Yes it is possible

# multiplatform

[qlitzler]

Yes it is possible

[Evgeniy Zaharov]

but it looks that it does’t work (if I don’t have any mistake)
I have 3 modules, two common and one platform (jvm target). build.gradle dependencies example:

module1(common):
- empty dependencies
module2(common):
- compile project(':module1')
module3(jvm target)
- expectedBy project('module2')

As a result in module 3 there is no classes from module 1.
Do I have any mistakes (gradle 4.6, java 1.8_144)?

[qlitzler]

Try adding implementation project(':module1') in module 3

[Evgeniy Zaharov]

it helps to remove red highlighting in IDEA, but problem not solved.
I looked more closely at the errors and seemed a bit wrong pointed out errors. The module 2 is not compiled, because not find classes from module 1, but in IDEA all not highlighting by red, but also not compile.
I have try to change compile in module 2 to implementation, but it doesn’t help. Also I try to add both implementation and compile to module 2, but it doesn’t help.

[ilya.gorbunov]

If you want to implement both module1 and module2 with module3, you need to declare two expectedBy dependencies. This is prohibited now to have more than one expectedBy, but soon this restriction will be lifted.

[Evgeniy Zaharov]

@ilya.gorbunov thanks!

[Evgeniy Zaharov]

@ilya.gorbunov will it be possible also in future to have common module dependent from another common module with expect classes? Or expect classes may be only in “top” common module?

[ilya.gorbunov]

expect classes can be in each common module, but every common module must be implemented by a platform module.

[ilya.gorbunov]

So now your module1 must be implemented by some jvm module too.
However just compiling common module2 that has a compile dependency on common module1 should be fine.
Are you sure these errors occur when compiling module2 and not module3?

[Evgeniy Zaharov]

yes, the error still occurs in the module3. I was confused by the error that there classes from module2 that do not find classes from module1. But the error appears at the compilation stage of module3

[Evgeniy Zaharov]

a real example you can see here https://github.com/alfa-laboratory/kgen-doc-tools/tree/0.0.1
- common_nodes - module1
- common_parser - module2
- jvm_parser - module3

[ilya.gorbunov]

Yes, it seems that you want to implement both common_nodes and common_parser with jvm_parser on JVM. There's no way to do that in 1.2.30, but you can try the nightly build 1.2.40-dev-754 (https://bintray.com/kotlin/kotlin-dev/kotlin/1.2.40-dev-754) where multiple expectedBy dependencies are supported.

[Evgeniy Zaharov]

thanks! I will try it.
Do I understand right, that I need only to add compile project(':common_nodes') to common_parser and add both expectedBy from common_nodes and common_parser to jvm_parser?

[Evgeniy Zaharov]

wow, it works 🙂
at least it’s compiled.