com.github.rssh.appcontext

Application context is a way, to resolve components dependencies. Each component should provide an AppContextProvider, and AppContext[Component] will instantiate this components with dependencies.

AppContextAsyncProviderLookup is a helper trait used by InAppContext to search for async providers with correct priority:

1. AppContextAsyncProviders in enclosing scope (highest)
2. Local AppContextProvider (sync) converted via fromSyncProvider
3. AppContextAsyncProvider[F, T] defined in T's companion object (lowest)

This works because implicit search looks in the companion of the result type (T), but AppContextAsyncProviderLookup[F, T]'s companion is AppContextAsyncProviderLookup, not T. So givens defined here have priority over T's companion.

AppContextProvider is a type class that provides a value of type T

When we have AppContextProvider for a type T, then we can resolve T for dependency injection, using AppContext[T] syntax. AppContext[T]

AppContextProviderLookup is a helper trait used by AppContext[T] to search for providers with correct priority: AppContextProviders in enclosing scope takes precedence over AppContextProvider[T] defined in T's companion object.

This works because implicit search looks in the companion of the result type (T), but AppContextProviderLookup[T]'s companion is AppContextProviderLookup, not T. So givens defined here (fromProviders) have priority over T's companion.

Annotation to mark class as a key for component cache. Useful for cases when we have multiple implementation of some generic component. i.e.