Reduce boiler-plate for binding singletons where all constructors parameters are DI instances

[Raman Gupta]

Currently, binding singletons where all the constructor dependencies are coming from Kodein is quite verbose, and requires update every time the number of constructor parameters changes.

It would be nice if there were a shortened syntax to automatically use the primary constructor of a class, passing in the result of instance() for every parameter.

e.g.

// replace
bindSingleton { Foo(instance(), instance(), instance(), instance(), instance()) }
// with something like this
bindSingleton { ::Foo }

This feature is now available in Koin. See https://insert-koin.io/docs/reference/koin-core/dsl-update.

[Raman Gupta]

Here is a gist that implements this for Kodein, based on the Koin implementation: https://gist.github.com/rocketraman/84302f408d34576052e07589e9e90b26.

[Romain Boisselle]

Hi,
This is available with a SNAPSHOT version.

You can use it with le maven repository https://s01.oss.sonatype.org/content/repositories/snapshots/ under the version 8.0.0-ktor-2-SNAPSHOT.

You can now bind with

val di = DI {
   bindSingleton { new(::A) }
   bindSingleton { new(::B) }
}

I would like to introduced an API like

val di = DI {
   bindSingletonOf(::A)
   bindSingletonOf(::B)
}

But I have some crashes with Kotlin/JS and the heavy usage of inlined function typeOf.

[Raman Gupta]

This is available with a SNAPSHOT version.

Great!

But I have some crashes with Kotlin/JS and the heavy usage of inlined function typeOf.

Hmm, have you reported this to YouTrack? Is that with the IR compiler, or legacy compiler, or both?

[Romain Boisselle]

It is an existing issue, that tackle the problem with a "don't use to many inline functions with typeOf()".

I will need to investigate on this, to know why.