std::ranges::common_view<V>::end
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constexpr auto end() requires (!/*simple-view*/<V>);
(1)
(since C++20)
constexpr auto end() const requires ranges::range <const V>;
(2)
(since C++20)
1) Returns an iterator representing the end of the
common_view, that is:
- ranges::begin (
base_) + ranges::distance (base_), if both ranges::random_access_range <V> and ranges::sized_range <V> are satisfied, - std::common_iterator <ranges::iterator_t <V>, ranges::sentinel_t <V>>(ranges::end (
base_)) otherwise.
2) Same as (1), but
V is const-qualified.[edit] Return value
An iterator representing the end of the underlying view.
[edit] Example
Run this code
#include <iostream> #include <numeric> #include <ranges> int main() { constexpr int n{4}; constexpr auto v1 = std::views::iota (1) | std::views::take (n) | std::views::common ; constexpr auto v2 = std::views::iota (2) | std::views::take (n) ; const int product = std::inner_product (v1.begin(), v1.end(), v2.begin(), 0); std::cout << product << '\n'; }
Output:
40
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 4012 | C++20 | non-const overload missed simple-view check | added |