NAME

std::ranges::drop_while_view::begin - std::ranges::drop_while_view::begin

Synopsis

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. 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

// 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

end returns an iterator or a sentinel to the end
(C++20) (public member function)