NAME¶

std::ranges::adjacent_view::iterator::operator[] - std::ranges::adjacent_view::iterator::operator[]

Synopsis¶

constexpr auto operator[]( difference_type n ) const (since C++23)
requires ranges::random_access_range<Base>;

Returns an element at specified relative location.

Let current_ be an underlying array of iterators.

Equivalent to:

return __tuple_transform([&](auto& i) -> decltype(auto) { return i[n]; }, current_);

Parameters¶

n - position relative to current location

Return value¶

The element at displacement n relative to the current location.

Example¶

// Run this code

#include <ranges>
#include <tuple>

int main()
{
constexpr static auto v = {0, 1, 2, 3, 4, 5};
// └──┬──┘
// └─────────────────┐
constexpr auto view = v | std::views::adjacent<3>; // │
// ┌───────────────────┬──────────────┘
// │ ┌──┴──┐
static_assert(view[2] == std::tuple{2, 3, 4});
}