src/HOL/SPARK/Manual/document/loop_invariant.ads
author wenzelm
Wed, 13 Oct 2021 00:07:06 +0200
changeset 74506 d97c48dc87fa
parent 45044 2fae15f8984d
permissions -rw-r--r--
support HOL-Isar_Examples.Hoare as well (amending 403ce50e6a2a);

package Loop_Invariant
is

   type Word32 is mod 2 ** 32;

   procedure Proc1 (A : in Natural; B : in Word32; C : out Word32);
   --# derives C from A, B;
   --# post Word32 (A) * B = C;

   procedure Proc2 (A : in Natural; B : in Word32; C : out Word32);
   --# derives C from A, B;
   --# post Word32 (A) * B = C;

end Loop_Invariant;