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Command

unlit_ecs::command

Trait Command 

Source 
pub trait Command: 'static {
    // Required method
    fn apply(
        self: Box<Self>,
        world: &mut World,
    ) -> Result<(), EntityAccessError>;
}
Expand description

A structural change that can be applied later.

Required Methods§

Source

fn apply(self: Box<Self>, world: &mut World) -> Result<(), EntityAccessError>

Apply the change to the world.

Most commands cannot fail: they check what they are allowed to touch when they are queued and again when they are applied, and a change that no longer applies is dropped. Only a command that spawns on a reserved handle has something to report, so it answers the error instead of panicking on it.

Dyn Compatibility§

This trait is dyn compatible.

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

Implementors§