gcc/testsuite/gnat.dg/in_out_parameter3.adb

   1 -- { dg-do run }
   2 -- { dg-options "-gnat12" }
   3
   4 procedure In_Out_Parameter3 is
   5
   6   type Arr is array (1..16) of Integer;
   7
   8   type Rec1 is record
   9     A : Arr;
  10     B : Boolean;
  11   end record;
  12
  13   type Rec2 is record
  14     R : Rec1;
  15   end record;
  16   pragma Pack (Rec2);
  17
  18   function F (I : In Out Rec1) return Boolean is
  19     A : Integer := I.A (1);
  20   begin
  21     I.A (1) := I.A (1) + 1;
  22     return (A > 0);
  23   end;
  24
  25   I : Rec2 := (R => (A => (others => 0), B => True));
  26   B : Boolean;
  27
  28 begin
  29   B := F (I.R);
  30   if B then
  31     raise Program_Error;
  32   end if;
  33   if I.R.A (1) /= 1 then
  34     raise Program_Error;
  35   end if;
  36   if F (I.R) = False then
  37      raise Program_Error;
  38   end if;
  39   if I.R.A (1) /= 2 then
  40     raise Program_Error;
  41   end if;
  42 end;