-- 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;