Struct Iterable 

pub struct Iterable<F>(pub F);

Creates a JavaScript iterator from a Rust closure or iterator.

The returned JS object has next() and inherits [Symbol.iterator]() { return this } from %IteratorPrototype%, so it works with for...of, spread, and destructuring.

From a closure

let mut i = 0;
let iter = Iterable::from_fn(move || {
    i += 1;
    if i <= 3 { Some(i) } else { None }
});
ctx.globals().set("myIter", iter)?;
let result: Vec<i32> = ctx.eval("[...myIter]")?;
assert_eq!(result, vec![1, 2, 3]);

From an iterator

let iter = Iterable::from(vec![1, 2, 3]);
ctx.globals().set("myIter", iter)?;
let result: Vec<i32> = ctx.eval("[...myIter]")?;
assert_eq!(result, vec![1, 2, 3]);

Tuple Fields

0: F

Implementations

impl<F> Iterable<ClosureWrapper<F>>

pub fn from_fn(f: F) -> Self

Create from a FnMut() -> Option<T> closure.

Trait Implementations

impl<I: IntoIterator> From<I> for Iterable<IteratorWrapper<I::IntoIter>>

fn from(iter: I) -> Self

Converts to this type from the input type.

impl<'js, F> IntoJs<'js> for Iterable<F>

where F: IterableFn + 'js, F::Item: IntoJs<'js> + 'js,

fn into_js(self, ctx: &Ctx<'js>) -> Result<Value<'js>>