NAME¶

std::ranges::random_access_range - std::ranges::random_access_range

Synopsis¶

Defined in header <ranges>
template< class T >

concept random_access_range = (since C++20)

ranges::bidirectional_range<T> &&
std::random_access_iterator<ranges::iterator_t<T>>;

The random_access_range concept is a refinement of range for which ranges::begin
returns a model of random_access_iterator.

Example¶

// Run this code

#include <ranges>
#include <vector>
#include <array>
#include <deque>
#include <valarray>
#include <list>
#include <set>

template<typename T> concept RAR = std::ranges::random_access_range<T>;

int main()
{
int a[4];
static_assert(
RAR<std::vector<int>> and
RAR<std::vector<bool>> and
RAR<std::deque<int>> and
RAR<std::valarray<int>> and
RAR<decltype(a)> and
not RAR<std::list<int>> and
not RAR<std::set<int>> and
RAR<std::array<std::list<int>,42>>
);
}

See also¶

ranges::sized_range specifies that a range knows its size in constant time
(C++20) (concept)
ranges::contiguous_range specifies a range whose iterator type satisfies
(C++20) contiguous_iterator
(concept)