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ErasedQueuedOperation

operation_queue

Trait ErasedQueuedOperation 

Source 
pub trait ErasedQueuedOperation: Debug {
    // Required method
    fn perform<'op>(&'op self) -> Pin<Box<dyn Future<Output = ()> + 'op>>;
}
Expand description

A dyn-compatible version of QueuedOperation. It is implemented for all types that implement QueuedOperation.

ErasedQueuedOperation makes QueuedOperation dyn-compatible by wrapping the opaque Future returned by perform into a Box, which is essentially an owned pointer and which size is known at compile time. This makes perform dispatchable from a trait object.

This return value is further wrapped into a Pin so that the Future can be awaited (since the receiver for Future::poll is Pin<&mut Self>).

In this context, “erased” refers to how this trait “erases” the opaque/generic return type of QueuedOperation::perform by turning it into a trait object.

Required Methods§

Source

fn perform<'op>(&'op self) -> Pin<Box<dyn Future<Output = ()> + 'op>>

Implementors§