My guess purely: I thought if a immutable type is big enough, it was
implemented as a reference type. (Otherwise each time when it is passed to
a function, a lot of memory copy is performed).
immutable Big
a1::Int
a2::Int
...
a1000::Int
end
On Thursday, January 21, 2016 at 3:55:49 AM UTC, [email protected] wrote:
>
> Julia's immutable types are value types and mutable types are reference
> types. In the Julia docs on types there is a paragraph that begins:
>
> "It is instructive, particularly for readers whose background is C/C++,
> to consider why these two properties go hand in hand. [...]"
>
> However this paragraph only explains why value types should be immutable,
> it doesn't describe why you can't define a reference type that is
> immutable. So, why not?
>
