gcc/testsuite/gnat.dg/slice7.adb

   1 -- { dg-do compile }
   2 -- { dg-options "-gnatws" }
   3
   4 with System.Storage_Elements; use System.Storage_Elements;
   5 with Unchecked_Conversion;
   6 with Slice7_Pkg; use Slice7_Pkg;
   7
   8 procedure Slice7 is
   9
  10   type Discrete_Type is range 1 .. 32;
  11
  12   Max_Byte_Count : constant := 4;
  13   subtype Byte_Count_Type is Storage_Offset range 1..Max_Byte_Count;
  14
  15   subtype Buffer_Type is Storage_Array (Byte_Count_Type);
  16   function Convert_Put is new Unchecked_Conversion (Integer, Buffer_Type);
  17
  18   function Set_Buffer_Size return Byte_Count_Type is
  19   begin
  20     return 4;
  21   end;
  22
  23   Buffer_Size  : constant Byte_Count_Type := Set_Buffer_Size;
  24   Buffer_End   : constant Byte_Count_Type := Max_Byte_Count;
  25   Buffer_Start : constant Byte_Count_Type := Buffer_End - Buffer_Size + 1;
  26
  27   Obj : Discrete_Type;
  28
  29 begin
  30   Put (Convert_Put(Discrete_Type'Pos (Obj))
  31        (Buffer_Start..Buffer_End));
  32
  33   Put (Convert_Put(Discrete_Type'Pos (Obj) -
  34                    Discrete_Type'Pos (Discrete_Type'First))
  35        (Buffer_Start..Buffer_End));
  36 end;