meta::random_access_range¶

Defined in header <mgs/meta/concepts/random_access_range.hpp>.

template <typename T>
concept random_access_range =
  meta::bidirectional_range<T> && meta::random_access_iterator<meta::iterator_t<T>>;

Pre-C++20 implementation of the std::ranges::random_access_range concept.

Concept emulation¶

namespace mgs {
namespace meta {

template <typename T>
struct is_random_access_range { /* ... */ };

template <typename T>
constexpr auto is_random_access_range_v = is_random_access_range<T>::value;

template <typename T,
          typename = std::enable_if_t<is_random_access_range_v<T>>>
using random_access_range = T;

} // namespace meta
} // namespace mgs

Example¶

#include <mgs/meta/concepts/random_access_range.hpp>

using namespace mgs::meta;

static_assert(is_random_access_range_v<std::string>, "");
static_assert(is_random_access_range_v<char [2]>, "");
static_assert(!is_random_access_range_v<std::list<char>>, "");

See also¶