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+-- CC3019C1.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.
+--*
+-- THIS IS GENERIC PACKAGE WHICH IS USED TO CHECK THE LEVEL OF
+-- NESTED GENERICS SUPPORTED BY AN IMPLEMENTATION. IT IS USED
+-- BY MAIN PROCEDURE CC3019C2M.ADA.
+--
+-- HISTORY:
+-- EDWARD V. BERARD, 31 AUGUST 1990
+
+WITH CC3019C0_LIST_CLASS ;
+
+GENERIC
+
+ TYPE ELEMENT IS LIMITED PRIVATE ;
+
+ WITH PROCEDURE ASSIGN (SOURCE : IN OUT ELEMENT ;
+ DESTINATION : IN OUT ELEMENT) ;
+
+ WITH FUNCTION "=" (LEFT : IN ELEMENT ;
+ RIGHT : IN ELEMENT) RETURN BOOLEAN ;
+
+PACKAGE CC3019C1_NESTED_GENERICS IS
+
+ TYPE NESTED_GENERICS_TYPE IS LIMITED PRIVATE ;
+
+ PROCEDURE COPY (SOURCE : IN OUT NESTED_GENERICS_TYPE ;
+ DESTINATION : IN OUT NESTED_GENERICS_TYPE) ;
+
+ PROCEDURE SET_ELEMENT
+ (FOR_THIS_NGT_OBJECT : IN OUT NESTED_GENERICS_TYPE ;
+ TO_THIS_ELEMENT : IN OUT ELEMENT) ;
+
+ PROCEDURE SET_NUMBER
+ (FOR_THIS_NGT_OBJECT : IN OUT NESTED_GENERICS_TYPE ;
+ TO_THIS_NUMBER : IN NATURAL) ;
+
+ FUNCTION "=" (LEFT : IN NESTED_GENERICS_TYPE ;
+ RIGHT : IN NESTED_GENERICS_TYPE) RETURN BOOLEAN ;
+
+ FUNCTION ELEMENT_OF (THIS_NGT_OBJECT : IN NESTED_GENERICS_TYPE)
+ RETURN ELEMENT ;
+
+ FUNCTION NUMBER_OF (THIS_NGT_OBJECT : IN NESTED_GENERICS_TYPE)
+ RETURN NATURAL ;
+
+ GENERIC
+
+ TYPE ELEMENT IS LIMITED PRIVATE ;
+
+ WITH PROCEDURE ASSIGN (SOURCE : IN OUT ELEMENT ;
+ DESTINATION : IN OUT ELEMENT) ;
+
+ PACKAGE GENERIC_TASK IS
+
+ TASK TYPE PROTECTED_AREA IS
+
+ ENTRY STORE (ITEM : IN OUT ELEMENT) ;
+ ENTRY GET (ITEM : IN OUT ELEMENT) ;
+
+ END PROTECTED_AREA ;
+
+ END GENERIC_TASK ;
+
+ GENERIC
+
+ TYPE ELEMENT IS LIMITED PRIVATE ;
+
+ WITH PROCEDURE ASSIGN (SOURCE : IN OUT ELEMENT ;
+ DESTINATION : IN OUT ELEMENT) ;
+
+ WITH FUNCTION "=" (LEFT : IN ELEMENT ;
+ RIGHT : IN ELEMENT) RETURN BOOLEAN ;
+
+ PACKAGE STACK_CLASS IS
+
+ TYPE STACK IS LIMITED PRIVATE ;
+
+ OVERFLOW : EXCEPTION ;
+ UNDERFLOW : EXCEPTION ;
+
+ PROCEDURE PUSH (THIS_ELEMENT : IN OUT ELEMENT ;
+ ON_TO_THIS_STACK : IN OUT STACK) ;
+
+ PROCEDURE POP (THIS_ELEMENT : IN OUT ELEMENT ;
+ OFF_THIS_STACK : IN OUT STACK) ;
+
+ PROCEDURE COPY (THIS_STACK : IN OUT STACK ;
