pub struct CallOptions<'a> { /* private fields */ }
Expand description

A builder for making a JavaScript function call like parseInt("42").

The builder methods make it convenient to assemble the call from parts:

let x: Handle<JsNumber> = parse_int
    .call_with(&cx)
    .arg(cx.string("42"))
    .apply(&mut cx)?;

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impl<'a> CallOptions<'a>

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pub fn this<V: Value>(&mut self, this: Handle<'a, V>) -> &mut Self

Set the value of this for the function call.

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pub fn arg<V: Value>(&mut self, arg: Handle<'a, V>) -> &mut Self

Add an argument to the arguments list.

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pub fn args<A: Arguments<'a>>(&mut self, args: A) -> &mut Self

Replaces the arguments list with the given arguments.

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pub fn apply<'b: 'a, V: Value, C: Context<'b>>( &self, cx: &mut C ) -> JsResult<'b, V>

Make the function call. If the function returns without throwing, the result value is downcast to the type V, throwing a TypeError if the downcast fails.

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pub fn exec<'b: 'a, C: Context<'b>>(&self, cx: &mut C) -> NeonResult<()>

Make the function call for side effect, discarding the result value. This method is preferable to apply() when the result value isn’t needed, since it doesn’t require specifying a result type.

Trait Implementations§

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impl<'a> Clone for CallOptions<'a>

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fn clone(&self) -> CallOptions<'a>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl<'a> RefUnwindSafe for CallOptions<'a>

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impl<'a> !Send for CallOptions<'a>

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impl<'a> !Sync for CallOptions<'a>

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impl<'a> Unpin for CallOptions<'a>

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impl<'a> UnwindSafe for CallOptions<'a>

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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.