Can not get struct member addresses at compile time

[Ali Çehreli]

On 6/16/21 2:27 AM, Doeme wrote:

 > How does one get the address of a struct member?

Here is an experiment with offsetof and opDispatch:

struct Foo{
  ubyte bar;
  int i;
}

auto addrOf(T)(ref T t) {
   static struct AddrOf {
     void * origin;
     auto opDispatch(string member)() {
       return origin + mixin ("T." ~ member ~ ".offsetof");
     }
   }
   return AddrOf(&t);
}

import std.stdio;

__gshared Foo foo;

void main() {
   writeln(&foo);

   writeln(foo.addrOf.bar);
   writeln(foo.addrOf.i);

   // Alternative syntax
   writeln(addrOf(foo).bar);
   writeln(addrOf(foo).i);
}

Ali