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+-- C392003.A
+--
+-- 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 the use of a class-wide formal parameter allows for the
+-- proper dispatching of objects to the appropriate implementation of
+-- a primitive operation. Check this where the root tagged type is
+-- defined in a package, and the extended type is defined in a nested
+-- package.
+--
+-- TEST DESCRIPTION:
+-- Declare a root tagged type, and some associated primitive operations.
+-- Extend the root type, and override one or more primitive operations,
+-- inheriting the other primitive operations from the root type.
+-- Derive from the extended type, again overriding some primitive
+-- operations and inheriting others (including some that the parent
+-- inherited).
+-- Define a subprogram with a class-wide parameter, inside of which is a
+-- call on a dispatching primitive operation. These primitive operations
+-- modify global variables (the class-wide parameter has mode IN).
+--
+--
+--
+-- The following hierarchy of tagged types and primitive operations is
+-- utilized in this test:
+--
+-- type Bank_Account (root)
+-- |
+-- | Operations
+-- | Increment_Bank_Reserve
+-- | Assign_Representative
+-- | Increment_Counters
+-- | Open
+-- |
+-- type Savings_Account (extended from Bank_Account)
+-- |
+-- | Operations
+-- | (Increment_Bank_Reserve) (inherited)
+-- | Assign_Representative (overridden)
+-- | Increment_Counters (overridden)
+-- | Open (overridden)
+-- |
+-- type Preferred_Account (extended from Savings_Account)
+-- |
+-- | Operations
+-- | (Increment_Bank_Reserve) (inherited twice - Bank_Acct.)
+-- | (Assign_Representative) (inherited - Savings_Acct.)
+-- | Increment_Counters (overridden)
+-- | Open (overridden)
+--
+--
+-- In this test, we are concerned with the following selection of dispatching
+-- calls, accomplished with the use of a Bank_Account'Class IN procedure
+-- parameter :
+--
+-- \ Type
+-- Prim. Op \ Bank_Account Savings_Account Preferred_Account
+-- \------------------------------------------------
+-- Increment_Bank_Reserve| X X
+-- Assign_Representative | X
+-- Increment_Counters | X X X
+--
+--
+--
+-- The location of the declaration and derivation of the root and extended
+-- types will be varied over a series of tests. Locations of declaration
+-- and derivation for a particular test are marked with an asterisk (*).
+--
+-- Root type:
+--
+-- * Declared in package.
+-- Declared in generic package.
+--
+-- Extended types:
+--
+-- Derived in parent location.
+-- * Derived in a nested package.
+-- Derived in a nested subprogram.
+-- Derived in a nested generic package.
+-- Derived in a separate package.
+-- Derived in a separate visible child package.
+-- Derived in a separate private child package.
+--
+-- Primitive Operations:
+--
+-- * Procedures with same parameter profile.
+-- Procedures with different parameter profile.
+-- * Functions with same parameter profile.
+-- Functions with different parameter profile.
+-- * Mixture of Procedures and Functions.
+--
+--
+-- CHANGE HISTORY:
+-- 06 Dec 94 SAIC ACVC 2.0
+--
+--!
+
+
+ with Report;
+
+ procedure C392003 is
+
+ --
+ -- Types and subtypes.
+ --
+
+ type Dollar_Amount is new float;
+ type Interest_Rate is delta 0.001 range 0.000 .. 1.000;
+ type Account_Types is (Bank, Savings, Preferred, Total);
+ type Account_Counter is array (Account_Types) of integer;
+ type Account_Rep is (President, Manager, New_Account_Manager, Teller);
+
+ --
+ -- Constants.
+ --
+
+ Opening_Balance : constant Dollar_Amount := 100.00;
+ Current_Rate : constant Interest_Rate := 0.030;
+ Preferred_Minimum_Balance : constant Dollar_Amount := 1000.00;
+
+ --
+ -- Global Variables
+ --
+
+ Bank_Reserve : Dollar_Amount := 0.00;
+ Daily_Representative : Account_Rep := New_Account_Manager;
+ Number_Of_Accounts : Account_Counter := (Bank => 0,
+ Savings => 0,
+ Preferred => 0,
+ Total => 0);
+
+ -- Root tagged type and primitive operations declared in internal
+ -- package (Accounts).
+ -- Extended types (and primitive operations) derived in nested packages.
+
+ --=================================================================--
+
+ package Accounts is
+
+ --
+ -- Root account type and primitive operations.
+ --
+
+ -- Root type.
+
+ type Bank_Account is tagged
+ record
+ Balance : Dollar_Amount;
+ end record;
+
+ -- Primitive operations of Bank_Account.
