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jeremybenn |
-- CA11015.A
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--
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-- Grant of Unlimited Rights
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--
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-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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-- unlimited rights in the software and documentation contained herein.
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-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
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-- this public release, the Government intends to confer upon all
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-- recipients unlimited rights equal to those held by the Government.
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-- These rights include rights to use, duplicate, release or disclose the
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-- released technical data and computer software in whole or in part, in
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-- any manner and for any purpose whatsoever, and to have or permit others
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-- to do so.
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--
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-- DISCLAIMER
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--
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-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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-- PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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-- Check that a generic child of a non-generic package can use its
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-- parent's declarations and operations. Check that the instantiation
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-- of the generic child can correctly use the operations.
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--
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-- TEST DESCRIPTION:
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-- Declare a map abstraction in a package which manages basic physical
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-- maps. Declare a generic child of this package which defines copies
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-- of maps of any discrete type, i.e., population, density, or weather.
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--
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-- In the main program, declare an instance of the child. Check that
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-- the operations in the parent and instance of the child package
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-- perform as expected.
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--
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--
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-- CHANGE HISTORY:
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-- 06 Dec 94 SAIC ACVC 2.0
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--
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--!
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-- Simulates map of physical features, i.e., desert, forest, water,
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-- or plains.
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package CA11015_0 is
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type Map_Type is private;
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subtype Latitude is integer range 1 .. 9;
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subtype Longitude is integer range 1 .. 7;
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type Physical_Features is (Desert, Forest, Water, Plains, Unexplored);
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type Page_Type is range 0 .. 80;
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Terra_Incognita : exception;
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-- Use geographic database to initialize the basic map.
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procedure Initialize_Basic_Map (Map : in out Map_Type);
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function Get_Physical_Feature (Lat : Latitude;
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Long : Longitude;
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Map : Map_Type) return Physical_Features;
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function Next_Page return Page_Type;
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private
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type Map_Type is array (Latitude, Longitude) of Physical_Features;
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Basic_Map : Map_Type;
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Page : Page_Type := 0; -- Location for each copy of Map.
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end CA11015_0;
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--==================================================================--
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package body CA11015_0 is
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procedure Initialize_Basic_Map (Map : in out Map_Type) is
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-- Not a real initialization. Real application can use geographic
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-- database to create the basic map.
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begin
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for I in Latitude'first .. Latitude'last loop
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for J in 1 .. 2 loop
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Map (I, J) := Unexplored;
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end loop;
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for J in 3 .. 4 loop
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Map (I, J) := Desert;
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end loop;
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for J in 5 .. 7 loop
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Map (I, J) := Plains;
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end loop;
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end loop;
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end Initialize_Basic_Map;
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---------------------------------------------------
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function Get_Physical_Feature (Lat : Latitude;
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Long : Longitude;
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Map : Map_Type)
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return Physical_Features is
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begin
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return (Map (Lat, Long));
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end Get_Physical_Feature;
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---------------------------------------------------
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function Next_Page return Page_Type is
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begin
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Page := Page + 1;
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return (Page);
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end Next_Page;
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---------------------------------------------------
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begin -- CA11015_0
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-- Initialize a basic map.
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Initialize_Basic_Map (Basic_Map);
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end CA11015_0;
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--==================================================================--
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-- Generic child package of physical map. Instantiate this package to
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-- create map copy with a new geographic feature, i.e., population, density,
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-- or weather.
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generic
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type Generic_Feature is (<>); -- Any geographic feature, i.e., population,
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-- density, or weather that can be
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-- characterized by a scalar value.
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package CA11015_0.CA11015_1 is
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type Feature_Map is private;
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function Get_Feature_Val (Lat : Latitude;
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Long : Longitude;
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Map : Feature_Map) return Generic_Feature;
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procedure Set_Feature_Val (Lat : in Latitude;
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Long : in Longitude;
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Fea : in Generic_Feature;
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Map : in out Feature_Map);
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function Check_Page (Map : Feature_Map;
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Page_No : Page_Type) return boolean;
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private
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type Feature_Type is array (Latitude, Longitude) of Generic_Feature;
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type Feature_Map is
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record
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Feature : Feature_Type;
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Page : Page_Type := Next_Page; -- Operation from parent.
