-- CC54004.A
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-- CC54004.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 the designated type of a generic formal pool-specific
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-- Check that the designated type of a generic formal pool-specific
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-- access type may be class-wide. Check that calls to primitive
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-- access type may be class-wide. Check that calls to primitive
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-- subprograms in the instance dispatch to the appropriate bodies when
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-- subprograms in the instance dispatch to the appropriate bodies when
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-- the controlling operand is a dereference of an object of the access-
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-- the controlling operand is a dereference of an object of the access-
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-- to-class-wide type.
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-- to-class-wide type.
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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 hierarchy of types is declared in two packages. The root type of
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-- A hierarchy of types is declared in two packages. The root type of
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-- the class is declared as abstract in a separate package. It possesses
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-- the class is declared as abstract in a separate package. It possesses
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-- an abstract primitive subprogram Handle. A concrete type extends the
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-- an abstract primitive subprogram Handle. A concrete type extends the
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-- root type in a second package with a component of an enumeration type.
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-- root type in a second package with a component of an enumeration type.
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-- A second type extends this extension in the same package. Both
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-- A second type extends this extension in the same package. Both
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-- derivatives override the root type's primitive subprogram with a
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-- derivatives override the root type's primitive subprogram with a
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-- non-abstract subprogram.
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-- non-abstract subprogram.
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--
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--
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-- The generic implements a heterogeneous stack of access-to-class-wide
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-- The generic implements a heterogeneous stack of access-to-class-wide
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-- objects in the root type's class. A subprogram declared in the
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-- objects in the root type's class. A subprogram declared in the
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-- generic calls Handle using dereferences of each of the class-wide
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-- generic calls Handle using dereferences of each of the class-wide
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-- objects on the stack as operand. Each call to Handle should dispatch
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-- objects on the stack as operand. Each call to Handle should dispatch
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-- to the appropriate body based on the tag of the operand. The
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-- to the appropriate body based on the tag of the operand. The
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-- overriding versions of Handle each set the component of the type to
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-- overriding versions of Handle each set the component of the type to
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-- a different value. The value of the component is checked to verify
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-- a different value. The value of the component is checked to verify
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-- that the calls dispatched correctly.
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-- that the calls dispatched correctly.
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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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-- 10 Apr 96 SAIC ACVC 2.1: Added pragma Elaborate to context clause
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-- 10 Apr 96 SAIC ACVC 2.1: Added pragma Elaborate to context clause
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-- preceding CC54004_3.
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-- preceding CC54004_3.
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--
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--
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--!
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--!
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package CC54004_0 is
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package CC54004_0 is
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-- The types and operations defined here are artificial. The component
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-- The types and operations defined here are artificial. The component
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-- TC_Code is the only component required for testing purposes.
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-- TC_Code is the only component required for testing purposes.
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type TC_Code_Type is (None, Low, Medium);
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type TC_Code_Type is (None, Low, Medium);
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type Alert is abstract tagged record -- Abstract type.
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type Alert is abstract tagged record -- Abstract type.
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TC_Code : TC_Code_Type; -- Testing flag.
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TC_Code : TC_Code_Type; -- Testing flag.
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end record;
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end record;
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procedure Handle (A : in out Alert); -- Non-abstract primitive
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procedure Handle (A : in out Alert); -- Non-abstract primitive
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-- subprogram.
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-- subprogram.
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-- ...Other operations.
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-- ...Other operations.
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type Alert_Ptr is access Alert'Class; -- Access-to-class-wide
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type Alert_Ptr is access Alert'Class; -- Access-to-class-wide
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-- type.
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-- type.
