| -- 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; |
