How is `Symbol` special?

[PatrickHaecker]

@nsajko

Symbol is a mutable struct, just like Expr:

Although it’s not possible to mutate it, as it doesn’t have any fields.

Thanks for this correction, too. I also corrected it in my post above. But why do we have

@Patrick Häcker

struct MySymbol
    symbol::Symbol
end

julia> MySymbol(:a) == MySymbol(:a)
true

the field equality in MySymbol when Symbol is a mutable type? Is Symbol the same mutable/immutable hybrid as String? Both types have a lot of similarity, so I guess this would not be too surprising.