Lifetimes

Transient

Transients are constructed every time when requested. For transients, the following container types are supported:

• T: No container.
• Box<T>: A boxed type, where T can be a dyn T.

Singleton

Singletons are lazily constructed on the first access, and only a single instance can be created over the programs lifetime. When requested, a reference to the object is returned. The following container types are supported:

• Rc<T>: When multithread and tokio feature are disabled.
• Arc<T>: When the multithread or tokio is enabled.

The library offers a Ref type alias, which is aliasing the correct container, based on the enabled features.

The next step is to understand registration.