override fun toString()

in kotlinx-coroutines-core/common/src/channels/BufferedChannel.kt [2615:2673]
54 lines of code
7 McCabe index (conditional complexity)

    override fun toString(): String {
        val sb = StringBuilder()
        // Append the close status
        when (sendersAndCloseStatus.value.sendersCloseStatus) {
            CLOSE_STATUS_CLOSED -> sb.append("closed,")
            CLOSE_STATUS_CANCELLED -> sb.append("cancelled,")
        }
        // Append the buffer capacity
        sb.append("capacity=$capacity,")
        // Append the data
        sb.append("data=[")
        val firstSegment = listOf(receiveSegment.value, sendSegment.value, bufferEndSegment.value)
            .filter { it !== NULL_SEGMENT }
            .minBy { it.id }
        val r = receiversCounter
        val s = sendersCounter
        var segment = firstSegment
        append_elements@ while (true) {
            process_cell@ for (i in 0 until SEGMENT_SIZE) {
                val globalCellIndex = segment.id * SEGMENT_SIZE + i
                if (globalCellIndex >= s && globalCellIndex >= r) break@append_elements
                val cellState = segment.getState(i)
                val element = segment.getElement(i)
                val cellStateString = when (cellState) {
                    is CancellableContinuation<*> -> {
                        when {
                            globalCellIndex < r && globalCellIndex >= s -> "receive"
                            globalCellIndex < s && globalCellIndex >= r -> "send"
                            else -> "cont"
                        }
                    }
                    is SelectInstance<*> -> {
                        when {
                            globalCellIndex < r && globalCellIndex >= s -> "onReceive"
                            globalCellIndex < s && globalCellIndex >= r -> "onSend"
                            else -> "select"
                        }
                    }
                    is ReceiveCatching<*> -> "receiveCatching"
                    is SendBroadcast -> "sendBroadcast"
                    is WaiterEB -> "EB($cellState)"
                    RESUMING_BY_RCV, RESUMING_BY_EB -> "resuming_sender"
                    null, IN_BUFFER, DONE_RCV, POISONED, INTERRUPTED_RCV, INTERRUPTED_SEND, CHANNEL_CLOSED -> continue@process_cell
                    else -> cellState.toString() // leave it just in case something is missed.
                }
                if (element != null) {
                    sb.append("($cellStateString,$element),")
                } else {
                    sb.append("$cellStateString,")
                }
            }
            // Process the next segment if exists.
            segment = segment.next ?: break
        }
        if (sb.last() == ',') sb.deleteAt(sb.length - 1)
        sb.append("]")
        // The string representation is constructed.
        return sb.toString()
    }