entity-store-code-gen

lib.rs:

Code generator for a game data store. Data is organised into "components" - eaching having a particular rust type. "Entities" - objects in the game world - are collections of components. A component can be associated with an entity by storing the id of the entity in that component's store.

A simple example:

struct EntityStore {
    position: HashMap<EntityId, ::cgmath::Vector2<f32>>,
    solid: HashSet<EntityId>,
    tile: HashSet<EntityId, MyTileType>,
}

Note the solid field is a HashSet rather than a HashMap. Sets are used to store flags with no associated data.

This must be used from a build script. A simple build script looks like:

extern crate entity_store_code_gen;

fn main() {
    entity_store_code_gen::generate(include_str!("spec.toml"), "entity_store.rs").unwrap()
}

Use entity_store_helper to help make use of the generated code.