class uerror final {
public:
uerror() = default;
~uerror() = default;
uerror(uerror&&) = default;
uerror& operator=(uerror&&) = default;
uerror(const uerror&) = default;
uerror& operator=(const uerror&) = default;
explicit uerror(error_code error) noexcept;
uerror& operator=(error_code error) noexcept;
bool has_error() const noexcept;
explicit operator bool() const noexcept;
error_code operator*() const noexcept;
error_code get_error() const noexcept;
void reset() noexcept;
void swap(uerror& other) noexcept;
std::size_t get_hash() const noexcept;
std::strong_ordering operator<=>(const uerror& other) const = default;
private:
error_code error_{error_code::no_error};
};class uresult final {
public:
uresult() = default;
~uresult() = default;
uresult(uresult&&) = default;
uresult& operator=(uresult&&) = default;
uresult(const uresult&) = delete;
uresult& operator=(const uresult&) = delete;
explicit(false) uresult(uerror error) noexcept;
explicit(false) uresult(uvalue value) noexcept;
uresult& operator=(uerror error) noexcept;
uresult& operator=(uvalue value) noexcept;
template <
typename T,
typename = std::enable_if_t<
!uvalue_family<std::decay_t<T>> &&
!detail::is_in_place_type_v<std::decay_t<T>> &&
std::is_constructible_v<std::decay_t<T>, T>>>
uresult(T&& val);
template <
typename T,
typename = std::enable_if_t<
!uvalue_family<std::decay_t<T>> &&
std::is_constructible_v<std::decay_t<T>, T>>>
uresult& operator=(T&& val);
template < typename T, typename... Args >
requires std::is_constructible_v<std::decay_t<T>, Args...>
explicit uresult(std::in_place_type_t<T>, Args&&... args);
template < typename T, typename U, typename... Args >
requires std::is_constructible_v<std::decay_t<T>, std::initializer_list<U>&, Args...>
explicit uresult(std::in_place_type_t<T>, std::initializer_list<U> ilist, Args&&... args);
template < typename T, typename... Args >
requires std::is_constructible_v<std::decay_t<T>, Args...>
std::decay_t<T>& emplace(Args&&... args);
template < typename T, typename U, typename... Args >
requires std::is_constructible_v<std::decay_t<T>, std::initializer_list<U>&, Args...>
std::decay_t<T>& emplace(std::initializer_list<U> ilist, Args&&... args);
bool has_error() const noexcept;
bool has_value() const noexcept;
explicit operator bool() const noexcept;
uvalue* operator->() noexcept;
const uvalue* operator->() const noexcept;
uvalue& operator*() & noexcept;
uvalue&& operator*() && noexcept;
const uvalue& operator*() const& noexcept;
const uvalue&& operator*() const&& noexcept;
uvalue& get_value() & noexcept;
uvalue&& get_value() && noexcept;
const uvalue& get_value() const& noexcept;
const uvalue&& get_value() const&& noexcept;
error_code get_error() const noexcept;
void reset() noexcept;
void swap(uresult& other) noexcept;
};class uvalue final {
public:
uvalue() = default;
~uvalue() noexcept;
uvalue(uvalue&& other) noexcept;
uvalue& operator=(uvalue&& other) noexcept;
uvalue(const uvalue& other) = delete;
uvalue& operator=(const uvalue& other) = delete;
template <
typename T,
typename = std::enable_if_t<
!uvalue_family<std::decay_t<T>> &&
!detail::is_in_place_type_v<std::decay_t<T>> &&
std::is_constructible_v<std::decay_t<T>, T>>>
uvalue(T&& val);
template <
typename T,
typename = std::enable_if_t<
!uvalue_family<std::decay_t<T>> &&
std::is_constructible_v<std::decay_t<T>, T>>>
uvalue& operator=(T&& val);
template < typename T, typename... Args >
requires std::is_constructible_v<std::decay_t<T>, Args...>
explicit uvalue(std::in_place_type_t<T>, Args&&... args);
template < typename T, typename U, typename... Args >
requires std::is_constructible_v<std::decay_t<T>, std::initializer_list<U>&, Args...>
explicit uvalue(std::in_place_type_t<T>, std::initializer_list<U> ilist, Args&&... args);
template < typename T, typename... Args >
requires std::is_constructible_v<std::decay_t<T>, Args...>
std::decay_t<T>& emplace(Args&&... args);
template < typename T, typename U, typename... Args >
requires std::is_constructible_v<std::decay_t<T>, std::initializer_list<U>&, Args...>
std::decay_t<T>& emplace(std::initializer_list<U> ilist, Args&&... args);
bool has_value() const noexcept;
explicit operator bool() const noexcept;
void reset() noexcept;
void swap(uvalue& other) noexcept;
any_type get_type() const noexcept;
void* get_data() noexcept;
const void* get_data() const noexcept;
const void* get_cdata() const noexcept;
uvalue operator*() const;
bool has_deref_op() const noexcept;
uvalue operator[](std::size_t index) const;
bool has_index_op() const noexcept;
uvalue copy() const;
bool has_copy_op() const noexcept;
uvalue unmap() const;
bool has_unmap_op() const noexcept;
std::size_t size() const;
bool has_size_op() const noexcept;
bool less(const uvalue& other) const;
bool has_less_op() const noexcept;
bool equals(const uvalue& other) const;
bool has_equals_op() const noexcept;
template < typename T >
bool is() const noexcept;
template < any_pointer_family T >
T as();
template < any_pointer_family T >
T as() const;
template < not_any_pointer_family T >
T& as() &;
template < not_any_pointer_family T >
const T& as() const&;
template < not_any_pointer_family T >
T as() &&;
template < not_any_pointer_family T >
const T&& as() const&&;
template < any_pointer_family T >
T try_as() noexcept;
template < any_pointer_family T >
T try_as() const noexcept;
template < not_any_pointer_family T >
T* try_as() & noexcept;
template < not_any_pointer_family T >
const T* try_as() const& noexcept;
template < not_any_pointer_family T >
void try_as() && = delete;
template < not_any_pointer_family T >
void try_as() const&& = delete;
};uerror make_uerror(error_code error);
template < typename T, typename... Args >
uresult make_uresult(Args&&... args);
template < typename T, typename U, typename... Args >
uresult make_uresult(std::initializer_list<U> ilist, Args&&... args);
template < typename T, typename... Args >
uvalue make_uvalue(Args&&... args);
template < typename T, typename U, typename... Args >
uvalue make_uvalue(std::initializer_list<U> ilist, Args&&... args);
template < typename To, typename From >
requires detail::ucast_as_pointers<To, From>
To ucast(From from);
template < typename To, typename From >
requires detail::ucast_as_references<To, From>
To ucast(From&& from);