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+-- CA11013.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 a child function of a library level instantiation
+-- of a generic can be the instantiation of a child function of
+-- the generic. Check that the child instance can use its parent's
+-- declarations and operations, including a formal subprogram of the
+-- parent.
+--
+-- TEST DESCRIPTION:
+-- Declare a generic package which simulates a real complex
+-- abstraction. Declare a generic child function of this package
+-- which builds a random complex number. Declare a second
+-- package which defines a random complex number generator. This
+-- package provides actual parameters for the generic parent package.
+--
+-- Instantiate the first generic package, then instantiate the child
+-- generic function as a child unit of the first instance. In the main
+-- program, check that the operations in both instances perform as
+-- expected.
+--
+--
+-- CHANGE HISTORY:
+-- 06 Dec 94 SAIC ACVC 2.0
+-- 16 Nov 95 SAIC Update and repair for ACVC 2.0.1
+-- 19 Oct 96 SAIC ACVC 2.1: Added pragma Elaborate to context
+-- clause of CA11013_3.
+-- 27 Feb 97 CTA.PWB Added elaboration pragma at package CA11013_3
+--!
+
+generic -- Complex number abstraction.
+ type Real_Type is digits <>;
+ with function Random_Generator (Seed : Real_Type) return Real_Type;
+
+package CA11013_0 is
+
+ -- Simulate a generic complex number support package. Complex numbers
+ -- are treated as coordinates in the Cartesian plane.
+
+ type Complex_Type is
+ record
+ Real : Real_Type;
+ Imag : Real_Type;
+ end record;
+
+ function Make (Real, Imag : Real_Type) -- Create a complex
+ return Complex_Type; -- number.
+
+ procedure Components (Complex_No : in Complex_Type;
+ Real_Part, Imag_Part : out Real_Type);
+
+end CA11013_0;
+
+ --==================================================================--
+
+package body CA11013_0 is
+
+ function Make (Real, Imag : Real_Type) return Complex_Type is
+ begin
+ return (Real, Imag);
+ end Make;
+ -------------------------------------------------------------
+ procedure Components (Complex_No : in Complex_Type;
+ Real_Part, Imag_Part : out Real_Type) is
+ begin
+ Real_Part := Complex_No.Real;
+ Imag_Part := Complex_No.Imag;
+ end Components;
+
+end CA11013_0;
+
+ --==================================================================--
+
+-- Generic child of complex number package. This child adds a layer of
+-- functionality to the parent generic.
+
+generic -- Random complex number operation.
+
+function CA11013_0.CA11013_1 (Seed : Real_Type) return Complex_Type;
+
+ --==============================================--
+
+function CA11013_0.CA11013_1 (Seed : Real_Type) return Complex_Type is
+
+ Random_Real_Part : Real_Type := Random_Generator (Seed);
+ -- parent's formal subprogram
+ Random_Imag_Part : Real_Type
+ := Random_Generator (Random_Generator (Seed));
+ -- parent's formal subprogram
+ Random_Complex_No : Complex_Type;
+
+begin -- CA11013_0.CA11013_1
+
+ Random_Complex_No := Make (Random_Real_Part, Random_Imag_Part);
+ -- operation from parent
+ return (Random_Complex_No);
+
+end CA11013_0.CA11013_1;
+
+ --==================================================================--
+
+package CA11013_2 is
+
+ -- To be used as actual parameters for random number generator
+ -- in the parent package.
+
+ type My_Float is digits 6 range -10.0 .. 100.0;
+
+ function Random_Complex (Seed : My_float) return My_Float;
+
+end CA11013_2;
+
+ --==================================================================--
+
+package body CA11013_2 is
+
+ -- Not a real random number generator.
+ function Random_Complex (Seed : My_float) return My_Float is
+ begin
+ return (Seed + 3.0);
+ end Random_Complex;
+
+end CA11013_2;
+
+ --==================================================================--
+
+-- Declare instances of the generic complex packages for real type.
+-- The instance of the child must itself be declared as a child of the
+-- instance of the parent.
+
+with CA11013_0; -- Complex number.
+with CA11013_2; -- Random number generator.
+pragma Elaborate (CA11013_0);
+package CA11013_3 is new
+ CA11013_0 (Random_Generator => CA11013_2.Random_Complex,
+ Real_Type => CA11013_2.My_Float);
+
+with CA11013_0.CA11013_1; -- Random complex number operation.
+with CA11013_3;
+pragma Elaborate (CA11013_3);
+function CA11013_3.CA11013_4 is new CA11013_3.CA11013_1;
+
+ --==================================================================--
+
+with Report;
+with CA11013_2; -- Random number generator.
+with CA11013_3.CA11013_4; -- Complex abstraction + Random complex
+ -- number operation.
+procedure CA11013 is
+
+ package My_Complex_Pkg renames CA11013_3;
+ use type CA11013_2.My_Float;
+
+ My_Complex : My_Complex_Pkg.Complex_Type;
+ My_Literal : CA11013_2.My_Float := 3.0;
+ My_Real_Part, My_Imag_Part : CA11013_2.My_Float;
+
+begin
+
+ Report.Test ("CA11013", "Check that child instance can use its parent's " &
+ "declarations and operations, including a formal " &
+ "subprogram of the parent");
+
+ My_Complex := CA11013_3.CA11013_4 (My_Literal);
+ -- Operation from the generic child function.
+
+ My_Complex_Pkg.Components (My_Complex, My_Real_Part, My_Imag_Part);
+ -- Operation from the generic parent package.
+
+ if My_Real_Part /= 6.0 -- Operation from the generic
+ or My_Imag_Part /= 9.0 -- parent package.
+ then
+ Report.Failed ("Incorrect results from complex operation");
+ end if;
+
+ Report.Result;
+
+end CA11013;