gcc/testsuite/gnat.dg/nested_agg_bitfield_constructor.adb

   1 -- { dg-do compile }
   2 -- { dg-options "-gnatws" }
   3 --              (bits of "Header" unused)
   4
   5 procedure Nested_Agg_Bitfield_Constructor is
   6
   7     type Uint64 is mod 2 ** 64;
   8     type Uint16 is mod 2 ** 16;
   9
  10     type Time_Stamp is record
  11        Sec  : Uint64;
  12        Year : Uint16;
  13     end record;
  14
  15     type Msg_Header is record
  16        Stamp : Time_Stamp;
  17     end record;
  18     for Msg_Header use record
  19        Stamp at 0 range 0 .. 64+16-1;
  20     end record;
  21     for Msg_Header'Size use 80;
  22
  23     type Msg is record
  24        Header : Msg_Header;
  25     end record;
  26
  27     for Msg use record
  28        Header at 0 range 0 .. 191;
  29     end record;
  30
  31     M : Msg := (Header => (Stamp => (2, 4)));
  32 begin
  33    null;
  34 end;