Macro brood::registry

macro_rules! registry {
    ($component:ty $(,$components:ty)* $(,)?) => { ... };
    () => { ... };
}

Creates a registry from the provided components.

This macro allows a registry to be defined without needing to manually create a heterogeneous list of components. Given an arbitrary number of components, this macro will arrange them into nested tuples forming a heterogeneous list.

A registry is not normally instantiated. Its main purpose is to be used as a generic in the definition of a World.

Example

use brood::{
    registry,
    World,
};

// Define components `Foo` and `Bar`.
struct Foo(u16);
struct Bar(f32);

// Define a registry containing those components.
type Registry = registry!(Foo, Bar);

// Define a world using the registry.
let world = World::<Registry>::new();