Dependency injection for the rust.

This is currently in state of proof-of-concept. It currently does not support

• providing variables to the injector
• injection of variable into other method in injector.
• returning references while defining injection rules.

Note: It works by cloing all components, so you have to return Arc<T> or Rc<T>. This is because the injector cannot know how much time it will be injected.

Usage

 fn main() {
     let injector = ok_injector();
     let my_handler = injector.inject(handler);

     my_handler()
 }

 pub trait Db {
     fn call(&self);
 }

 #[inject]
 pub fn handler(#[inject] db: Arc<dyn Db>) {
     db.call()
 }

 struct OkDb {}

 impl Db for OkDb {
     fn call(&self) {}
 }

 #[injector]
 fn ok_injector() {
     fn db() -> Arc<dyn Db> {
         Arc::new(OkDb {})
     }
 }