* 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) {