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Hi! Is there any way to track the causes of `SirUnsupportedType` appearing which later cause `java.lang.IllegalStateException: Attempt to bridge unbridgeable type: SirUnsupportedType.` ? I'm experimenting with Swift export in our project, and trying to export almost any module (trying to at least export dependencies before exporting our own modules) produces this exception. I've succeeded only with exporting single `kotlin-stdlib`, while having this exception with, for example, `kotlinx-datetime`, `ktor-http`, `ktor-client-core`  or `coroutines-core`. Maybe there is some list of supported/unsupported types, or I'm just setting up something wrong?

Hi! This sounds like a bug -- normally the bridge generator should handle `SirUnsupportedType` properly. See e.g. <https://github.com/JetBrains/kotlin/blob/9b117ee9e6dae8ad5abfc3df91a0644acc1e7492/native/swift/swift-export-standalone/src/org/jetbrains/kotlin/swiftexport/standalone/builders/buildFunctionBridges.kt#L94-L95|https://github.com/JetBrains/kotlin/blob/9b117ee9e6dae8ad5abfc3df91a0644acc1e7492/[…]/kotlin/swiftexport/standalone/builders/buildFunctionBridges.kt>.

So, there is no other way than to debug the Swift Export implementation.

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Hi! Seems like `patchCallableBodyAndGenerateRequest` doesn't check extension receiver parameters: while trying to bridge function `Instant::offsetIn` `typesUsed` contains 2 elements (return type and timeZone parameter), but this function also has receiver parameter which is `SirUnsupportedType` , that's the reason of exception. Also, just curious, why is `kotlinx.datetime.Instant` unsupported type? We will really need it to export our modules :)

&gt; Hi! Seems like `patchCallableBodyAndGenerateRequest` doesn't check extension receiver parameters: while trying to bridge function `Instant::offsetIn` `typesUsed` contains 2 elements (return type and timeZone parameter), but this function also has receiver parameter which is `SirUnsupportedType` , that's the reason of exception.
Nice catch!
This was fixed some time ago, and I can't reproduce this locally. Which version are you on?

&gt; Also, just curious, why is `kotlinx.datetime.Instant` unsupported type? We will really need it to export our modules :)
Because it has a supertype `Comparable&lt;Instant&gt;`, which is a generic interface. Neither interfaces nor generics are supported at the moment.

Alright, thank you!
I'm using Kotlin version 2.1.20

Kotlin 2.2.0-Beta1 should already have the fix for the exception. This version should be released somewhere in the middle of April.
But generally, with Swift Export, experimenting with dev builds also makes sense, because the project is in active development.