Ranges (C++20)

Ranges provide composable, lazy operations over sequences. You can build pipelines with views and then consume them efficiently.

Pipeline Example

#include <iostream>
#include <ranges>
#include <vector>

int main() {
  std::vector<int> data{1, 2, 3, 4, 5, 6};

  auto result = data
    | std::views::filter([](int n) { return n % 2 == 0; })
    | std::views::transform([](int n) { return n * 10; });

  for (int n : result) {
    std::cout << n << " ";
  }
}

Common Views

• std::views::filter
• std::views::transform
• std::views::take
• std::views::drop

Benefits

• Readable data-flow style
• Lazy evaluation
• Fewer temporary containers

[!TIP] Prefer ranges for transformation pipelines; use classic loops when mutation-heavy control flow is clearer.