-- CA11021.A
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-- CA11021.A
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--
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--
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-- Grant of Unlimited Rights
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-- Grant of Unlimited Rights
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--
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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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-- 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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-- 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 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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-- 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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-- 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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-- 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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-- 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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-- 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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-- any manner and for any purpose whatsoever, and to have or permit others
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-- to do so.
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-- to do so.
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--
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--
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-- DISCLAIMER
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-- DISCLAIMER
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--
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--
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-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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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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-- 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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-- 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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-- 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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-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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-- PARTICULAR PURPOSE OF SAID MATERIAL.
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-- PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--*
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--
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--
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-- OBJECTIVE:
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-- OBJECTIVE:
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-- Check that body of the generic parent package can depend on one of
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-- Check that body of the generic parent package can depend on one of
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-- its own private generic children.
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-- its own private generic children.
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--
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--
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-- TEST DESCRIPTION:
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-- TEST DESCRIPTION:
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-- A scenario is created that demonstrates the potential of adding a
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-- A scenario is created that demonstrates the potential of adding a
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-- public generic child during code maintenance without distubing a large
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-- public generic child during code maintenance without distubing a large
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-- subsystem. After child is added to the subsystem, a maintainer
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-- subsystem. After child is added to the subsystem, a maintainer
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-- decides to take advantage of the new functionality and rewrites
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-- decides to take advantage of the new functionality and rewrites
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-- the parent's body.
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-- the parent's body.
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--
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--
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-- Declare a generic package which declares high level operations for a
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-- Declare a generic package which declares high level operations for a
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-- complex number abstraction. Declare a private generic child package
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-- complex number abstraction. Declare a private generic child package
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-- of this package which defines low level complex operations. In the
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-- of this package which defines low level complex operations. In the
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-- parent body, instantiate the private child. Use the low level
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-- parent body, instantiate the private child. Use the low level
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-- operation to complete the high level operation.
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-- operation to complete the high level operation.
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--
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--
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-- In the main program, instantiate the parent generic package.
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-- In the main program, instantiate the parent generic package.
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-- Check that the operations in both packages perform as expected.
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-- Check that the operations in both packages perform as expected.
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--
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--
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--
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--
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-- CHANGE HISTORY:
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-- CHANGE HISTORY:
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-- 06 Dec 94 SAIC ACVC 2.0
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-- 06 Dec 94 SAIC ACVC 2.0
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--
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--
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--!
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--!
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generic -- Complex number abstraction.
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generic -- Complex number abstraction.
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type Int_Type is range <>;
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type Int_Type is range <>;
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package CA11021_0 is
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package CA11021_0 is
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-- Simulate a generic complex number support package. Complex numbers
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-- Simulate a generic complex number support package. Complex numbers
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-- are treated as coordinates in the Cartesian plane.
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-- are treated as coordinates in the Cartesian plane.
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type Complex_Type is private;
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type Complex_Type is private;
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Zero : constant Complex_Type; -- Real number (0,0).
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Zero : constant Complex_Type; -- Real number (0,0).
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function Real_Part (Complex_No : Complex_Type)
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function Real_Part (Complex_No : Complex_Type)
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return Int_Type;
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return Int_Type;
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function Imag_Part (Complex_No : Complex_Type)
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function Imag_Part (Complex_No : Complex_Type)
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return Int_Type;
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return Int_Type;
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function Complex (Real, Imag : Int_Type)
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function Complex (Real, Imag : Int_Type)
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return Complex_Type;
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return Complex_Type;
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-- High level operation for complex number.
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-- High level operation for complex number.
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function "*" (Factor : Int_Type;
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function "*" (Factor : Int_Type;
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C : Complex_Type) return Complex_Type;
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C : Complex_Type) return Complex_Type;
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-- ... and other complicated ones.
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-- ... and other complicated ones.
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private
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private
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type Complex_Type is record
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type Complex_Type is record
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Real : Int_Type;
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Real : Int_Type;
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Imag : Int_Type;
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Imag : Int_Type;
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end record;
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end record;
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Zero : constant Complex_Type := (Real => 0, Imag => 0);
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Zero : constant Complex_Type := (Real => 0, Imag => 0);
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end CA11021_0;
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end CA11021_0;
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--==================================================================--
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--==================================================================--
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-- Private generic child of Complex_Number.
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-- Private generic child of Complex_Number.
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private
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private
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generic
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generic
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-- No parameter.
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-- No parameter.
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package CA11021_0.CA11021_1 is
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package CA11021_0.CA11021_1 is
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-- ... Other declarations.
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-- ... Other declarations.
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-- Low level operation on complex number.
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-- Low level operation on complex number.
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function "+" (Left, Right : Complex_Type)
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function "+" (Left, Right : Complex_Type)
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return Complex_Type;
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return Complex_Type;
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function "-" (Right : Complex_Type)
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function "-" (Right : Complex_Type)
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return Complex_Type;
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return Complex_Type;
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-- ... Various other operations in real application.
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-- ... Various other operations in real application.
