amethyst_core 0.15.3

Amethyst core
Documentation 
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use specs::{RunNow, System, World};

/// Initializes a `System` with some interaction with the `World`.
pub trait SystemDesc<'a, 'b, S>
where
    S: System<'a>,
{
    /// Builds and returns a `System`.
    ///
    /// # Parameters
    ///
    /// * `world`: `World` that the system will run on.
    fn build(self, world: &mut World) -> S;
}

/// Initializes a `RunNow` with some interaction with the `World`.
pub trait RunNowDesc<'a, 'b, S>
where
    S: RunNow<'b>,
{
    /// Builds and returns a `System`.
    ///
    /// # Parameters
    ///
    /// * `world`: `World` that the system will run on.
    fn build(self, world: &mut World) -> S;
}