Struct ConvertAndReturnAs 

pub struct ConvertAndReturnAs<T, U, V>(/* private fields */);

Return T through the FFI boundary by first converting it to U and then to V on the host’s side, and then converting it back to U and then to T in the runtime.

This is useful to pass types when the conversion to/from FFI type cannot be implemented directly, e.g. because of the orphan rule.

Raw FFI type: same as V’s FFI type

Trait Implementations

impl<T, U, V> IntoFFIValue for ConvertAndReturnAs<T, U, V>

where V: RIType + IntoFFIValue + Primitive, <V as RIType>::Inner: From<U>, U: From<Self::Inner>,

Available on non-substrate_runtime only.

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

Convert Self::Inner into an FFI value.

impl<T, U, V> RIType for ConvertAndReturnAs<T, U, V>

where V: RIType,

type FFIType = <V as RIType>::FFIType

The raw FFI type that is used to pass Self through the host <-> runtime boundary.

type Inner = T

The inner type without any serialization strategy wrapper.