The <ranges> header provides C++ ranges, views, and range adaptors for processing containers without manually tracking iterator endpoints. A view can filter or transform elements while leaving the underlying container untouched. section 2.3.4
Use std::ranges::views with the pipe operator to make a sequence of operations readable. For example, drop_while skips initial values below 3, while filter can expose negative values for a simple validation check. section 2.3.4
Filtering a row
auto negative = [](int x) { return x < 0; }; auto negatives = row | std::views::filter(negative); assert(negatives.empty()); This checks that a generated row contains no negative numbers without maintaining iterator positions. section 2.3.4
for (int n : v | std::views::drop_while([](int i) { return i < 3; })) {
std::cout << n << ' ';
}
Apply drop_while with a pipe to express a readable range-processing step. section 2.3.4
