@cdome The distinct helped, but was not enough. It seems Nim has problems
deciding how to convert an "uint" to a string, so I also needed to specify
"proc $(uint)":
const MAX_THREADS* = 64
const MAX_TOPICS* = 1048576
const MAX_PROCESSES* = int(4294967296'i64 div int64(MAX_THREADS *
MAX_TOPICS))
type
ThreadID* = distinct range[0'u8..uint8(MAX_THREADS-1)]
## Thread ID, within process.
ProcessID* = distinct range[0'u16..uint16(MAX_PROCESSES-1)]
## Process ID of thread.
TopicID* = distinct range[0'u32..uint32(MAX_TOPICS-1)]
## TopicID, within thread.
proc `$` *(i: uint): string {.inline.} =
$uint64(i)
proc `==` *(a, b: ThreadID): bool {.borrow.}
proc `$` *(id: ThreadID): string {.borrow.}
proc `==` *(a, b: ProcessID): bool {.borrow.}
proc `$` *(id: ProcessID): string {.borrow.}
proc `==` *(a, b: TopicID): bool {.borrow.}
proc `$` *(id: TopicID): string {.borrow.}
type
QueueID* = distinct uint32
## The complete queue ID, containing the process ID, thread ID and
topic ID.
proc tid*(queue: QueueID): ThreadID {.inline, noSideEffect.} =
## Dummy simplified impl!
ThreadID(uint8(queue))
proc pid*(queue: QueueID): ProcessID {.inline, noSideEffect.} =
## Dummy simplified impl!
ProcessID(uint16(queue))
proc cid*(queue: QueueID): TopicID {.inline, noSideEffect.} =
## Dummy simplified impl!
TopicID(uint32(queue))
proc `$` *(queue: QueueID): string =
## String representation of a QueueID.
$pid(queue) & "." & $tid(queue) & "." & $cid(queue)
