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+-- C54A22A.ADA
+
+--                             Grant of Unlimited Rights
+--
+--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
+--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 
+--     unlimited rights in the software and documentation contained herein.
+--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 
+--     this public release, the Government intends to confer upon all 
+--     recipients unlimited rights  equal to those held by the Government.  
+--     These rights include rights to use, duplicate, release or disclose the 
+--     released technical data and computer software in whole or in part, in 
+--     any manner and for any purpose whatsoever, and to have or permit others 
+--     to do so.
+--
+--                                    DISCLAIMER
+--
+--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
+--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
+--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
+--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
+--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
+--     PARTICULAR PURPOSE OF SAID MATERIAL.
+--*
+-- CHECK ALL FORMS OF CHOICE IN CASE CHOICES.
+
+-- DAT 1/29/81
+-- SPS 1/21/83
+
+WITH REPORT;
+PROCEDURE C54A22A IS
+
+     USE REPORT;
+
+     TYPE T IS RANGE 1 .. 10;
+     C5 : CONSTANT T := 5;
+     SUBTYPE S1 IS T RANGE 1 .. 5;
+     SUBTYPE S2 IS T RANGE C5 + 1 .. 7;
+     SUBTYPE SN IS T RANGE C5 + 4 .. C5 - 4 + 7;  -- NULL RANGE.
+     SUBTYPE S10 IS T RANGE C5 + 5 .. T'LAST;
+
+BEGIN
+     TEST ("C54A22A", "CHECK ALL FORMS OF CASE CHOICES");
+
+     CASE T'(C5 + 3) IS
+          WHEN SN                       -- 9..8
+          | S1 RANGE 1 .. 0             -- 1..0
+          | S2 RANGE C5 + 2 .. C5 + 1   -- 7..6
+          | 3 .. 2                      -- 3..2
+               => FAILED ("WRONG CASE 1");
+
+          WHEN  S1 RANGE 4 .. C5        -- 4..5
+          | S1 RANGE C5 - 4 .. C5 / 2   -- 1..2
+          | 3 .. 1 + C5 MOD 3           -- 3..3
+          | SN                          -- 9..8
+          | S1 RANGE 5 .. C5 - 1        -- 5..4
+          | 6 .. 7                      -- 6..7
+          | S10                         -- 10..10
+          | 9                           -- 9
+          | S10 RANGE 10 .. 9 =>        -- 10..9
+               FAILED ("WRONG CASE 2");
+
+          WHEN C5 + C5 - 2 .. 8         -- 8
+               => NULL;
+     END CASE;
+
+     RESULT;
+END C54A22A;