Expected class has no actual declaration

Question

I am doing a multiplatform project.

A part of my gradle file looks like this

...
kotlin {
    jvm()
    jvm("api")
    js()
    mingwX64("mingw")
    sourceSets {
        ...
        val jvmMain by getting {
            dependencies {
                implementation ("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
            }
        }
        val jvmTest by getting {
            dependencies {
                implementation ("org.jetbrains.kotlin:kotlin-test")
                implementation ("org.jetbrains.kotlin:kotlin-test-junit")
            }
        }
        val apiMain by getting {
            dependencies {
                dependsOn(jvmMain)
            }
        }
        val jsMain by getting {
            dependencies {
                implementation ("org.jetbrains.kotlin:kotlin-stdlib-js")
            }
        }
        ...
    }
}

Now in the commonsMain sources I get an IDE error (red underline) that says "expected class Sample has no actual declaration in apiMain", but apiMain depends on jvmMain which has the actual declaration.

I don't think I need an actual declaration in apiMain since I already have one in jvm.

Should I take a different approach in setting-up my source sets?

Anyway the project compiles fine and I can run apiMain, but the IDE error really annoys me.

Answer 1

This is a known IDE bug. See YouTrack ticket here.

For now, you can use @Suppress("NO_ACTUAL_FOR_EXPECT") to get rid of the warning in your IDE. I wouldn't really recommend it though, because you'll get a runtime crash instead of a compile-time error if you're missing any actual implementations.