looks like it's impossible to achieve this?

On Fri, May 17, 2013 at 4:24 PM, Simen Kjaeraas <simen.kjaras@gmail.com> wrote:

On Sat, 18 May 2013 01:13:00 +0200, Timothee Cour <thelastmammoth@gmail.com> wrote:

How to have alias this with an unaccessible member (x below).
Making the member private won't work as it'll disable all operations on
said member.

----
struct A(T){
T x;
//private T x would prevent alias this from doing anything useful
alias x this;
}
void main(){
auto a=A!int;
a++;//should do a.x++;
static assert(!__traits(compiles,a.x)); // I want this to hold

}
----

The common way to do it is with a read-only property:

struct A(T) {
private T x;

@property
T get() {
return x;
}

alias get this;
}

void main(){
auto a = A!int;
a++; //should do a.x++;
static assert(!__traits(compiles, a.x)); // This now holds!
static assert(__traits(compiles, a.get)); // As does this, which may or may not be palatable. :(
}

This has been discussed numerous times before, but I believe the current behavior is here to stay.

--
Simen