Kerp, you are working on the Vulkan bindings? Great!
For C flags you should strongly consider using Nim's sets! I did that for the
high level GTK bindings recently. Have code like
type
RegionFlag* {.size: sizeof(cint), pure.} = enum
even = 1
odd = 2
first = 3
last = 4
only = 5
sorted = 6
RegionFlags* {.size: sizeof(cint).} = set[RegionFlag]
So you can pass procs sets as parameter. The empty set {}, or something like
{RegionFlags.sorted, RegionFlags.even}. It is not a very compact notation for
pure Enums unfortunately. I hope this will work fine for GTK, have not yet
tested. Of course that needs some mangling, flagNone=0 is generally removed,
first=8 becomes first=3.
Another solution is using distinc ints. Or enums, but than you have to define
some operations.
