Support Lazy Injection - Constructor DSL

[chrisjenx]

Is your feature request related to a problem? Please describe.
Fix for cyclic dependencies, you should be able to use Lazy<T> in constructors, but you'll get: No definition found for type 'kotlin.Lazy'.

Lazy is common use in other DI frame works

Describe the solution you'd like
This is possible manually already, but would be nice of koin supported it via it's singleOf/factoryOf

class ServiceOne(
  val serviceTwo: Lazy<ServiceTwo>
)

class ServiceTwo(
  val serviceOne: Lazy<ServiceOne>,
) 

module {
 factoryOf(::ServiceOne)
 factoryOf(::ServiceTwo)
}

Currently this will fail as Koin will not resolve the Lazy<*> type.

Describe alternatives you've considered

You can work around this limitation doing:

module {
  factory { ServiceOne(inject()) } 
  factory { ServiceTwo(inject()) }
}

You could define a Provider or koin.Lazy type if you wanted to leave the Kotlin one alone.

Target Koin project
koin-core

[arnaudgiuliani]

Constructor DSL won't be able to handle that directly. It's a known limitation. We need to wait for work on new generation DSL