Trait TryFromJs

pub trait TryFromJs<'cx>
where
    Self: Sealed + Sized,
{
    type Error: TryIntoJs<'cx>;

    // Required method
    fn try_from_js(
        cx: &mut Cx<'cx>,
        v: Handle<'cx, JsValue>,
    ) -> NeonResult<Result<Self, Self::Error>>;

    // Provided method
    fn from_js(cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>) -> NeonResult<Self> { ... }
}

Extract Rust data from a JavaScript value

Required Associated Types

type Error: TryIntoJs<'cx>

Required Methods

fn try_from_js( cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>, ) -> NeonResult<Result<Self, Self::Error>>

Extract this Rust type from a JavaScript value

Provided Methods

fn from_js(cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>) -> NeonResult<Self>

Same as TryFromJs, but all errors are converted to JavaScript exceptions

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl<'cx> TryFromJs<'cx> for bool

type Error = TypeExpected<JsBoolean>

fn try_from_js( cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>, ) -> NeonResult<Result<Self, Self::Error>>

impl<'cx> TryFromJs<'cx> for f64

type Error = TypeExpected<JsNumber>

fn try_from_js( cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>, ) -> NeonResult<Result<Self, Self::Error>>

impl<'cx> TryFromJs<'cx> for ()

type Error = Infallible

fn try_from_js( _cx: &mut Cx<'cx>, _v: Handle<'cx, JsValue>, ) -> NeonResult<Result<Self, Self::Error>>

impl<'cx> TryFromJs<'cx> for String

type Error = TypeExpected<JsString>

fn try_from_js( cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>, ) -> NeonResult<Result<Self, Self::Error>>

impl<'cx, L, R> TryFromJs<'cx> for Either<L, R>

where L: TryFromJs<'cx>, R: TryFromJs<'cx>,

type Error = Error<<L as TryFromJs<'cx>>::Error, <R as TryFromJs<'cx>>::Error>

fn try_from_js( cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>, ) -> NeonResult<Result<Self, Self::Error>>

impl<'cx, T> TryFromJs<'cx> for Option<T>

where T: TryFromJs<'cx>,

type Error = <T as TryFromJs<'cx>>::Error

fn try_from_js( cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>, ) -> NeonResult<Result<Self, Self::Error>>

impl<'cx, T> TryFromJs<'cx> for Vec<T>

where JsTypedArray<T>: Value, T: Binary,

type Error = TypeExpected<JsTypedArray<T>>

fn try_from_js( cx: &mut Cx<'cx>, v: Handle<'cx, JsValue>, ) -> NeonResult<Result<Self, Self::Error>>

Implementors

impl<'cx> TryFromJs<'cx> for ArrayBuffer

type Error = TypeExpected<JsBuffer>

impl<'cx> TryFromJs<'cx> for Buffer

type Error = TypeExpected<JsBuffer>

impl<'cx> TryFromJs<'cx> for Date

Available on crate feature napi-5 only.

type Error = TypeExpected<JsDate>

impl<'cx, O> TryFromJs<'cx> for Root<O>

where O: Object,

type Error = TypeExpected<O>

impl<'cx, T> TryFromJs<'cx> for Json<T>

where for<'de> T: Deserialize<'de>,

Available on crate feature serde only.

type Error = Error

impl<'cx, T> TryFromJs<'cx> for Boxed<T>

where T: Clone + 'static,

type Error = TypeExpected<JsBox<T>>

impl<'cx, V> TryFromJs<'cx> for Handle<'cx, V>

where V: Value,

type Error = TypeExpected<V>