Struct neon::types::JsNull

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pub struct JsNull(/* private fields */);
Expand description

The type of JavaScript null primitives.

§Example

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

Implementations§

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impl JsNull

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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

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impl Debug for JsNull

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

Formats the value using the given formatter. Read more
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impl Value for JsNull

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

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

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fn to_raw(&self) -> Value

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

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impl RefUnwindSafe for JsNull

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impl !Send for JsNull

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impl !Sync for JsNull

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impl Unpin for JsNull

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impl UnwindSafe for JsNull

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.