Struct JsRest 

pub struct JsRest<'a>(pub &'a [JsValue]);

An argument that when used in a JS function will empty the list of JS arguments as JsValues. This can be used for having the rest of the arguments in a function. It should be the last argument of your function, before the Context argument if any.

For example,

let sums = (|args: JsRest, context: &mut Context| -> i32 {
    args.iter()
        .map(|i| i.try_js_into::<i32>(context).unwrap())
        .sum::<i32>()
})
.into_js_function_copied(&mut context);

let result = sums
    .call(
        &JsValue::undefined(),
        &[JsValue::from(1), JsValue::from(2), JsValue::from(3)],
        &mut context,
    )
    .unwrap();
assert_eq!(result, JsValue::new(6));

Tuple Fields

0: &'a [JsValue]

Implementations

impl<'a> JsRest<'a>

pub fn into_inner(self) -> &'a [JsValue]

Consumes the JsRest and returns the inner list of JsValue.

pub fn to_vec(self) -> Vec<JsValue>

Transforms the JsRest into a Vec<JsValue>.

pub fn iter(&self) -> impl Iterator<Item = &JsValue>

Returns an iterator over the inner list of JsValue.

pub fn len(&self) -> usize

Returns the length of the inner list of JsValue.

pub fn is_empty(&self) -> bool

Returns true if the inner list of JsValue is empty.

Trait Implementations

impl<'a> Clone for JsRest<'a>

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

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for JsRest<'a>

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

Formats the value using the given formatter.

impl<'a> From<&'a [JsValue]> for JsRest<'a>

fn from(values: &'a [JsValue]) -> Self

Converts to this type from the input type.

impl<'a> IntoIterator for JsRest<'a>

type Item = &'a JsValue

The type of the elements being iterated over.

type IntoIter = Iter<'a, JsValue>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.