Trait SpawnFuture 

pub trait SpawnFuture<T>:
    Future<Output = T>
    + Send
    + 'static { }

A future use_future and spawn can run.

Native polls it on a thread of its own, so it has to be Send; wasm polls it on the one browser thread, so it does not. That is the only difference between the platforms, and it lives here so that user code names one trait.

Implementors

impl<T, F: Future<Output = T> + Send + 'static> SpawnFuture<T> for F

Available on non-WebAssembly only.