iterating through members of bitfields

[Nestor via Digitalmars-d-learn]

On Wednesday, 18 January 2017 at 01:15:05 UTC, Ali Çehreli wrote:
> Not available but it should be possible to parse the produced 
> code:
>
> import std.bitmanip;
>
> string makeBitFieldPrinter(string fieldImpl) {
>     return q{
>         void printBitFields() const {
>             import std.stdio: writeln;
>             writeln("Please improve this function by parsing 
> fieldImpl. :)");
>         }
>     };
> }
>
> struct S {
>     enum myFields = bitfields!(int, "a", 24,
>                                byte, "b", 8);
>
>     pragma(msg, "This is the mixed-in bit field 
> code\n---------\n",
>            myFields, "\n----------");
>
>
>     mixin (myFields);
>     mixin (makeBitFieldPrinter(myFields));
> }
>
> void main() {
>     const s = S();
>     s.printBitFields();
> }
>
> Of course that would depend on the implementation of 
> bitfields(), which can change without notice.
>
> Ali

Thanks Ali, I was using bitfields according to documentation, but 
now I see that way I can't access the mixin string:

struct S {
     mixin(bitfields!(
         bool, "f1",    1,
         uint, "f2",    4,
         uint, "f3",    3)
     );
}