meta::move_constructible¶

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

template <typename T>
concept move_constructible = meta::constructible_from<T, T> && meta::convertible_to<T, T>;

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

Concept emulation¶

namespace mgs {
namespace meta {

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

template <typename T>
constexpr auto is_move_constructible_v = is_move_constructible<T>::value;

template <typename T,
          typename = std::enable_if_t<is_move_constructible_v<T>>>
using move_constructible = T;

} // namespace meta
} // namespace mgs

Example¶

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

using namespace mgs::meta;

struct non_move_constructible {
  non_move_constructible(non_move_constructible&&) = delete;
}

static_assert(is_move_constructible_v<int>, "");
static_assert(is_move_constructible_v<std::unique_ptr<int>>, "");
static_assert(!is_move_constructible_v<non_move_constructible>, "");

See also¶