> Yes. What would be legal would be:
>
> let x = @{a: 10};
> x = @{a: 20};
That seems a rather heavy-handed restriction.
> No, it is legal to do `f(foo.x)` but, depending on the type of `foo.x`,
> `f()` might be restricted in what it can do with the reference. For
> example:
How about this:
let x = @{mutable y: 10};
let f = fn@(u: int) { x.y = 20; log(error, u); }
f(x.y); // Where f's arg is passed by reference, whichever
notation you'd use for that
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