std::ranges::take_view<V>::begin

constexpr auto begin() requires (!__SimpleView<V>);

constexpr auto begin() const requires ranges::range<const V>;

Returns an iterator to the first element of the take_view.

Overload (1) does not participate in overload resolution if V is a simple view (that is, if V and const V are views with the same iterator and sentinel types).

Parameters

(none).

Return value

The result depends on the concepts satisfied by possible const-qualified underlying view type Base_, which is V (for overload (1)) or const V (for overload (2)).

Let base_ be the underlying view, count_ be the number passed to the constructor (​0​ if default initialized).

Example

#include <ranges>
#include <iostream>
#include <string_view>
using namespace std::literals;
 
int main()
{
    static constexpr auto sv = {"∀x"sv, "∃y"sv, "ε"sv, "δ"sv};
 
    std::cout << *std::ranges::take_view(sv, 8).begin() << '\n';
}

∀x

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

See also