Trait wasm_bindgen::convert::ReturnWasmAbi

pub trait ReturnWasmAbi: WasmDescribe {
    type Abi: WasmAbi;

    // Required method
    fn return_abi(self) -> Self::Abi;
}

A trait representing how to interpret the return value of a function for the wasm ABI.

This is very similar to the IntoWasmAbi trait and in fact has a blanket implementation for all implementors of the IntoWasmAbi. The primary use case of this trait is to enable functions to return Result, interpreting an error as “rethrow this to JS”

⚠️ Unstable

This is part of the internal convert module, no stability guarantees are provided. Use at your own risk. See its documentation for more details.

Required Associated Types

type Abi: WasmAbi

Same as IntoWasmAbi::Abi

Required Methods

fn return_abi(self) -> Self::Abi

Same as IntoWasmAbi::into_abi, except that it may throw and never return in the case of Err.

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl<T, E> ReturnWasmAbi for Result<T, E>

where T: IntoWasmAbi, E: Into<JsValue>, T::Abi: WasmAbi<Prim3 = (), Prim4 = ()>,

type Abi = Result<<T as IntoWasmAbi>::Abi, u32>

fn return_abi(self) -> Self::Abi

Implementors

impl<T: IntoWasmAbi> ReturnWasmAbi for T

type Abi = <T as IntoWasmAbi>::Abi