+ TO_THIS_STACK : IN OUT STACK) ;
+
+ PROCEDURE CLEAR (THIS_STACK : IN OUT STACK) ;
+
+ GENERIC
+
+ WITH PROCEDURE PROCESS (THIS_ELEMENT : IN ELEMENT ;
+ CONTINUE : OUT BOOLEAN) ;
+
+ PROCEDURE ITERATE (OVER_THIS_STACK : IN STACK) ;
+
+ FUNCTION NUMBER_OF_ELEMENTS (ON_THIS_STACK : IN STACK)
+ RETURN NATURAL ;
+
+ FUNCTION "=" (LEFT : IN STACK ;
+ RIGHT : IN STACK) RETURN BOOLEAN ;
+
+ PRIVATE
+
+ PACKAGE NEW_LIST_CLASS IS NEW
+ CC3019C0_LIST_CLASS (ELEMENT => ELEMENT,
+ ASSIGN => ASSIGN,
+ "=" => "=") ;
+
+ TYPE STACK IS NEW NEW_LIST_CLASS.LIST ;
+
+ END STACK_CLASS ;
+
+PRIVATE
+
+ TYPE NESTED_GENERICS_TYPE IS RECORD
+ FIRST : ELEMENT ;
+ SECOND : NATURAL ;
+ END RECORD ;
+
+END CC3019C1_NESTED_GENERICS ;
+
+PACKAGE BODY CC3019C1_NESTED_GENERICS IS
+
+ PROCEDURE COPY (SOURCE : IN OUT NESTED_GENERICS_TYPE ;
+ DESTINATION : IN OUT NESTED_GENERICS_TYPE) IS
+
+ BEGIN -- COPY
+
+ ASSIGN (SOURCE => SOURCE.FIRST,
+ DESTINATION => DESTINATION.FIRST) ;
+
+ DESTINATION.SECOND := SOURCE.SECOND ;
+
+ END COPY ;
+
+ PROCEDURE SET_ELEMENT
+ (FOR_THIS_NGT_OBJECT : IN OUT NESTED_GENERICS_TYPE ;
+ TO_THIS_ELEMENT : IN OUT ELEMENT) IS
+
+ BEGIN -- SET_ELEMENT
+
+ ASSIGN (SOURCE => TO_THIS_ELEMENT,
+ DESTINATION => FOR_THIS_NGT_OBJECT.FIRST) ;
+
+ END SET_ELEMENT ;
+
+ PROCEDURE SET_NUMBER
+ (FOR_THIS_NGT_OBJECT : IN OUT NESTED_GENERICS_TYPE ;
+ TO_THIS_NUMBER : IN NATURAL) IS
+
+ BEGIN -- SET_NUMBER
+
+ FOR_THIS_NGT_OBJECT.SECOND := TO_THIS_NUMBER ;
+
+ END SET_NUMBER ;
+
+ FUNCTION "=" (LEFT : IN NESTED_GENERICS_TYPE ;
+ RIGHT : IN NESTED_GENERICS_TYPE) RETURN BOOLEAN IS
+
+ BEGIN -- "="
+
+ IF (LEFT.FIRST = RIGHT.FIRST) AND
+ (LEFT.SECOND = RIGHT.SECOND) THEN
+ RETURN TRUE ;
+ ELSE
+ RETURN FALSE ;
+ END IF ;
+
+ END "=" ;
+
+ FUNCTION ELEMENT_OF (THIS_NGT_OBJECT : IN NESTED_GENERICS_TYPE)
+ RETURN ELEMENT IS
+
+ BEGIN -- ELEMENT_OF
+
+ RETURN THIS_NGT_OBJECT.FIRST ;
+
+ END ELEMENT_OF ;
+
+ FUNCTION NUMBER_OF (THIS_NGT_OBJECT : IN NESTED_GENERICS_TYPE)
+ RETURN NATURAL IS
+
+ BEGIN -- NUMBER_OF
+
+ RETURN THIS_NGT_OBJECT.SECOND ;
+
+ END NUMBER_OF ;
+
+ PACKAGE BODY GENERIC_TASK IS
+
+ TASK BODY PROTECTED_AREA IS
+
+ LOCAL_STORE : ELEMENT ;
+
+ BEGIN -- PROTECTED_AREA
+
+ LOOP
