Getproperty, decorations, inheritance in 0.7

General Usage
3

You can lift the argument to type domain, for example:

struct Foo
    x::Int
end
Base.getproperty(foo::Foo, s::Symbol) = bar(foo, Val(s))
bar(foo::Foo, ::Val{T}) where {T}  = getfield(foo, T) # fall back to getfield
bar(foo::Foo, ::Val{:y}) = println("Hello, world!")

julia> foo = Foo(4)
Foo(4)

julia> foo.x
4

julia> foo.y
Hello, world!

Edit: Which is what Mauro linked to.