Enum Cast

pub enum Cast<'a, T>
where
    T: RefFromWasmAbi<Abi = u32> + LongRefFromWasmAbi<Abi = u32> + 'a,
{
    Ref {
        anchor: <T as RefFromWasmAbi>::Anchor,
    },
    OwnedRef {
        js_value: Option<JsValue>,
        anchor: Option<<T as RefFromWasmAbi>::Anchor>,
    },
    LongRef {
        anchor: <T as LongRefFromWasmAbi>::Anchor,
    },
    Value {
        value: Option<T>,
    },
    _Unreachable(Infallible, &'a PhantomData<T>),
}

A wrapper for a Rust object that can be either a reference or a value. This wrapper is used to carry a Rust (WASM ABI) reference provided by wasm_bindgen, but at the same time allows creation of a temporary object that can be created by interpreting the source user-supplied data. Cast then provides Cast::as_ref() to obtain the internally held reference and Cast::into_owned() where the latter will consume the value or clone the reference.

Variants

Ref

Fields

anchor: <T as RefFromWasmAbi>::Anchor

OwnedRef

Fields

js_value: Option<JsValue>

anchor: Option<<T as RefFromWasmAbi>::Anchor>

LongRef

Fields

anchor: <T as LongRefFromWasmAbi>::Anchor

Value

Fields

value: Option<T>

_Unreachable(Infallible, &'a PhantomData<T>)

Implementations

impl<'a, T> Cast<'a, T>

where T: RefFromWasmAbi<Abi = u32> + LongRefFromWasmAbi<Abi = u32> + Clone,

pub fn into_owned(self) -> T

Consume the Cast and return the owned value. If the Cast holds a reference, it will be cloned.

pub fn value(value: T) -> Self

Trait Implementations

impl<'a, T> AsRef<T> for Cast<'a, T>

where T: RefFromWasmAbi<Abi = u32> + LongRefFromWasmAbi<Abi = u32>,

fn as_ref(&self) -> &T

Obtain a reference to the internally held value.

impl<'a, T> Deref for Cast<'a, T>

where T: RefFromWasmAbi<Abi = u32> + LongRefFromWasmAbi<Abi = u32> + Deref,

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a, T> Drop for Cast<'a, T>

where T: RefFromWasmAbi<Abi = u32> + LongRefFromWasmAbi<Abi = u32> + 'a,

fn drop(&mut self)

Executes the destructor for this type.

impl<'a, T> From<T> for Cast<'a, T>

where T: RefFromWasmAbi<Abi = u32> + LongRefFromWasmAbi<Abi = u32>,

Cast T value (struct) into Cast<T>

fn from(value: T) -> Cast<'a, T>

Converts to this type from the input type.