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+-- C64005B.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 THAT A SUBPROGRAM CAN BE CALLED RECURSIVELY AND THAT NON-LOCAL
+-- VARIABLES AND CONSTANTS ARE PROPERLY ACCESSED FROM WITHIN RECURSIVE
+-- INVOCATIONS.
+
+-- CPP 7/2/84
+
+WITH REPORT; USE REPORT;
+PROCEDURE C64005B IS
+
+ COUNT : INTEGER := 0;
+ TWENTY : CONSTANT INTEGER := 20;
+ C1 : CONSTANT INTEGER := 1;
+ G1, G2, G3 : INTEGER := 0;
+ G4, G5 : INTEGER := 0;
+
+ PROCEDURE R (A1 : INTEGER; A2 : IN OUT INTEGER; A3 : OUT INTEGER)
+ IS
+ C1 : CONSTANT INTEGER := 5;
+ TEN : CONSTANT INTEGER := 10;
+ J1, J2 : INTEGER := 1;
+ J3 : INTEGER := 0;
+
+ PROCEDURE RECURSE (P1 : INTEGER; P2 : IN OUT INTEGER) IS
+ C1 : INTEGER := 2;
+ BEGIN -- RECURSE
+ C1 := IDENT_INT (10);
+ IF P1 < TWENTY THEN
+ RECURSE (P1 + C1, G2);
+ G1 := G1 + C64005B.C1;
+ G3 := G3 + P1;
+ P2 := P2 + IDENT_INT(2);
+ A2 := A2 + IDENT_INT(1);
+ J2 := J2 + R.C1;
+ END IF;
+ END RECURSE;
+
+ BEGIN -- R
+ IF A2 < TEN THEN
+ A2 := A2 + C1;
+ RECURSE (0, J1);
+ J3 := J3 + TEN;
+ COUNT := COUNT + 1;
+ COMMENT ("ON PASS # " & INTEGER'IMAGE(COUNT));
+ COMMENT ("VALUE OF A2 IS " & INTEGER'IMAGE(A2));
+ COMMENT ("VALUE OF J3 IS " & INTEGER'IMAGE(J3));
+ R (0, A2, J3);
+ J3 := J3 + A2;
+ END IF;
+ A3 := J1 + J3;
+ END R;
+
+BEGIN
+ TEST("C64005B", "RECURSIVE SUBPROGRAMS WITH ALL KINDS " &
+ "OF DATA ACCESS");
+
+ R (0, G4, G5);
+
+ IF (COUNT /= 2) OR (G1 /= 4) OR
+ (G2 /= 4) OR (G3 /= 20) OR
+ (G4 /= 14) OR (G5 /= 35) THEN
+ FAILED ("RECURSIVE INVOCATIONS' DATA ACCESS IS NOT" &
+ " WORKING CORRECTLY");
+ END IF;
+
+ COMMENT ("VALUE OF COUNT IS " & INTEGER'IMAGE(COUNT));
+ COMMENT ("VALUE OF G1 IS " & INTEGER'IMAGE(G1));
+ COMMENT ("VALUE OF G2 IS " & INTEGER'IMAGE(G2));
+ COMMENT ("VALUE OF G3 IS " & INTEGER'IMAGE(G3));
+ COMMENT ("VALUE OF G4 IS " & INTEGER'IMAGE(G4));
+ COMMENT ("VALUE OF G5 IS " & INTEGER'IMAGE(G5));
+
+ RESULT;
+
+EXCEPTION
+ WHEN PROGRAM_ERROR =>
+ FAILED ("PROGRAM_ERROR RAISED");
+ COMMENT ("VALUE OF COUNT IS " & INTEGER'IMAGE(COUNT));
+ COMMENT ("VALUE OF G1 IS " & INTEGER'IMAGE(G1));
+ COMMENT ("VALUE OF G2 IS " & INTEGER'IMAGE(G2));
+ COMMENT ("VALUE OF G3 IS " & INTEGER'IMAGE(G3));
+ COMMENT ("VALUE OF G4 IS " & INTEGER'IMAGE(G4));
+ COMMENT ("VALUE OF G5 IS " & INTEGER'IMAGE(G5));
+ RESULT;
+
+END C64005B;