Trait windows::Interface

pub unsafe trait Interface: Sized + Abi {
    type Vtable;

    const IID: Guid;
    unsafe fn vtable(&self) -> &Self::Vtable { ... }
    unsafe fn assume_vtable<T: Interface>(&self) -> &T::Vtable { ... }
    fn cast<T: Interface>(&self) -> Result<T> { ... }
    fn downgrade(&self) -> Result<Weak<Self>> { ... }
}

Provides low-level access to a COM interface.

This trait is automatically used by the generated bindings and should not be used directly.

Associated Types

type Vtable

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Associated Constants

const IID: Guid

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Provided methods

unsafe fn vtable(&self) -> &Self::Vtable

Returns the vtable for the current interface.

unsafe fn assume_vtable<T: Interface>(&self) -> &T::Vtable

Returns the vtable for an assumed interface. The name comes from Box’s assume_init method as it assumes the vtable is implemented by the current interface’s vtable (e.g. a parent interface).

fn cast<T: Interface>(&self) -> Result<T>

Attempts to cast the current interface to another interface using QueryInterface. The name cast is preferred to query because there is a WinRT method named query but not one named cast.

fn downgrade(&self) -> Result<Weak<Self>>

Attempts to create a Weak reference to this object.

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Implementors

impl Interface for IInspectable

type Vtable = IInspectable_abi

const IID: Guid

impl Interface for IUnknown

type Vtable = IUnknown_abi

const IID: Guid

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