FIR checker: report PROPERTY_AS_OPERATOR

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDataClassConverters.kt

@@ -3131,6 +3131,13 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.PROPERTY_AS_OPERATOR) { firDiagnostic ->
+        PropertyAsOperatorImpl(
+            firSymbolBuilder.variableLikeBuilder.buildVariableSymbol(firDiagnostic.a.fir),
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.TOPLEVEL_TYPEALIASES_ONLY) { firDiagnostic ->
         ToplevelTypealiasesOnlyImpl(
             firDiagnostic as FirPsiDiagnostic,

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnostics.kt

@@ -2186,6 +2186,11 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         abstract val operator: String
     }
 
+    abstract class PropertyAsOperator : KtFirDiagnostic<PsiElement>() {
+        override val diagnosticClass get() = PropertyAsOperator::class
+        abstract val property: KtVariableSymbol
+    }
+
     abstract class ToplevelTypealiasesOnly : KtFirDiagnostic<KtTypeAlias>() {
         override val diagnosticClass get() = ToplevelTypealiasesOnly::class
     }

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnosticsImpl.kt

@@ -3522,6 +3522,14 @@ internal class AssignmentOperatorShouldReturnUnitImpl(
     override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
 }
 
+internal class PropertyAsOperatorImpl(
+    override val property: KtVariableSymbol,
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.PropertyAsOperator(), KtAbstractFirDiagnostic<PsiElement> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
 internal class ToplevelTypealiasesOnlyImpl(
     firDiagnostic: FirPsiDiagnostic,
     override val token: ValidityToken,