Struct sp_runtime_interface::pass_by::Codec

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pub struct Codec<T: Codec>(_);

Expand description

The implementation of the pass by codec strategy. This strategy uses a SCALE encoded representation of the type between wasm and the host.

Use this type as associated type for PassBy to implement this strategy for a type.

This type expects the type that wants to implement this strategy as generic parameter.

PassByCodec is a derive macro to implement this strategy.

Example

#[derive(codec::Encode, codec::Decode)]
struct Test;

impl PassBy for Test {
    type PassBy = Codec<Self>;
}

Trait Implementations

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impl<T: Codec> PassByImpl<T> for Codec<T>

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fn into_ffi_value(
instance: T,
context: &mut dyn FunctionContext
) -> Result<Self::FFIType>

Convert the given instance to the ffi value. Read more

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fn from_ffi_value(
context: &mut dyn FunctionContext,
arg: Self::FFIType
) -> Result<T>

Create T from the given ffi value. Read more

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impl<T: Codec> RIType for Codec<T>

The type is passed as u64.

The u64 value is build by length 32bit << 32 | pointer 32bit

Self is encoded and the length and the pointer are taken from the encoded vector.

type FFIType = u64

The ffi type that is used to represent Self.

Auto Trait Implementations

impl<T> RefUnwindSafe for Codec<T> where
T: RefUnwindSafe,

impl<T> Send for Codec<T> where
T: Send,

impl<T> Sync for Codec<T> where
T: Sync,

impl<T> Unpin for Codec<T> where
T: Unpin,

impl<T> UnwindSafe for Codec<T> where
T: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> Downcast for T where
T: Any,

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pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

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pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

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pub fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

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pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

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impl<T> DowncastSync for T where
T: Any + Send + Sync,

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pub fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send + 'static>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. Read more

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