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std::ranges::stride_view<V>::begin

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< cpp‎ | ranges‎ | stride view
 
 
Ranges library
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(C++23)
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constexpr auto begin() requires (!__simple_view<V>);
(1) (since C++23)
constexpr auto begin() const requires ranges::range<const V>;
(2) (since C++23)

Returns an iterator to the first element of the stride_view.

1) Equivalent to return iterator<false>(this, ranges::begin(base_));.
2) Equivalent to return iterator<true>(this, ranges::begin(base_));.

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).

Contents

[edit] Parameters

(none)

[edit] Return value

Iterator to the first element of the view.

[edit] Example

A link to test: Compiler Explorer.

#include <print>
#include <ranges>
 
int main()
{
    constexpr auto v = {'A', 'B', 'C'};
    const auto x = v | std::views::stride(2);
    const auto y = v | std::views::reverse | std::views::stride(2);
    const auto z = v | std::views::stride(2) | std::views::reverse;
    std::println("{} {} {}", *x.begin(), *y.begin(), *z.begin());
}

Output:

A C C

[edit] See also

(C++23)
returns an iterator or a sentinel to the end
(public member function) [edit]