Trait OptionFromWasmAbi

pub trait OptionFromWasmAbi: FromWasmAbi {
    // Required method
    fn is_none(abi: &Self::Abi) -> bool;
}

Indicates that this type can be received from JS as Option<Self>.

This trait is used when implementing FromWasmAbi for Option<T>.

⚠️ 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 Methods

fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl OptionFromWasmAbi for bool

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for char

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for i8

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for i16

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for u8

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for u16

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for String

fn is_none(slice: &WasmSlice) -> bool

impl<T> OptionFromWasmAbi for Box<[T]>

where Self: FromWasmAbi<Abi = WasmSlice>,

fn is_none(slice: &WasmSlice) -> bool

impl<T> OptionFromWasmAbi for Vec<T>

where Box<[T]>: FromWasmAbi<Abi = WasmSlice>,

fn is_none(abi: &WasmSlice) -> bool

impl<T> OptionFromWasmAbi for NonNull<T>

fn is_none(js: &u32) -> bool

Implementors