Trait Driver 

pub trait Driver {
    // Required methods
    fn start(&mut self) -> Result<(), CnResult>;
    fn run(self: Box<Self>) -> Result<(), CnResult>;
    fn into_world(self: Box<Self>) -> World;
}

A loop that runs a World.

App is the implementation with nothing underneath it: a fixed virtual timestep, no window, and no wall clock. A host that has an operating system implements this over its own loop, and what such a host adds – pacing a frame against a display, following real elapsed time, catching a signal – stays on its side of the seam.

run reports whether the run failed rather than how it ended. A StepResult is a system’s verdict on its own tick, and a host ends a run for reasons no system sees, so a driver that reported one would owe readings for them.

run consumes the driver, since a run ends the world it was handed; into_world is the other way out, for a caller that wants the world back instead of run.

Required Methods

fn start(&mut self) -> Result<(), CnResult>

Build the world’s systems and run their init.

fn run(self: Box<Self>) -> Result<(), CnResult>

Run the world until it ends.

fn into_world(self: Box<Self>) -> World

Take the world back instead of running it.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl Driver for App