Function std::iter::from_generator

pub fn from_generator<G>(generator: G) -> FromGenerator<G>where
    G: Generator<(), Return = ()> + Unpin,

🔬This is a nightly-only experimental API. (iter_from_generator #43122)

创建一个新的迭代器，每次迭代都调用提供的生成器。

类似于 iter::from_fn。

Examples

#![feature(generators)]
#![feature(iter_from_generator)]

let it = std::iter::from_generator(|| {
    yield 1;
    yield 2;
    yield 3;
});
let v: Vec<_> = it.collect();
assert_eq!(v, [1, 2, 3]);