val kotlinType =
                    if (declaration is KtParameter && declaration.isVarArg) {
                        // we want full Array<out T> type for parity with FIR implementation
                        bindingContext[BindingContext.VALUE_PARAMETER, declaration]?.returnType
                    } else {

            Errors.DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE,
            Errors.DELEGATE_PD_METHOD_NONE_APPLICABLE,
        )

        private val DiagnosticFactoryForDeprecation<*, *, *>.factories: Array<DiagnosticFactoryWithPsiElement<*, *>>
            get() = arrayOf(warningFactory, errorFactory)
    }

    override val token: KtLifetimeToken
        get() = analysisSession.token

                    is FirNamedFunctionSymbol -> {
                        // arrayOf call with a single vararg argument.
                        if (resolvedSymbol.callableId.asSingleFqName() in ArrayFqNames.ARRAY_CALL_FQ_NAMES)
                            argumentList.arguments.singleOrNull()?.convertConstantExpression(builder)
                                ?: KtArrayAnnotationValue(emptyList(), sourcePsi, token)

 * and the argument, are compile-time constant as well.
 */
internal object FirCompileTimeConstantEvaluator {
    // TODO: Handle boolean operators, class reference, array, annotation values, etc.
    fun evaluate(
        fir: FirElement?,
        mode: KtConstantEvaluationMode,
    ): FirLiteralExpression<*>? =
        when (fir) {
            is FirPropertyAccessExpression -> {

            // used iff the qualified expression is.
            is KtQualifiedExpression ->
                parent.receiverExpression == child || (parent.selectorExpression == child && isUsed(parent))

            // Array accesses use both receiver and index.
            is KtArrayAccessExpression ->
                child in parent.indexExpressions || parent.arrayExpression == child

            substitutedType.varargElementType().asKtType()
        else
            substitutedType.asKtType()
    }

    /**
     * Expected type of the indexing parameter in array access, for example, in the following code:
     * ```
     * val map = mapOf<Int, String>()
     * map[k] = v
     * ```
     * `k` is indexing parameter and its expected type is `Int`.
     */

    if (analysisContext.builtIns.areSameArrayTypeIgnoringProjections(containingArrayType, constantType)) {
        // If an element in the array has the same type as the containing array, it's a spread component that needs
        // to be expanded here. (It should have the array element type instead.)
        (constantValue as ArrayValue).value.expandArrayAnnotationValue(containingArrayType, analysisContext)
    } else {

        get() {
            val sourcePsi = when {
                // array type for vararg parameters is not present in the code, so no need to handle it
                delegatedTypeRef?.source?.kind == KtFakeSourceElementKind.ArrayTypeFromVarargParameter -> null

                // but the array's underlying type is present with a fake source, and needs to be handled

        val firSymbol = useSiteSession.symbolProvider.getTopLevelCallableSymbols(kotlinPackage, identifier).firstOrNull {
            /* choose (for byte array)
             * public fun byteArrayOf(vararg elements: kotlin.Byte): kotlin.ByteArray
             */
            (it as? FirFunctionSymbol<*>)?.fir?.valueParameters?.singleOrNull()?.isVararg == true

    class KotlinResolveResult(element: PsiElement) : PsiElementResolveResult(element)

    @OptIn(KtAllowAnalysisOnEdt::class, KtAllowAnalysisFromWriteAction::class)
    override fun resolve(ref: KtReference, incompleteCode: Boolean): Array<ResolveResult> {
        check(ref is KtFirReference) { "reference should be FirKtReference, but was ${ref::class}" }
        check(ref is AbstractKtReference<*>) { "reference should be AbstractKtReference, but was ${ref::class}" }