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end record;
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end CA11015_0.CA11015_1;
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--==================================================================--
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package body CA11015_0.CA11015_1 is
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function Get_Feature_Val (Lat : Latitude;
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Long : Longitude;
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Map : Feature_Map) return Generic_Feature is
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begin
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return (Map.Feature (Lat, Long));
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end Get_Feature_Val;
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---------------------------------------------------
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procedure Set_Feature_Val (Lat : in Latitude;
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Long : in Longitude;
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Fea : in Generic_Feature;
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Map : in out Feature_Map) is
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begin
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if Get_Physical_Feature (Lat, Long, Basic_Map) = Unexplored
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-- Parent's operation,
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-- Parent's private object.
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then
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raise Terra_Incognita; -- Exception from parent.
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else
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Map.Feature (Lat, Long) := Fea;
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end if;
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end Set_Feature_Val;
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---------------------------------------------------
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function Check_Page (Map : Feature_Map;
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Page_No : Page_Type) return boolean is
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begin
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return (Map.Page = Page_No);
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end Check_Page;
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end CA11015_0.CA11015_1;
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--==================================================================--
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with CA11015_0.CA11015_1; -- Generic map operation,
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-- implicitly withs parent, basic map
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-- application.
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with Report;
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procedure CA11015 is
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begin
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Report.Test ("CA11015", "Check that an instantiation of a child package " &
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"of a non-generic package can use its parent's " &
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"declarations and operations");
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-- An application creates a population map using an integer type.
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Population_Map_Subtest:
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declare
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type Population_Type is range 0 .. 10_000;
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-- Declare instance of the child generic map package for one
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-- particular integer type.
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package Population is new CA11015_0.CA11015_1 (Population_Type);
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Population_Map_Latitude : CA11015_0.Latitude := 1;
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-- parent's type
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Population_Map_Longitude : CA11015_0.Longitude := 5;
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-- parent's type
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Pop_Map : Population.Feature_Map;
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Pop : Population_Type := 1000;
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begin
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Population.Set_Feature_Val (Population_Map_Latitude,
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Population_Map_Longitude,
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Pop,
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Pop_Map);
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If not ( (Population.Get_Feature_Val (Population_Map_Latitude,
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Population_Map_Longitude, Pop_Map) = Pop) or
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(Population.Check_Page (Pop_Map, 1)) ) then
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Report.Failed ("Population map contains incorrect values");
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end if;
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end Population_Map_Subtest;
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-- An application creates a weather map using an enumeration type.
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Weather_Map_Subtest:
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declare
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type Weather_Type is (Hot, Cold, Mild);
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-- Declare instance of the child generic map package for one
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-- particular enumeration type.
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package Weather_Pkg is new CA11015_0.CA11015_1 (Weather_Type);
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Weather_Map_Latitude : CA11015_0.Latitude := 2;
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-- parent's type
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Weather_Map_Longitude : CA11015_0.Longitude := 6;
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-- parent's type
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Weather_Map : Weather_Pkg.Feature_Map;
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Weather : Weather_Type := Mild;
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begin
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Weather_Pkg.Set_Feature_Val (Weather_Map_Latitude,
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Weather_Map_Longitude,
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Weather,
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Weather_Map);
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if ( (Weather_Pkg.Get_Feature_Val (Weather_Map_Latitude,
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Weather_Map_Longitude, Weather_Map) /= Weather) or
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not (Weather_Pkg.Check_Page (Weather_Map, 2)) )
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then
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Report.Failed ("Weather map contains incorrect values");
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end if;
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end Weather_Map_Subtest;
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-- During processing, the application may erroneously attempts to create
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-- a density map on an unexplored area. This would result in the raising
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-- of an exception.
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Density_Map_Subtest:
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declare
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type Density_Type is (High, Medium, Low);
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-- Declare instance of the child generic map package for one
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-- particular enumeration type.
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package Density_Pkg is new CA11015_0.CA11015_1 (Density_Type);
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Density_Map_Latitude : CA11015_0.Latitude := 7;
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-- parent's type
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Density_Map_Longitude : CA11015_0.Longitude := 2;
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-- parent's type
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Density : Density_Type := Low;
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Density_Map : Density_Pkg.Feature_Map;
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begin
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Density_Pkg.Set_Feature_Val (Density_Map_Latitude,
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Density_Map_Longitude,
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Density,
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Density_Map);
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Report.Failed ("Exception not raised in child generic package");
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exception
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when CA11015_0.Terra_Incognita => -- parent's exception,
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null; -- raised in child.
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when others =>
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Report.Failed ("Others exception is raised");
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end Density_Map_Subtest;
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Report.Result;
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end CA11015;
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