Storing "auto" types in classes

[Jonathan M Davis]

On Friday, July 02, 2010 09:46:37 Rob Adelberg wrote:
> I'm sure this has come up before, but I want to store something like an
> std.array appender in a class.  All of the examples use auto for the type
> but you can't put that in a class definition, so what do you put?
> 
> Example:
> class packet{...}
> 
> class A {
> 
>    packet []  packetlist;
>    appender!(packet) packappender;   // wrong format
> 
>    this () {
>       packetlist = new packet[0];
>       packappender = appender(&packetlist);
>    }
> 
> }
> 
> What's the format to store the appender in the class?

In this case, the type would be Appender!(packet[]). However, if you ever want 
to know the exact type of something, one way to do it is something like this:

writeln(typeid(appender(&packelist)));

It will print out the type of the expression for you.

- Jonathan M Davis