Nil-coalescing operators

[pbdot]

Since every value can also be nil and we can also be explicit:

global type Trace = record
    ent: Entity | nil
end

It would very nice to be able to:

if trace.ent?.name then
end

... and if we know valid:

local name: string =  trace.ent!.name

Coming from TypeScript the "or" operator didn't occur to me, and not sure if any value in nullish coalescing

local ent = trace.ent ?? world;

[hishamhm]

As long as every type contains nil, I don't think "being explicit" is a good idea there, because it gives the wrong impression to readers that T and T | nil are different things.

trace.ent?.name

Nil-coalescing operators would be nice, I'd like to have them, but implementing them properly would change the code generation a lot. So not a simple task!