"immutable struct_name" once okay in julia?

General Usage
1

I see codes like

immutable sector
    Sz::Int64
    kx::Float64
    ky::Float64
    z::Int64
end

in some github repository. Now it should be

struct sector
    Sz::Int64
    kx::Float64
    ky::Float64
    z::Int64
end

right? It seems that julia went through some drastic change.

2

Right

3

Yes, this was one of the last major changes before Julia 1.0.

4

What Github repository are you looking at ? There were many drastic changes for Julia pre-1.0. After 1.0 we mostly avoid breaking changes.

If we did make such a change, it would be called Julia 2.

See semantic versioning:

5

Seems to be this repo, and yes, this was last touched before 0.7/1.0 was released.