Trait wasm_bindgen::convert::OptionFromWasmAbi

pub trait OptionFromWasmAbi: FromWasmAbi {
    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>.

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.

Implementations on Foreign Types

impl OptionFromWasmAbi for i8

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for u8

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for i16

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for u16

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for bool

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for char

fn is_none(js: &u32) -> bool

impl OptionFromWasmAbi for Box<[u8]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[i8]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[u16]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[i16]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[u32]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[i32]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[u64]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[i64]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[usize]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[isize]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[f32]>

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[f64]>

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 OptionFromWasmAbi for String

fn is_none(slice: &WasmSlice) -> bool

impl OptionFromWasmAbi for Box<[JsValue]>

fn is_none(slice: &WasmSlice) -> bool

impl<T> OptionFromWasmAbi for Box<[T]>where
    T: JsObject,

fn is_none(slice: &WasmSlice) -> bool

Implementors