Ref parameter: intended behavior or bug?

[Jarrett Billingsley]

"Regan Heath" <regan at netmail.co.nz> wrote in message 
news:fah2ic$2e20$1 at digitalmars.com...
> However, the liability (IMO):
>
>   Which of these functions modifies 'foo'?
>
>   Foo foo;
>   bar(foo);
>   baz(foo);
>
> You can't tell without inspecting the function signatures. Whereas with 
> pointers:
>
>   Foo foo;
>   bar(&foo);
>   baz(foo);
>
> It's quite clear, unless of course baz is passing by reference ;)

If D required 'ref' and 'out' at call site like C#, this wouldn't be an 
issue.