+ SELECT
+ ACCEPT STORE (ITEM : IN OUT ELEMENT) DO
+ ASSIGN (SOURCE => ITEM,
+ DESTINATION => LOCAL_STORE) ;
+ END STORE ;
+ OR
+ ACCEPT GET (ITEM : IN OUT ELEMENT) DO
+ ASSIGN (SOURCE => LOCAL_STORE,
+ DESTINATION => ITEM) ;
+ END GET ;
+ OR
+ TERMINATE ;
+ END SELECT ;
+ END LOOP ;
+
+ END PROTECTED_AREA ;
+
+ END GENERIC_TASK ;
+
+ PACKAGE BODY STACK_CLASS IS
+
+ PROCEDURE PUSH (THIS_ELEMENT : IN OUT ELEMENT ;
+ ON_TO_THIS_STACK : IN OUT STACK) IS
+
+ BEGIN -- PUSH
+
+ NEW_LIST_CLASS.ADD (
+ THIS_ELEMENT => THIS_ELEMENT,
+ TO_THIS_LIST =>
+ NEW_LIST_CLASS.LIST (ON_TO_THIS_STACK)) ;
+
+ EXCEPTION
+
+ WHEN NEW_LIST_CLASS.OVERFLOW => RAISE OVERFLOW ;
+
+ END PUSH ;
+
+ PROCEDURE POP (THIS_ELEMENT : IN OUT ELEMENT ;
+ OFF_THIS_STACK : IN OUT STACK) IS
+
+ BEGIN -- POP
+
+ NEW_LIST_CLASS.DELETE (
+ THIS_ELEMENT => THIS_ELEMENT,
+ FROM_THIS_LIST =>
+ NEW_LIST_CLASS.LIST (OFF_THIS_STACK)) ;
+
+ EXCEPTION
+
+ WHEN NEW_LIST_CLASS.UNDERFLOW => RAISE UNDERFLOW ;
+
+ END POP ;
+
+ PROCEDURE COPY (THIS_STACK : IN OUT STACK ;
+ TO_THIS_STACK : IN OUT STACK) IS
+
+ BEGIN -- COPY
+
+ NEW_LIST_CLASS.COPY (
+ THIS_LIST => NEW_LIST_CLASS.LIST (THIS_STACK),
+ TO_THIS_LIST =>
+ NEW_LIST_CLASS.LIST (TO_THIS_STACK)) ;
+
+ END COPY ;
+
+ PROCEDURE CLEAR (THIS_STACK : IN OUT STACK) IS
+
+ BEGIN -- CLEAR
+
+ NEW_LIST_CLASS.CLEAR (NEW_LIST_CLASS.LIST (THIS_STACK)) ;
+
+ END CLEAR ;
+
+ PROCEDURE ITERATE (OVER_THIS_STACK : IN STACK) IS
+
+ PROCEDURE STACK_ITERATE IS NEW NEW_LIST_CLASS.ITERATE
+ (PROCESS => PROCESS) ;
+
+ BEGIN -- ITERATE
+
+ STACK_ITERATE (NEW_LIST_CLASS.LIST (OVER_THIS_STACK)) ;
+
+ END ITERATE ;
+
+ FUNCTION NUMBER_OF_ELEMENTS (ON_THIS_STACK : IN STACK)
+ RETURN NATURAL IS
+
+ BEGIN -- NUMBER_OF_ELEMENTS
+
+ RETURN NEW_LIST_CLASS.NUMBER_OF_ELEMENTS
+ (IN_THIS_LIST =>
+ NEW_LIST_CLASS.LIST (ON_THIS_STACK)) ;
+
+ END NUMBER_OF_ELEMENTS ;
+
+ FUNCTION "=" (LEFT : IN STACK ;
+ RIGHT : IN STACK) RETURN BOOLEAN IS
+
+ BEGIN -- "="
+
+ RETURN NEW_LIST_CLASS."=" (
+ LEFT => NEW_LIST_CLASS.LIST (LEFT),
+ RIGHT => NEW_LIST_CLASS.LIST (RIGHT)) ;
+
+ END "=" ;
+
+ END STACK_CLASS ;
+
+END CC3019C1_NESTED_GENERICS ;
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