Class AnyView

• Defined in File any.h

Class Documentation

class AnyView

AnyView allows us to take un-managed reference view of any value.

Public Functions

inline void reset()

Reset any view to None.

inline void swap(AnyView &other) noexcept

Swap this AnyView with another AnyView.

Parameters:

other – The other AnyView

inline int32_t type_index() const noexcept

Returns:

the internal type index

inline AnyView()

Default constructor.

~AnyView() = default

AnyView(const AnyView&) = default

Copy constructor.

inline AnyView(AnyView &&other)

Move constructor.

template<typename T, typename = std::enable_if_t<TypeTraits<T>::convert_enabled>>
inline AnyView(const T &other)

Constructor from a general type.

Template Parameters:

T – The type to convert from.

Parameters:

other – The value to convert from.

template<typename T, typename = std::enable_if_t<TypeTraits<T>::convert_enabled>>
inline std::optional<T> as() const

Try to see if we can reinterpret the AnyView to as T object.

Note

This function won’t try run type conversion (use try_cast for that purpose).

Template Parameters:

T – The type to cast to.

Returns:

The casted value, or std::nullopt if the cast is not possible.

template<typename T, typename = std::enable_if_t<std::is_base_of_v<Object, T>>>
inline const T *as() const

Shortcut of as Object to cast to a const pointer when T is an Object.

Template Parameters:

T – The object type.

Returns:

The requested pointer, returns nullptr if type mismatches.

template<typename T, typename = std::enable_if_t<TypeTraits<T>::convert_enabled>>
inline T cast() const

Cast to a type T.

Template Parameters:

T – The type to cast to.

Returns:

The casted value, or throws an exception if the cast is not possible.

template<typename T, typename = std::enable_if_t<TypeTraits<T>::convert_enabled>>
inline std::optional<T> try_cast() const

Try to cast to a type T, return std::nullopt if the cast is not possible.

Template Parameters:

T – The type to cast to.

Returns:

The casted value, or std::nullopt if the cast is not possible.

inline std::string GetTypeKey() const

Get the type key of the Any.

Returns:

The type key of the Any

inline TVMFFIAny CopyToTVMFFIAny() const

Note

This function is used only for testing purposes.

Returns:

The underlying supporting data of any view

Public Static Functions

static inline AnyView CopyFromTVMFFIAny(TVMFFIAny data)

Parameters:

data – the underlying ffi data.

Returns:

Create an AnyView from TVMFFIAny

Protected Attributes

TVMFFIAny data_

The underlying backing data of the any object.

Friends

friend class Any