flyx wrote: > And yes, something between array and seq would be nice. But currently, Nim's > type system does not allow a type with a runtime-calculated length parameter. > Allowing it would be a hack similar to C VLAs.
No hack involved here. The length parameter can be part of the object like seq rather than part of the type like array. openarray-accepting procs should not care since they can receive seqs anyway with run-time variable everything or arrays with compile-time fixed everything. One might argue that I/others could just do their own concept which is true. The standard lib has lots of openarray-accepting routines that would work fine with post-init-fixed seq-like objects, though. So, not having such a type in the standard lib that's part of openarray feels unnecessarily inflexible, but on this I think we agree since you said it would be nice. It may just be easier than first imagined. :)
