[FE 1.0] Prohibit access to members of companion of enum from enum entry initializer

^KT-49461 Fixed
^KT-49110

compiler/testData/diagnostics/tests/controlFlowAnalysis/uninitializedCompanionOfEnum_before.fir.kt

@@ -0,0 +1,39 @@
+// LANGUAGE: -ProhibitAccessToEnumCompanionMembersInEnumConstructorCall
+// ISSUE: KT-49110
+
+enum class SomeEnum(val x: Int) {
+    A(<!UNINITIALIZED_ENUM_COMPANION!>companionFun<!>().length),// UNINITIALIZED_ENUM_COMPANION
+    B(<!UNINITIALIZED_VARIABLE!>companionProp<!>.length), // UNINITIALIZED_VARIABLE
+
+    C(SomeEnum.<!UNINITIALIZED_ENUM_COMPANION!>companionFun<!>().length),
+    D(<!UNINITIALIZED_VARIABLE!>SomeEnum.companionProp<!>.length),
+
+    E(SomeEnum.<!UNINITIALIZED_ENUM_COMPANION!>Companion<!>.companionFun().length),
+    F(<!UNINITIALIZED_VARIABLE!>SomeEnum.Companion.companionProp<!>.length); // UNINITIALIZED_VARIABLE
+
+    companion object {
+        val companionProp = "someString"
+        fun companionFun(): String = "someString"
+    }
+}
+
+enum class OtherEnum(val x: Int) {
+    G(extensionFun().length), // UNINITIALIZED_ENUM_COMPANION
+    H(extensionProp.length),
+
+    I(OtherEnum.extensionFun().length),
+    J(OtherEnum.extensionProp.length),
+
+    K(OtherEnum.Companion.extensionFun().length),
+    L(OtherEnum.Companion.extensionProp.length);
+
+    companion object {
+        val companionProp = "someString"
+        fun companionFun(): String = "someString"
+    }
+}
+
+fun OtherEnum.Companion.extensionFun(): String = companionFun()
+val OtherEnum.Companion.extensionProp: String
+    get() = companionProp
+