std::ranges...:stride_view(3)

💅 std::ranges::stride_view::stride_view

okay so bestie, this is the std::ranges::stride_view::stride_view page from the C++ Standard Library manual (we're in cppreference.com territory, the girlies who actually read it know 😌). It's literally just the constructor. The whole page. One constructor. And honestly? She ate. Let's get into it 🎀

✨ NAME ✨

std::ranges::stride_view::stride_view — yes the name is the name twice, that's not a typo, that's just how constructors roll 💅

🌸 Synopsis 🌸

constexpr explicit stride_view( V base, ranges::range_difference_t<V>
stride );

(since C++23) 🦋

So what does she do? She constructs a stride_view and initializes the underlying data members, no cap:

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

⚠️ Heads up bestie: if stride < 1 the behavior is undefined. Like, not "it'll be fiiiine" undefined — actually undefined. Do not test her. 🙈

🧚 Parameters 🧚

• base — the source view 💖
• stride — the stride value ✨

🔥 Example 🔥

// Run this code

#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

like look at that output 😭 every stride just picks her little faves out of the source and dips. iconic behavior honestly. 👑

and that's the whole page, bestie — short and sweet, just like she is 🫶 this one came from cppreference.com, dated 2024.06.10, and that's the vibe check for std::ranges::stride_view(3). mwah 💋✨