How to exploit kotlin's inline benefits when function has an object with a lambda parameter

lets say I have a data class like so

private data class StubModel<T>(
val invocation: ItemsFactory.() -> T?,
val returnValue: T
)


and I have a function like so

private fun <T> stubIt(stubs: List<StubModel<T>>) {
for (stub in stubs) {
whenever(stub.invocation()).thenReturn(stub.returnValue)
}
}


now when I try to the inline the stubIt function I dont get any performance benefits (i.e the lambda parameter in the StubModel is not inlined which is why I want the power of inline), how do I get kotlin compiler to inline the lambda parameter in the model class at the call site?

stubIt

StubModel

1 Answer
1

This is not possible. As a property of your StubModel, the invocation needs to be an object instance and stored as such. This is just, what inline functions are meant for to prevent. Also having a list as a parameter makes it impossible to inline anything, because how should the compiler know about the values at runtime.

StubModel

invocation

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