std::ranges::drop_while_view<V,Pred>:: begin

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. The behavior is undefined if * this does not store a predicate.

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

#include <cassert>
#include <ranges>
 
int main()
{
    static constexpr auto data = {0, -1, -2, 3, 1, 4, 1, 5};
    auto view = std::ranges::drop_while_view{data, [](int x){ return x <= 0; }};
    assert(view.begin()[0] == 3);
}

See also