Bug 12791 – .tupleof does not take base class fields into account

----- class A { int a; } class B : A { int b; B clone() { auto b = new B; b.tupleof = this.tupleof; return b; } } void main() { auto b = new B; b.a = 10; b.b = 20; auto clone = b.clone(); assert(clone.b == 20); assert(clone.a == 10); // fails, it's 0 } ----- Since working with .tupleof is a fairly new and experimental feature I think the above could be labeled an enhancement request.

Nevermind, just saw the docs: ----- The .tupleof property returns an $(I ExpressionTuple) of all the fields in the class, excluding the hidden fields and the fields in the base class. ----- It's a shame because it makes deep object copying more complicated than a simple one-liner. Perhaps we could use some kind of Phobos helper template to implement deep-dup-ing.

I have been trying to find a way to dynamically retrieve all the fields of a derived class (and their value), including of course those of the base class. As you say and as described in the doc, `.tupleof` doesn't return fields from the base class (why?) Traits only help for static fields, and calling `myclassinstance.super.tupleof` doesn't work, nor does `myclassinstance.BaseClassName.tupleof` (as suggested in http://forum.dlang.org/post/[email protected]) Is there any way?

ok, sorry, indeed __traits can do it. I know this may be out of place here but might still be useful for people landing on this page: ----------- auto b = new B; // B inherits from A foreach(i, m; __traits(allMembers, B)) static if (__traits(compiles, to!string(__traits(getMember, b, m)))) writeln(m, " = ", __traits(getMember, b, m)); ----------- prints 'name = value' for all the fields (inherited or new, static or not, etc.) of an instance of class B.