Hi Folks, I just updated to `1.8.10` and my kmp library starts complaining for ```Expected class XXX...

# multiplatform

[Anmol Verma]

Hi Folks, I just updated to 1.8.10 and my kmp library starts complaining for

Expected class XXX does not have default constructor

this happens, when I have created a DSL in the commonMain like

public inline fun buildXXX(builderDsl: XXX.() -> Unit):
    XXX = XXX().apply(builderDsl).build()

anyone faced something like this before ? 🤔

[Chris Lee]

What does XXX look like? That code is specifically invoking it’s default constructor via XXX()

[Anmol Verma]

public expect class XXXDSL {
    public var byte: Int?

    public fun build(): XXX
}

public expect inline fun kmXXX(builderDsl: XXXDSL.() -> Unit):
    XXX

[Anmol Verma]

I actually modified it to something like this now, and it works 🤷

[russhwolf]

If you want to call XXX() from common, you need to do expect class XXX() rather than expect class XXX

[russhwolf]

(and then actual class XXX actual constructor() etc etc)

[Anmol Verma]

I was using kotlin poet and somehow it doesn’t generate expect class XXX() it just generates expect class XXX {}

[russhwolf]

I think you need to add the constructor explicitly in Kotlinpoet. It'll shorten it to XXX() if that's valid

[Anmol Verma]

Yes i am adding it using

FunSpec.constructorBuilder()
                        .build()

but somehow it doesn't add the () to the class name sad panda

TypeSpec
                .classBuilder(dslBuilderClassName)
                .addModifiers(modifier)
                .primaryConstructor(
                 ///// here FunSpec.constructorBuilder()
                        .build()
                )

[russhwolf]

In that case, I'm not sure what's going wrong. Maybe try asking in #squarelibraries

[Anmol Verma]

I mean for now, If i make the dsl builder fun to expect

public expect inline fun kmXXX(builderDsl: XXXDSL.() -> Unit):
    XXX

and generate an actual func for it with the impl code it works, so maybe it's a KMP thing 🤷‍♂️ not sure though 😑 , will post once i see this as a blocker. but really thanks for helping with your insights 🙏

[russhwolf]

I'm guessing that works because the actual declarations for the builder fun can find the actual declarations for the constructor, since it's all in platform code at that point. But it shouldn't be necessary.