On Friday, January 2, 2015 9:19:10 PM UTC-5, ele...@gmail.com wrote:
>
> This seems to work, providing the equivalent to C++ class data members,
> any better suggestions?
>
> immutable MyObj_a end
>
> type MyObj
> MyObj() = new()
>
> a::Int=0
> MyObj(::Type{MyObj_a}) = a
> function MyObj(::Type{MyObj_a}, i::Int)
> a = i
> end
> end
>
> # nicer wrappers
>
> get_a(::Type{MyObj}) = MyObj(MyObj_a)
> set_a(::Type{MyObj}, i::Int) = MyObj(MyObj_a, i)
>
> # and an immutable for luck
>
> get_b(::Type{MyObj}) = 55
>
> Cheers
> Lex
>
This is a very interesting example of the edges of the language. I didn't
know you could write constructors that didn't return new type objects.
Going for maximum terseness, all you need is:
type X
_val::Int = 0
X() = _val
X(v::Int) = _val = v
end
And now, X(10) sets the value, X() retrieves it, and an actual X object can
never be constructed. Pretty cool actually, though I don't know if it would
work in 0.3.