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end CA11021_0.CA11021_1;
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end CA11021_0.CA11021_1;
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--==================================================================--
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--==================================================================--
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package body CA11021_0.CA11021_1 is
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package body CA11021_0.CA11021_1 is
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function "+" (Left, Right : Complex_Type)
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function "+" (Left, Right : Complex_Type)
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return Complex_Type is
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return Complex_Type is
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begin
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begin
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return ( (Left.Real + Right.Real, Left.Imag + Right.Imag) );
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return ( (Left.Real + Right.Real, Left.Imag + Right.Imag) );
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end "+";
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end "+";
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--------------------------------------------------
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--------------------------------------------------
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function "-" (Right : Complex_Type) return Complex_Type is
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function "-" (Right : Complex_Type) return Complex_Type is
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begin
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begin
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return (-Right.Real, -Right.Imag);
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return (-Right.Real, -Right.Imag);
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end "-";
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end "-";
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end CA11021_0.CA11021_1;
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end CA11021_0.CA11021_1;
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--==================================================================--
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--==================================================================--
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with CA11021_0.CA11021_1; -- Private generic child package.
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with CA11021_0.CA11021_1; -- Private generic child package.
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package body CA11021_0 is
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package body CA11021_0 is
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-----------------------------------------------------
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-----------------------------------------------------
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-- Parent's body depends on private generic child. --
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-- Parent's body depends on private generic child. --
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-----------------------------------------------------
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-----------------------------------------------------
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-- Instantiate the private child.
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-- Instantiate the private child.
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package Complex_Ops is new CA11021_1;
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package Complex_Ops is new CA11021_1;
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use Complex_Ops; -- All user-defined operators
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use Complex_Ops; -- All user-defined operators
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-- directly visible.
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-- directly visible.
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--------------------------------------------------
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--------------------------------------------------
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function "*" (Factor : Int_Type;
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function "*" (Factor : Int_Type;
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C : Complex_Type) return Complex_Type is
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C : Complex_Type) return Complex_Type is
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Result : Complex_Type := Zero;
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Result : Complex_Type := Zero;
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begin
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begin
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for I in 1 .. abs (Factor) loop
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for I in 1 .. abs (Factor) loop
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Result := Result + C; -- Private generic child "+".
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Result := Result + C; -- Private generic child "+".
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end loop;
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end loop;
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if Factor < 0 then
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if Factor < 0 then
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Result := - Result; -- Private generic child "-".
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Result := - Result; -- Private generic child "-".
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end if;
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end if;
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return Result;
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return Result;
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end "*";
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end "*";
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--------------------------------------------------
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--------------------------------------------------
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function Real_Part (Complex_No : Complex_Type) return Int_Type is
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function Real_Part (Complex_No : Complex_Type) return Int_Type is
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begin
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begin
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return (Complex_No.Real);
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return (Complex_No.Real);
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end Real_Part;
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end Real_Part;
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--------------------------------------------------
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--------------------------------------------------
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function Imag_Part (Complex_No : Complex_Type) return Int_Type is
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function Imag_Part (Complex_No : Complex_Type) return Int_Type is
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begin
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begin
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return (Complex_No.Imag);
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return (Complex_No.Imag);
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end Imag_Part;
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end Imag_Part;
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--------------------------------------------------
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--------------------------------------------------
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function Complex (Real, Imag : Int_Type) return Complex_Type is
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function Complex (Real, Imag : Int_Type) return Complex_Type is
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begin
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begin
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return (Real, Imag);
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return (Real, Imag);
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end Complex;
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end Complex;
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end CA11021_0;
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end CA11021_0;
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--==================================================================--
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--==================================================================--
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with CA11021_0; -- Complex number abstraction.
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with CA11021_0; -- Complex number abstraction.
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with Report;
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with Report;
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procedure CA11021 is
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procedure CA11021 is
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type My_Integer is range -100 .. 100;
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type My_Integer is range -100 .. 100;
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--------------------------------------------------
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--------------------------------------------------
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-- Declare instance of the generic complex package for one particular
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-- Declare instance of the generic complex package for one particular
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-- integer type.
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-- integer type.
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package My_Complex_Pkg is new
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package My_Complex_Pkg is new
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CA11021_0 (Int_Type => My_Integer);
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CA11021_0 (Int_Type => My_Integer);
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use My_Complex_Pkg; -- All user-defined operators
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use My_Complex_Pkg; -- All user-defined operators
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-- directly visible.
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-- directly visible.
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--------------------------------------------------
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--------------------------------------------------
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Complex_One, Complex_Two : Complex_Type;
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Complex_One, Complex_Two : Complex_Type;
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My_Literal : My_Integer := -3;
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My_Literal : My_Integer := -3;
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begin
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begin
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Report.Test ("CA11021", "Check that body of the generic parent package " &
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Report.Test ("CA11021", "Check that body of the generic parent package " &
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"can depend on its private generic child");
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"can depend on its private generic child");
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Complex_One := Complex (11, 6);
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Complex_One := Complex (11, 6);
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Complex_Two := 5 * Complex_One;
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Complex_Two := 5 * Complex_One;
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if Real_Part (Complex_Two) /= 55
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if Real_Part (Complex_Two) /= 55
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and Imag_Part (Complex_Two) /= 30
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and Imag_Part (Complex_Two) /= 30
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then
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then
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Report.Failed ("Incorrect results from complex operation");
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Report.Failed ("Incorrect results from complex operation");
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end if;
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end if;
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Complex_One := Complex (-4, 7);
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Complex_One := Complex (-4, 7);
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Complex_Two := My_Literal * Complex_One;
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Complex_Two := My_Literal * Complex_One;
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if Real_Part (Complex_Two) /= 12
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if Real_Part (Complex_Two) /= 12
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and Imag_Part (Complex_Two) /= -21
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and Imag_Part (Complex_Two) /= -21
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then
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then
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Report.Failed ("Incorrect results from complex operation");
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Report.Failed ("Incorrect results from complex operation");
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end if;
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end if;
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Report.Result;
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Report.Result;
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end CA11021;
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end CA11021;
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