[FIR] Don't generate implicit primary constructor for expect classes

compiler/fir/raw-fir/light-tree2fir/src/org/jetbrains/kotlin/fir/lightTree/converter/DeclarationsConverter.kt

@@ -51,6 +51,7 @@ import org.jetbrains.kotlin.fir.types.impl.FirTypeArgumentListImpl
 import org.jetbrains.kotlin.lexer.KtModifierKeywordToken
 import org.jetbrains.kotlin.lexer.KtTokens.*
 import org.jetbrains.kotlin.name.*
+import org.jetbrains.kotlin.psi.psiUtil.hasExpectModifier
 import org.jetbrains.kotlin.utils.addToStdlib.runIf
 
 class DeclarationsConverter(
@@ -767,6 +768,8 @@ class DeclarationsConverter(
         isEnumEntry: Boolean = false
     ): PrimaryConstructor? {
         if (primaryConstructor == null && !classWrapper.isEnumEntry() && classWrapper.hasSecondaryConstructor) return null
+        val classKind = classWrapper.classBuilder.classKind
+        if (primaryConstructor == null && (classWrapper.hasExpect() && classKind == ClassKind.ENUM_CLASS)) return null
         if (classWrapper.isInterface()) return null
 
         var modifiers = Modifier()

compiler/fir/raw-fir/psi2fir/src/org/jetbrains/kotlin/fir/builder/RawFirBuilder.kt

@@ -707,7 +707,10 @@ open class RawFirBuilder(
             // TODO: in case we have no primary constructor,
             // it may be not possible to determine delegated super type right here
             delegatedSuperTypeRef = delegatedSuperTypeRef ?: defaultDelegatedSuperTypeRef
-            if ((this !is KtClass || !this.isInterface()) && this.hasPrimaryConstructor()) {
+            val shouldNotGenerateImplicitPrimaryConstructor = hasExplicitPrimaryConstructor() || hasSecondaryConstructors() ||
+                    (hasExpectModifier() && classKind != ClassKind.ENUM_CLASS)
+
+            if ((this !is KtClass || !this.isInterface()) && (primaryConstructor != null || !shouldNotGenerateImplicitPrimaryConstructor)) {
                 val firPrimaryConstructor = primaryConstructor.toFirConstructor(
                     superTypeCallEntry,
                     delegatedSuperTypeRef,

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/expectActual.lazyBodies.txt

@@ -1,9 +1,5 @@
 FILE: expectActual.kt
     public? final? expect class MyClass : R|kotlin/Any| {
-        public? expect constructor(): R|MyClass| {
-            super<R|kotlin/Any|>()
-        }
-
     }
     public? final? expect fun foo(): String
     public? final? expect val x: Int

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/expectActual.txt

@@ -1,9 +1,5 @@
 FILE: expectActual.kt
     public? final? expect class MyClass : R|kotlin/Any| {
-        public? expect [ContainingClassKey=MyClass] constructor(): R|MyClass| {
-            super<R|kotlin/Any|>()
-        }
-
     }
     public? final? expect fun foo(): String
     public? final? expect val x: Int

compiler/psi/src/org/jetbrains/kotlin/psi/KtClassOrObject.kt

@@ -115,7 +115,7 @@ abstract class KtClassOrObject :
 
     override fun hasPrimaryConstructor(): Boolean = hasExplicitPrimaryConstructor() || !hasSecondaryConstructors()
 
-    private fun hasSecondaryConstructors(): Boolean = !secondaryConstructors.isEmpty()
+    fun hasSecondaryConstructors(): Boolean = !secondaryConstructors.isEmpty()
 
     override fun getSecondaryConstructors(): List<KtSecondaryConstructor> = getBody()?.secondaryConstructors.orEmpty()
 
@@ -198,4 +198,4 @@ fun KtClassOrObject.getOrCreateBody(): KtClassBody {
 }
 
 val KtClassOrObject.allConstructors
-    get() = listOfNotNull(primaryConstructor) + secondaryConstructors
+    get() = listOfNotNull(primaryConstructor) + secondaryConstructors