Struct neon::types::JsNull

source ·
#[repr(transparent)]
pub struct JsNull(_);
Expand description

The type of JavaScript null primitives.

Example

cx.global()
    .get::<JsObject, _, _>(&mut cx, "console")?
    .call_method_with(&mut cx, "log")?
    .arg(cx.null())
    .exec(&mut cx)?;

Implementations§

source§

impl JsNull

source

pub fn new<'a, C: Context<'a>>(cx: &mut C) -> Handle<'a, JsNull>

Creates a null value.

Although this method can be called many times, all null values are indistinguishable.

See also: Context::null

Trait Implementations§

source§

impl Debug for JsNull

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
source§

impl Value for JsNull

source§

fn to_string<'cx, C: Context<'cx>>(&self, cx: &mut C) -> JsResult<'cx, JsString>

source§

fn as_value<'cx, C: Context<'cx>>(&self, _: &mut C) -> Handle<'cx, JsValue>

source§

fn to_raw(&self) -> Value

Available on crate feature sys only.
Get a raw reference to the wrapped Node-API value.
source§

unsafe fn from_raw<'cx, C: Context<'cx>>( cx: &C, value: Value ) -> Handle<'cx, Self>

Available on crate feature sys only.
Creates a value from a raw Node-API value. Read more

Auto Trait Implementations§

§

impl RefUnwindSafe for JsNull

§

impl !Send for JsNull

§

impl !Sync for JsNull

§

impl Unpin for JsNull

§

impl UnwindSafe for JsNull

Blanket Implementations§

source§

impl<T> Any for Twhere T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.