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//! This is the core of the simulation.  It manages the various aspects of keeping track of the universe's
//! state and the state of all its cells and entities.  It drives the simulation forward by applying transformations
//! of the cells and processing actions of the entities sequentially.

use universe::Universe;
use cell::CellState;
use entity::{EntityState, MutEntityState};
use action::{CellAction, EntityAction};

pub mod serial;
pub mod parallel;
pub mod iterator;

pub trait Engine<C: CellState, E: EntityState<C>, M: MutEntityState, CA: CellAction<C>, EA: EntityAction<C, E>> {
    /// The main function of the simulation process.  This is called repeatedly to drive progress in the simulation and
    fn step(&mut self, &mut Universe<C, E, M, CA, EA>);
}