+
+ function Increment_Bank_Reserve (Acct : in Bank_Account)
+ return Dollar_Amount;
+ function Assign_Representative (Acct : in Bank_Account)
+ return Account_Rep;
+ procedure Increment_Counters (Acct : in Bank_Account);
+ procedure Open (Acct : in out Bank_Account);
+
+ --=================================================================--
+
+ package S_And_L is
+
+ -- Declare extended type in a nested package.
+
+ type Savings_Account is new Bank_Account with
+ record
+ Rate : Interest_Rate;
+ end record;
+
+ -- Function Increment_Bank_Reserve inherited from
+ -- parent (Bank_Account).
+
+ -- Primitive operations (Overridden).
+ function Assign_Representative (Acct : in Savings_Account)
+ return Account_Rep;
+ procedure Increment_Counters (Acct : in Savings_Account);
+ procedure Open (Acct : in out Savings_Account);
+
+
+ --=================================================================--
+
+ package Premium is
+
+ -- Declare further extended type in a nested package.
+
+ type Preferred_Account is new Savings_Account with
+ record
+ Minimum_Balance : Dollar_Amount;
+ end record;
+
+ -- Function Increment_Bank_Reserve inherited twice.
+ -- Function Assign_Representative inherited from parent
+ -- (Savings_Account).
+
+ -- Primitive operation (Overridden).
+ procedure Increment_Counters (Acct : in Preferred_Account);
+ procedure Open (Acct : in out Preferred_Account);
+
+ -- Function used to verify Open operation for Preferred_Account
+ -- objects.
+ function Verify_Open (Acct : in Preferred_Account) return Boolean;
+
+ end Premium;
+
+ end S_And_L;
+
+ end Accounts;
+
+ --=================================================================--
+
+ package body Accounts is
+
+ --
+ -- Primitive operations for Bank_Account.
+ --
+
+ function Increment_Bank_Reserve (Acct : in Bank_Account)
+ return Dollar_Amount is
+ begin
+ return (Bank_Reserve + Acct.Balance);
+ end Increment_Bank_Reserve;
+
+ function Assign_Representative (Acct : in Bank_Account)
+ return Account_Rep is
+ begin
+ return Account_Rep'(Teller);
+ end Assign_Representative;
+
+ procedure Increment_Counters (Acct : in Bank_Account) is
+ begin
+ Number_Of_Accounts (Bank) := Number_Of_Accounts (Bank) + 1;
+ Number_Of_Accounts (Total) := Number_Of_Accounts (Total) + 1;
+ end Increment_Counters;
+
+ procedure Open (Acct : in out Bank_Account) is
+ begin
+ Acct.Balance := Opening_Balance;
+ end Open;
+
+ --=================================================================--
+
+ package body S_And_L is
+
+ --
+ -- Overridden operations for Savings_Account type.
+ --
+
+ function Assign_Representative (Acct : in Savings_Account)
+ return Account_Rep is
+ begin
+ return (Manager);
+ end Assign_Representative;
+
+ procedure Increment_Counters (Acct : in Savings_Account) is
+ begin
+ Number_Of_Accounts (Savings) := Number_Of_Accounts (Savings) + 1;
+ Number_Of_Accounts (Total) := Number_Of_Accounts (Total) + 1;
+ end Increment_Counters;
+
+ procedure Open (Acct : in out Savings_Account) is
+ begin
+ Open (Bank_Account(Acct));
+ Acct.Rate := Current_Rate;
+ Acct.Balance := 2.0 * Opening_Balance;
+ end Open;
+
+ --=================================================================--
+
+ package body Premium is
+
+ --
+ -- Overridden operations for Preferred_Account type.
+ --
+
+ procedure Increment_Counters (Acct : in Preferred_Account) is
+ begin
+ Number_Of_Accounts (Preferred) :=
+ Number_Of_Accounts (Preferred) + 1;
+ Number_Of_Accounts (Total) :=
+ Number_Of_Accounts (Total) + 1;
+ end Increment_Counters;
+
+ procedure Open (Acct : in out Preferred_Account) is
+ begin
+ Open (Savings_Account(Acct));
+ Acct.Minimum_Balance := Preferred_Minimum_Balance;
+ Acct.Balance := Acct.Minimum_Balance;
+ end Open;
+
+ --
+ -- Function used to verify Open operation for Preferred_Account
+ -- objects.
+ --
+
+ function Verify_Open (Acct : in Preferred_Account)
+ return Boolean is
+ begin
+ return (Acct.Balance = Preferred_Minimum_Balance and
+ Acct.Rate = Current_Rate and
+ Acct.Minimum_Balance = Preferred_Minimum_Balance);
+ end Verify_Open;
+
+ end Premium;
+
+ end S_And_L;
+
+ end Accounts;
+
+ --=================================================================--
+
+ -- Declare account objects.
