Introspection - how?

[Daniel Keep]

Vincent wrote:
> Hello, guys!
> I have a question related D's introspection. I try to solve serialization task (implementing JSON protocol)
> and stuck at very start: getting all class' fields with types, names and values. Just test code:
> 
>     Thread d;
>     foreach(mi; d.classinfo.getMembers(null))
> 13:     writefln(mi.name);
> 
> test.d(13): Error: function object.MemberInfo.name () does not match parameter types ()
> test.d(13): Error: mi.name can only be called on a mutable object, not const(MemberInfo)
> 
> I'm confused with such strange error: what is a problem with using MemberInfo? I just try to GET info, not WRITE!
> Anybody have idea how to get info about members? (see task above)
> Thanks.

It doesn't matter; getMembers doesn't currently DO anything.  Even if
you cast away the const-ness, you'd get no results.

You have to do this at compile-time with a concrete type for now.

  -- Daniel