>#include <vector> int main(){std::vector vec{3,1,4};int arr[]{5,10,15}; assert(std::ranges::find(vec,5)== std::ranges::cend(vec));assert(std::ranges::find(arr,5)!= std::ranges::cend(arr));}
[edit]See also
(C++20) | returns a sentinel indicating the end of a range (customization point object)[edit] |
(C++11)(C++14) | returns an iterator to the end of a container or array (function template)[edit] |