+
+ B_Account : Accounts.Bank_Account;
+ S_Account : Accounts.S_And_L.Savings_Account;
+ P_Account : Accounts.S_And_L.Premium.Preferred_Account;
+
+ -- Procedures to operate on accounts.
+ -- Each uses a class-wide IN parameter, as well as a call to a
+ -- dispatching operation.
+
+ -- Function Tabulate_Account performs a dispatching call on a primitive
+ -- operation that has been overridden for each of the extended types.
+
+ procedure Tabulate_Account (Acct : in Accounts.Bank_Account'Class) is
+ begin
+ Accounts.Increment_Counters (Acct); -- Dispatch according to tag.
+ end Tabulate_Account;
+
+ -- Function Accumulate_Reserve performs a dispatching call on a
+ -- primitive operation that has been defined for the root type and
+ -- inherited by each derived type.
+
+ function Accumulate_Reserve (Acct : in Accounts.Bank_Account'Class)
+ return Dollar_Amount is
+ begin
+ -- Dispatch according to tag.
+ return (Accounts.Increment_Bank_Reserve (Acct));
+ end Accumulate_Reserve;
+
+ -- Procedure Resolve_Dispute performs a dispatching call on a primitive
+ -- operation that has been defined in the root type, overridden in the
+ -- first derived extended type, and inherited by the subsequent extended
+ -- type.
+
+ procedure Resolve_Dispute (Acct : in Accounts.Bank_Account'Class) is
+ begin
+ -- Dispatch according to tag.
+ Daily_Representative := Accounts.Assign_Representative (Acct);
+ end Resolve_Dispute;
+
+ --=================================================================--
+
+ begin -- Main test procedure.
+
+ Report.Test ("C392003", "Check that the use of a class-wide parameter " &
+ "allows for proper dispatching where root type " &
+ "is declared in a nested package, and " &
+ "subsequent extended types are derived in " &
+ "further nested packages" );
+
+ Bank_Account_Subtest:
+ begin
+ Accounts.Open (B_Account);
+
+ -- Demonstrate class-wide parameter allowing dispatch by a primitive
+ -- operation that has been defined for this specific type.
+ Bank_Reserve := Accumulate_Reserve (Acct => B_Account);
+ Tabulate_Account (B_Account);
+
+ if (Bank_Reserve /= Opening_Balance) or
+ (Number_Of_Accounts (Bank) /= 1) or
+ (Number_Of_Accounts (Total) /= 1)
+ then
+ Report.Failed ("Failed in Bank_Account_Subtest");
+ end if;
+
+ end Bank_Account_Subtest;
+
+
+ Savings_Account_Subtest:
+ begin
+ Accounts.S_And_L.Open (Acct => S_Account);
+
+ -- Demonstrate class-wide parameter allowing dispatch by a primitive
+ -- operation that has been overridden for this extended type.
+ Resolve_Dispute (Acct => S_Account);
+ Tabulate_Account (S_Account);
+
+ if (Daily_Representative /= Manager) or
+ (Number_Of_Accounts (Savings) /= 1) or
+ (Number_Of_Accounts (Total) /= 2)
+ then
+ Report.Failed ("Failed in Savings_Account_Subtest");
+ end if;
+
+ end Savings_Account_Subtest;
+
+
+
+ Preferred_Account_Subtest:
+ begin
+ Accounts.S_And_L.Premium.Open (P_Account);
+
+ -- Verify that the correct implementation of Open (overridden) was
+ -- used for the Preferred_Account object.
+ if not Accounts.S_And_L.Premium.Verify_Open (P_Account) then
+ Report.Failed ("Incorrect values for init. Preferred Acct object");
+ end if;
+
+ -- Demonstrate class-wide parameter allowing dispatch by a primitive
+ -- operation that has been twice inherited by this extended type.
+ Bank_Reserve := Accumulate_Reserve (Acct => P_Account);
+
+ -- Demonstrate class-wide parameter allowing dispatch by a primitive
+ -- operation that has been overridden for this extended type (the
+ -- operation was overridden by its parent type as well).
+ Tabulate_Account (P_Account);
+
+ if Bank_Reserve /= 1100.00 or
+ Number_Of_Accounts (Preferred) /= 1 or
+ Number_Of_Accounts (Total) /= 3
+ then
+ Report.Failed ("Failed in Preferred_Account_Subtest");
+ end if;
+
+ end Preferred_Account_Subtest;
+
+ Report.Result;
+
+ end C392003;