std::ranges::drop_while_view<V,Pred>::begin
From cppreference.com
< cpp | ranges | drop while view
| constexpr auto begin(); |
(since C++20) | |
Returns an iterator to the first element of the view.
Effectively returns ranges::find_if_not(base_, std::cref(pred())), where base_ is the underlying view.
In order to provide the amortized constant time complexity required by the range concept, this function caches the result within the drop_while_view object for use on subsequent calls.
Parameters
(none)
Return value
iterator to the first element of the view
Example
Run this code
#include <array> #include <iostream> #include <ranges> int main() { constexpr std::array data{ 0, -1, -2, 3, 1, 4, 1, 5 }; auto view = std::ranges::drop_while_view{ data, [](int x) { return x <= 0; } }; std::cout << *view.begin() << '\n'; }
Output:
3
See also
| returns an iterator or a sentinel to the end (public member function) |