Reflection in D

[Adam D. Ruppe via Digitalmars-d-learn]

On Saturday, 28 January 2017 at 07:10:27 UTC, medhi558 wrote:
> I have a last question, currently i use :
> if(lc.name.indexOf("protocol.messages") != -1)

If they're all in the same module, you can also use the compile 
time reflection to scan the module for classes. That's

foreach(memberName; __traits(allMembers, mixin(__MODULE__)))
   static if(is(__traits(getMember, mixin(__MODULE__), memberName) 
: NetworkMessage) {
        if(memberName == runtime_string_of_class_name) {
           auto msg = new __traits(getMember, mixin(__MODULE__), 
memberName);
            // populate msg
        }
    }


Or something like that. The compile time stuff works well when 
everything is in a shared module.

If not, the runtime stuff has methods `base` and `interfaces` you 
can scan for your class. So like

foreach(c; mod.localClasses
   if(c.base is typeid(NetworkMessage) {
       // work with it
   }


Notice it is typeid for runtime, typeof at compile time, and this 
only gets direct children of NetworkMessage (though you could 
walk up the parent list to check more).