Struct sp_runtime_interface::pass_by::Codec[][src]

pub struct Codec<T: Codec>(_);

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

impl<T: Codec> PassByImpl<T> for Codec<T>[src]

impl<T: Codec> RIType for Codec<T>[src]

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
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impl<T> Send for Codec<T> where
    T: Send
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impl<T> Sync for Codec<T> where
    T: Sync
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impl<T> Unpin for Codec<T> where
    T: Unpin
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impl<T> UnwindSafe for Codec<T> where
    T: UnwindSafe
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Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> From<T> for T[src]

impl<T> Instrument for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> MaybeRefUnwindSafe for T where
    T: RefUnwindSafe
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impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.