Trait FutureSSS 

pub trait FutureSSS: Future + SSS { }

A marker which identifies a Future (but not necessarily its output) as Send, Sync, and 'static.

This trait is automatically implemented for futures which fulfill these requirements, and it is intended to be used as a shorthand for writing out each bound. For example:

use send_sync_static::{FutureSSS, SSS};
pub fn send_data<D: SSS>(data: D) -> impl FutureSSS {
  // Guarantees the async block is always Send, Sync, and 'static
  async move {
    // Do something here
    drop(data)
  }
}

This can be combined with RPITIT, an upcoming stable feature.

use send_sync_static::FutureSSS;
pub trait Database {
  fn add_user(&self, user: String) -> impl FutureSSS<Output = ()>;
}

Code written explicitly using Send, Sync, and 'static is fully interchangeable with this trait.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<F> FutureSSS for F

where F: Future + SSS,