Comparison of struct with Nullable member

[TC via Digitalmars-d-learn]

On Friday, 17 July 2015 at 15:30:42 UTC, Meta wrote:
> https://issues.dlang.org/show_bug.cgi?id=14804
>
> I'll probably be able to submit a PR for this sometime in the 
> next few days.

Thanks.
What I don't get is why this one works ok?

import std.typecons : Nullable;
struct Foo
{
	int bar;
	Nullable!int baz;
}
auto a = Foo(1);
auto b = Foo(1);
assert(a == b);

Also is there some "nicer" way to init the struct with nullable 
member with default constructor?
Now I'm using Foo(1, Nullable!int(2)) but just Foo(1, 2) would be 
much nicer.
Same with calling functions with nullable params.