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

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< cpp‎ | ranges‎ | stride view
 
 
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(C++23)
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constexpr explicit stride_view( V base, ranges::range_difference_t<V> stride );
(since C++23)

Constructs a stride_view initializing the underlying data members:

  • move construct the underlying view base_ with std::move(base),
  • construct the stride_ with stride.

If stride < 1 the behavior is undefined.

[edit] Parameters

base - the source view
stride - the stride value

[edit] Example

A link to test: Compiler Explorer.

#include <algorithm>
#include <iostream>
#include <iterator>
#include <ranges>
#include <string_view>
 
void print(std::string_view rem, auto v, std::string_view term = "\n")
{
    std::cout << rem << ": ";
    std::ranges::copy(v, std::ostream_iterator<int>(std::cout, " "));
    std::cout << term;
};
 
int main()
{
    auto source = std::views::iota(1, 10);
    print("source", source);
 
    for (int stride_value : std::views::iota(1, 6))
    {
        auto strided_view = std::views::stride(source, stride_value);
 
        print("stride", std::views::single(stride_value), "-> ");
        print("result", strided_view);
    }
}

Output:

source: 1 2 3 4 5 6 7 8 9
stride: 1 -> result: 1 2 3 4 5 6 7 8 9
stride: 2 -> result: 1 3 5 7 9
stride: 3 -> result: 1 4 7
stride: 4 -> result: 1 5 9
stride: 5 -> result: 1 6