FIR checker: Split checkProperty util function.

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirDeclarationCheckerUtils.kt

@@ -47,6 +47,17 @@ internal fun checkProperty(
     modifierList: FirModifierList?,
     reporter: DiagnosticReporter,
     context: CheckerContext
+) {
+    checkPropertyInitializer(containingClass, modifierList, property, reporter, context)
+    checkPropertyAccessors(property, reporter, context)
+}
+
+private fun checkPropertyInitializer(
+    containingClass: FirRegularClass?,
+    modifierList: FirModifierList?,
+    property: FirProperty,
+    reporter: DiagnosticReporter,
+    context: CheckerContext
 ) {
     val inInterface = containingClass?.isInterface == true
     val hasAbstractModifier = modifierList?.modifiers?.any { it.token == KtTokens.ABSTRACT_KEYWORD } == true
@@ -67,12 +78,6 @@ internal fun checkProperty(
         }
     }
 
-    property.setter?.source?.let {
-        if (property.isVal) {
-            reporter.reportOn(it, FirErrors.VAL_WITH_SETTER, context)
-        }
-    }
-
     val isExpect = property.isExpect || modifierList?.modifiers?.any { it.token == KtTokens.EXPECT_KEYWORD } == true
 
     when {
@@ -127,6 +132,18 @@ internal fun checkProperty(
     }
 }
 
+private fun checkPropertyAccessors(
+    property: FirProperty,
+    reporter: DiagnosticReporter,
+    context: CheckerContext
+) {
+    property.setter?.source?.let {
+        if (property.isVal) {
+            reporter.reportOn(it, FirErrors.VAL_WITH_SETTER, context)
+        }
+    }
+}
+
 private val FirProperty.hasAccessorImplementation: Boolean
     get() = (getter !is FirDefaultPropertyAccessor && getter?.hasBody == true) ||
             (setter !is FirDefaultPropertyAccessor && setter?.hasBody == true)