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Diffstat (limited to 'deps/include/entt/core/compressed_pair.hpp')
| -rw-r--r-- | deps/include/entt/core/compressed_pair.hpp | 272 |
1 files changed, 0 insertions, 272 deletions
diff --git a/deps/include/entt/core/compressed_pair.hpp b/deps/include/entt/core/compressed_pair.hpp deleted file mode 100644 index a10589f..0000000 --- a/deps/include/entt/core/compressed_pair.hpp +++ /dev/null @@ -1,272 +0,0 @@ -#ifndef ENTT_CORE_COMPRESSED_PAIR_HPP
-#define ENTT_CORE_COMPRESSED_PAIR_HPP
-
-#include <cstddef>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include "fwd.hpp"
-#include "type_traits.hpp"
-
-namespace entt {
-
-/*! @cond TURN_OFF_DOXYGEN */
-namespace internal {
-
-template<typename Type, std::size_t, typename = void>
-struct compressed_pair_element {
- using reference = Type &;
- using const_reference = const Type &;
-
- template<typename Dummy = Type, typename = std::enable_if_t<std::is_default_constructible_v<Dummy>>>
- // NOLINTNEXTLINE(modernize-use-equals-default)
- constexpr compressed_pair_element() noexcept(std::is_nothrow_default_constructible_v<Type>) {}
-
- template<typename Arg, typename = std::enable_if_t<!std::is_same_v<std::remove_cv_t<std::remove_reference_t<Arg>>, compressed_pair_element>>>
- constexpr compressed_pair_element(Arg &&arg) noexcept(std::is_nothrow_constructible_v<Type, Arg>)
- : value{std::forward<Arg>(arg)} {}
-
- template<typename... Args, std::size_t... Index>
- constexpr compressed_pair_element(std::tuple<Args...> args, std::index_sequence<Index...>) noexcept(std::is_nothrow_constructible_v<Type, Args...>)
- : value{std::forward<Args>(std::get<Index>(args))...} {}
-
- [[nodiscard]] constexpr reference get() noexcept {
- return value;
- }
-
- [[nodiscard]] constexpr const_reference get() const noexcept {
- return value;
- }
-
-private:
- Type value{};
-};
-
-template<typename Type, std::size_t Tag>
-struct compressed_pair_element<Type, Tag, std::enable_if_t<is_ebco_eligible_v<Type>>>: Type {
- using reference = Type &;
- using const_reference = const Type &;
- using base_type = Type;
-
- template<typename Dummy = Type, typename = std::enable_if_t<std::is_default_constructible_v<Dummy>>>
- constexpr compressed_pair_element() noexcept(std::is_nothrow_default_constructible_v<base_type>)
- : base_type{} {}
-
- template<typename Arg, typename = std::enable_if_t<!std::is_same_v<std::remove_cv_t<std::remove_reference_t<Arg>>, compressed_pair_element>>>
- constexpr compressed_pair_element(Arg &&arg) noexcept(std::is_nothrow_constructible_v<base_type, Arg>)
- : base_type{std::forward<Arg>(arg)} {}
-
- template<typename... Args, std::size_t... Index>
- constexpr compressed_pair_element(std::tuple<Args...> args, std::index_sequence<Index...>) noexcept(std::is_nothrow_constructible_v<base_type, Args...>)
- : base_type{std::forward<Args>(std::get<Index>(args))...} {}
-
- [[nodiscard]] constexpr reference get() noexcept {
- return *this;
- }
-
- [[nodiscard]] constexpr const_reference get() const noexcept {
- return *this;
- }
-};
-
-} // namespace internal
-/*! @endcond */
-
-/**
- * @brief A compressed pair.
- *
- * A pair that exploits the _Empty Base Class Optimization_ (or _EBCO_) to
- * reduce its final size to a minimum.
- *
- * @tparam First The type of the first element that the pair stores.
- * @tparam Second The type of the second element that the pair stores.
- */
-template<typename First, typename Second>
-class compressed_pair final
- : internal::compressed_pair_element<First, 0u>,
- internal::compressed_pair_element<Second, 1u> {
- using first_base = internal::compressed_pair_element<First, 0u>;
- using second_base = internal::compressed_pair_element<Second, 1u>;
-
-public:
- /*! @brief The type of the first element that the pair stores. */
- using first_type = First;
- /*! @brief The type of the second element that the pair stores. */
- using second_type = Second;
-
- /**
- * @brief Default constructor, conditionally enabled.
- *
- * This constructor is only available when the types that the pair stores
- * are both at least default constructible.
- *
- * @tparam Dummy Dummy template parameter used for internal purposes.
- */
- template<bool Dummy = true, typename = std::enable_if_t<Dummy && std::is_default_constructible_v<first_type> && std::is_default_constructible_v<second_type>>>
- constexpr compressed_pair() noexcept(std::is_nothrow_default_constructible_v<first_base> && std::is_nothrow_default_constructible_v<second_base>)
- : first_base{},
- second_base{} {}
-
- /**
- * @brief Copy constructor.
- * @param other The instance to copy from.
- */
- constexpr compressed_pair(const compressed_pair &other) noexcept(std::is_nothrow_copy_constructible_v<first_base> && std::is_nothrow_copy_constructible_v<second_base>) = default;
-
- /**
- * @brief Move constructor.
- * @param other The instance to move from.
- */
- constexpr compressed_pair(compressed_pair &&other) noexcept(std::is_nothrow_move_constructible_v<first_base> && std::is_nothrow_move_constructible_v<second_base>) = default;
-
- /**
- * @brief Constructs a pair from its values.
- * @tparam Arg Type of value to use to initialize the first element.
- * @tparam Other Type of value to use to initialize the second element.
