gcc/testsuite/gnat.dg/discr38.adb

   1 -- { dg-do compile }
   2
   3 procedure Discr38 is
   4
   5    type Enum is (OK,
   6                  NOT_CONNECTED,
   7                  DISCONNECTED,
   8                  REQUEST_Q_EMPTY,
   9                  SERVER_UNAVAILABLE,
  10                  BUFFER_TOO_SMALL,
  11                  NO_FREE_SLOT,
  12                  RAISE_EXCEPTION,
  13                  REQUEST_CANCELLED,
  14                  REQUEST_IN_PROGRESS,
  15                  SERVER_BUSY,
  16                  BLOCK_ACKNOWLEDGE);
  17
  18    type R (Status : Enum := OK) is record
  19       Status_Block : Integer;
  20       case Status is
  21       when RAISE_EXCEPTION =>
  22          I : Integer;
  23       when OK =>
  24          Length : Natural;
  25          Data   : Integer;
  26       when others =>
  27          null;
  28       end case;
  29    end record;
  30    for R use record
  31       Status        at  0 range 0 .. 7;
  32       Status_Block  at  4 range 0 .. 31;
  33       Length        at  8 range 0 .. 31;
  34    end record;
  35
  36    Nil : constant R := (OK, 1, 0, 1);
  37
  38 begin
  39    null;
  40 end;