gcc/testsuite/gnat.dg/scos1.adb

   1 --  { dg-do compile }
   2 --  { dg-options "-gnata -gnateS" }
   3
   4 procedure SCOs1 with SPARK_Mode => On is
   5
   6    LEN_IN_BITS : constant := 20;
   7
   8    M_SIZE_BYTES : constant := 2 ** LEN_IN_BITS;
   9    ET_BYTES : constant := (M_SIZE_BYTES - 4);
  10
  11    type T_BYTES  is new Integer range 0 .. ET_BYTES  with Size => 32;
  12    subtype TYPE5_SCALAR is T_BYTES
  13      with Dynamic_Predicate => TYPE5_SCALAR mod 4 = 0;
  14
  15    type E_16_BYTES is new Integer;
  16    subtype RD_BYTES is E_16_BYTES
  17      with Dynamic_Predicate => RD_BYTES mod 4 = 0;
  18
  19    function "-" (left : TYPE5_SCALAR; right : RD_BYTES) return TYPE5_SCALAR
  20    is ( left - TYPE5_SCALAR(right) )
  21      with Pre => TYPE5_SCALAR(right) <= left and then
  22      left - TYPE5_SCALAR(right) <= T_BYTES'Last, Inline_Always;
  23
  24 begin
  25    null;
  26 end SCOs1;