c41105a.ada

来自「用于进行gcc测试」· ADA 代码 · 共 105 行

-- C41105A.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.
--*
-- OBJECTIVE:
--     CHECK THAT CONSTRAINT_ERROR IS RAISED IF THE NAME PART OF AN
--     INDEXED COMPONENT DENOTES AN ACCESS OBJECT WHOSE VALUE IS NULL,
--     AND ALSO IF THE NAME IS A FUNCTION CALL DELIVERING NULL.

-- HISTORY:
--     WKB 07/29/81  CREATED ORIGINAL TEST.
--     SPS 10/26/82
--     JET 01/05/88  UPDATED HEADER FORMAT AND ADDED CODE TO PREVENT
--                   OPTIMIZATION.

WITH REPORT;
USE REPORT;
PROCEDURE C41105A IS

BEGIN
     TEST ("C41105A", "CONSTRAINT_ERROR FROM NAMES DENOTING A NULL " &
                      "ACCESS OBJECT AND A FUNCTION CALL DELIVERING " &
                      "NULL");

     DECLARE

          TYPE T1 IS ARRAY (1..2) OF INTEGER;
          TYPE A1 IS ACCESS T1;
          B : A1 := NEW T1' (1,2);
          I : INTEGER;

     BEGIN

          IF EQUAL (3,3) THEN
               B := NULL;
          END IF;

          I := B(1);
          FAILED ("CONSTRAINT_ERROR NOT RAISED - 1");

          IF EQUAL (I,I) THEN
               COMMENT ("NO EXCEPTION RAISED");
          END IF;

     EXCEPTION

          WHEN CONSTRAINT_ERROR => NULL;
          WHEN OTHERS           => FAILED ("WRONG EXCEPTION - 1");

     END;


     DECLARE

          TYPE T2 IS ARRAY (1..2) OF INTEGER;
          TYPE A2 IS ACCESS T2;
          I : INTEGER;

          FUNCTION F RETURN A2 IS
          BEGIN
               IF EQUAL (3,3) THEN
                    RETURN NULL;
               END IF;
               RETURN NEW T2' (1,2);
          END F;

     BEGIN

          I := F(1);
          FAILED ("CONSTRAINT_ERROR NOT RAISED - 2");

          IF EQUAL (I,I) THEN
               COMMENT ("NO EXCEPTION RAISED");
          END IF;

     EXCEPTION

          WHEN CONSTRAINT_ERROR => NULL;
          WHEN OTHERS           => FAILED ("WRONG EXCEPTION - 2");

     END;

     RESULT;
END C41105A;