1 -> currentFailures.single()
            else -> MultipleFailuresResult(currentFailures.flatMap { if (it is MultipleFailuresResult) it.failures else listOf(it as SingleFailureResult) })
        }

    fun <T> syntacticIfNoFailures(evaluate: CheckBarrierContext.() -> SyntacticResult<T>): SyntacticResult<T> =
        when (currentFailures.size) {
            0 -> evaluate(object : CheckBarrierContext {})
            1 -> currentFailures.single()

            }

            collectingFailure(statements ?: tree.parsingError(node, "Lambda expression without statements"))

            syntacticIfNoFailures {
                val checkedStatements = statements!!.map { it.asBlockElement() }
                val b = Block(checkedStatements, tree.sourceData(block!!))