struct and class member alias

[Jarrett Billingsley]

"Stuart Murray" <stuart.w.murray at fakey.nospambots.gmail.com> wrote in 
message news:f458q0$2vea$1 at digitalmars.com...
>
> Interesting that it doesn't compile for you.. It definitely does for me 
> (using DMD v1.014)
> This is the example I referred to, if anyones interested:
>
> class A
> {
>    int foo(int x) { ... }
>    int foo(long y) { ... }
> }
>
> class B : A
> {
>    alias A.foo foo;
>    override int foo(long x) { ... }
> }
>
> Its in the documentation. As I said, it's slightly different thing, but it 
> seems to .. *match*..

Oh, well _that_ will compile :)  It's because "A.foo" is not an expression, 
it's a symbol.  You're saying "bring my superclass's implementation of foo 
into this namespace so it can be overloaded."  A.foo is a name, so you can 
alias it.  The "A." is just there as a marker to say where foo lives.

In your example, pos and size are class instances; they have no meaning 
until they've been new'ed.  Furthermore, pos.x is not a symbol, it's an 
expression -- it's an access to a member whose location can't be determined 
at compile time.  So, you can't alias it.