type alias for 2D array generates compile time error about v HOT 4 CLOSED

No, you are correct, you have just run into a bug.

from v.

@pd-giz-dave because you assign at the labels var in your function a struct that does not exist ( struct assignation declaration in your example ) and you trying to return it. Moreover, return type of your function is not a struct.

It's not a bug.

from v.

The type alias documentation is this:
"Type aliases
To define a new type NewType as an alias for ExistingType, do type NewType = ExistingType.
This is a special case of a sum type declaration."
So is "[][]int" not a type?
I'm a newbie to V so I niaively interpreted a type alias like a C #define, ie. anywhere where ExistingType is valid so would NewType be.
My understanding is clearly wrong, but a fuller explanation in the docs would help.

from v.

If we change array to map on Labels, we'll get:

bug.v:7:16: error: direct map alias init is not possible, use Labels(map[int]string{}) instead

So, if we want to support array init via this struct way, probably we should support map too for consistency.

from v.