- * @param arg Value to use to initialize the first element.
- * @param other Value to use to initialize the second element.
- */
- template<typename Arg, typename Other>
- constexpr compressed_pair(Arg &&arg, Other &&other) noexcept(std::is_nothrow_constructible_v<first_base, Arg> && std::is_nothrow_constructible_v<second_base, Other>)
- : first_base{std::forward<Arg>(arg)},
- second_base{std::forward<Other>(other)} {}
-
- /**
- * @brief Constructs a pair by forwarding the arguments to its parts.
- * @tparam Args Types of arguments to use to initialize the first element.
- * @tparam Other Types of arguments to use to initialize the second element.
- * @param args Arguments to use to initialize the first element.
- * @param other Arguments to use to initialize the second element.
- */
- template<typename... Args, typename... Other>
- constexpr compressed_pair(std::piecewise_construct_t, std::tuple<Args...> args, std::tuple<Other...> other) noexcept(std::is_nothrow_constructible_v<first_base, Args...> && std::is_nothrow_constructible_v<second_base, Other...>)
- : first_base{std::move(args), std::index_sequence_for<Args...>{}},
- second_base{std::move(other), std::index_sequence_for<Other...>{}} {}
-
- /*! @brief Default destructor. */
- ~compressed_pair() noexcept(std::is_nothrow_destructible_v<First> && std::is_nothrow_destructible_v<Second>) = default;
-
- /**
- * @brief Copy assignment operator.
- * @param other The instance to copy from.
- * @return This compressed pair object.
- */
- constexpr compressed_pair &operator=(const compressed_pair &other) noexcept(std::is_nothrow_copy_assignable_v<first_base> && std::is_nothrow_copy_assignable_v<second_base>) = default;
-
- /**
- * @brief Move assignment operator.
- * @param other The instance to move from.
- * @return This compressed pair object.
- */
- constexpr compressed_pair &operator=(compressed_pair &&other) noexcept(std::is_nothrow_move_assignable_v<first_base> && std::is_nothrow_move_assignable_v<second_base>) = default;
-
- /**
- * @brief Returns the first element that a pair stores.
- * @return The first element that a pair stores.
- */
- [[nodiscard]] constexpr first_type &first() noexcept {
- return static_cast<first_base &>(*this).get();
- }
-
- /*! @copydoc first */
- [[nodiscard]] constexpr const first_type &first() const noexcept {
- return static_cast<const first_base &>(*this).get();
- }
-
- /**
- * @brief Returns the second element that a pair stores.
- * @return The second element that a pair stores.
- */
- [[nodiscard]] constexpr second_type &second() noexcept {
- return static_cast<second_base &>(*this).get();
- }
-
- /*! @copydoc second */
- [[nodiscard]] constexpr const second_type &second() const noexcept {
- return static_cast<const second_base &>(*this).get();
- }
-
- /**
- * @brief Swaps two compressed pair objects.
- * @param other The compressed pair to swap with.
- */
- constexpr void swap(compressed_pair &other) noexcept(std::is_nothrow_swappable_v<first_type> && std::is_nothrow_swappable_v<second_type>) {
- using std::swap;
- swap(first(), other.first());
- swap(second(), other.second());
- }
-
- /**
- * @brief Extracts an element from the compressed pair.
- * @tparam Index An integer value that is either 0 or 1.
- * @return Returns a reference to the first element if `Index` is 0 and a
- * reference to the second element if `Index` is 1.
- */
- template<std::size_t Index>
- [[nodiscard]] constexpr decltype(auto) get() noexcept {
- if constexpr(Index == 0u) {
- return first();
- } else {
- static_assert(Index == 1u, "Index out of bounds");
- return second();
- }
- }
-
- /*! @copydoc get */
- template<std::size_t Index>
- [[nodiscard]] constexpr decltype(auto) get() const noexcept {
- if constexpr(Index == 0u) {
- return first();
- } else {
- static_assert(Index == 1u, "Index out of bounds");
- return second();
- }
- }
-};
-
-/**
- * @brief Deduction guide.
- * @tparam Type Type of value to use to initialize the first element.
- * @tparam Other Type of value to use to initialize the second element.
- */
-template<typename Type, typename Other>
-compressed_pair(Type &&, Other &&) -> compressed_pair<std::decay_t<Type>, std::decay_t<Other>>;
-
-/**
- * @brief Swaps two compressed pair objects.
- * @tparam First The type of the first element that the pairs store.
- * @tparam Second The type of the second element that the pairs store.
- * @param lhs A valid compressed pair object.
- * @param rhs A valid compressed pair object.
- */
-template<typename First, typename Second>
-inline constexpr void swap(compressed_pair<First, Second> &lhs, compressed_pair<First, Second> &rhs) {
- lhs.swap(rhs);
-}
-
-} // namespace entt
-
-namespace std {
-
-/**
- * @brief `std::tuple_size` specialization for `compressed_pair`s.
- * @tparam First The type of the first element that the pair stores.
- * @tparam Second The type of the second element that the pair stores.
- */
-template<typename First, typename Second>
-struct tuple_size<entt::compressed_pair<First, Second>>: integral_constant<size_t, 2u> {};
-
-/**
- * @brief `std::tuple_element` specialization for `compressed_pair`s.
- * @tparam Index The index of the type to return.
- * @tparam First The type of the first element that the pair stores.
- * @tparam Second The type of the second element that the pair stores.
- */
-template<size_t Index, typename First, typename Second>
-struct tuple_element<Index, entt::compressed_pair<First, Second>>: conditional<Index == 0u, First, Second> {
- static_assert(Index < 2u, "Index out of bounds");
-};
-
-} // namespace std
-
-#endif
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