So the use case is a simple entity component system. What shirlyquirk posted
comes quite close to what I want, and I think something like this is what I'll
use. However, this requires me to manually "register" all component types in
the ComponentManager, which I wanted to avoid.
Basically I hoped that
type ImportantStuff = object
littleMember[T]: seq[T]
func get[T](a: ImportantStuff, i: int): T =
a.littleMember[T][i]
var c: ImportantStuff
discard c.get[int](12)
discard c.get[float](5)
discard c.get[ComponenTypeA](5)
Run
would expand to
type ImportantStuff = object
littleMember_int: seq[int]
littleMember_float: seq[float]
littleMember_ComponentTypeA: seq[ComponentTypeA]
func get[T](a: ImportantStuff, i: int): T =
when T is float: a.littleMember_float[i]
elif T is int: a.littleMember_int[i]
elif T is ComponentTypeA: a.littleMember_ComponentTypeA
var c: ImportantStuff
discard c.get[int](12)
discard c.get[float](5)
discard c.get[ComponentTypeA](1)
Run