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end CC54004_0;
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end CC54004_0;
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--===================================================================--
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--===================================================================--
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package body CC54004_0 is
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package body CC54004_0 is
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procedure Handle (A : in out Alert) is
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procedure Handle (A : in out Alert) is
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begin
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begin
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A.TC_Code := None;
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A.TC_Code := None;
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end Handle;
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end Handle;
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end CC54004_0;
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end CC54004_0;
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--===================================================================--
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--===================================================================--
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with CC54004_0;
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with CC54004_0;
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use CC54004_0;
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use CC54004_0;
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package CC54004_1 is
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package CC54004_1 is
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type Low_Alert is new CC54004_0.Alert with record
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type Low_Alert is new CC54004_0.Alert with record
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C1 : String (1 .. 5) := "Dummy";
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C1 : String (1 .. 5) := "Dummy";
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-- ...Other components.
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-- ...Other components.
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end record;
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end record;
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procedure Handle (A : in out Low_Alert); -- Overrides parent's
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procedure Handle (A : in out Low_Alert); -- Overrides parent's
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-- operations.
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-- operations.
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--...Other operations.
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--...Other operations.
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type Medium_Alert is new Low_Alert with record
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type Medium_Alert is new Low_Alert with record
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C : Integer := 6;
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C : Integer := 6;
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-- ...Other components.
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-- ...Other components.
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end record;
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end record;
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procedure Handle (A : in out Medium_Alert); -- Overrides parent's
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procedure Handle (A : in out Medium_Alert); -- Overrides parent's
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-- operations.
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-- operations.
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--...Other operations.
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--...Other operations.
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end CC54004_1;
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end CC54004_1;
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--===================================================================--
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--===================================================================--
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package body CC54004_1 is
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package body CC54004_1 is
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procedure Handle (A : in out Low_Alert) is
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procedure Handle (A : in out Low_Alert) is
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begin
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begin
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A.TC_Code := Low;
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A.TC_Code := Low;
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end Handle;
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end Handle;
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procedure Handle (A : in out Medium_Alert) is
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procedure Handle (A : in out Medium_Alert) is
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begin
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begin
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A.TC_Code := Medium;
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A.TC_Code := Medium;
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end Handle;
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end Handle;
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end CC54004_1;
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end CC54004_1;
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--===================================================================--
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--===================================================================--
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with CC54004_0;
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with CC54004_0;
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generic
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generic
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type Element_Type is abstract new CC54004_0.Alert with private;
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type Element_Type is abstract new CC54004_0.Alert with private;
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type Element_Ptr is access Element_Type'Class;
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type Element_Ptr is access Element_Type'Class;
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package CC54004_2 is
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package CC54004_2 is
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type Stack_Type is private;
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type Stack_Type is private;
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procedure Push (Stack : in out Stack_Type;
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procedure Push (Stack : in out Stack_Type;
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Elem_Ptr : in Element_Ptr);
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Elem_Ptr : in Element_Ptr);
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procedure Pop (Stack : in out Stack_Type;
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procedure Pop (Stack : in out Stack_Type;
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Elem_Ptr : out Element_Ptr);
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Elem_Ptr : out Element_Ptr);
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procedure Process_Stack (Stack : in out Stack_Type);
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procedure Process_Stack (Stack : in out Stack_Type);
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-- ... Other operations.
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-- ... Other operations.
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private
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private
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subtype Index is Positive range 1 .. 5;
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subtype Index is Positive range 1 .. 5;
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type Stack_Type is array (Index) of Element_Ptr;
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type Stack_Type is array (Index) of Element_Ptr;
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Top : Index := 1;
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Top : Index := 1;
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end CC54004_2;
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end CC54004_2;
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--===================================================================--
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--===================================================================--
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package body CC54004_2 is
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package body CC54004_2 is
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procedure Push (Stack : in out Stack_Type;
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procedure Push (Stack : in out Stack_Type;
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Elem_Ptr : in Element_Ptr) is
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Elem_Ptr : in Element_Ptr) is
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begin
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begin
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Stack(Top) := Elem_Ptr;
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Stack(Top) := Elem_Ptr;
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Top := Top + 1; -- Artificial: no Constraint_Error protection.
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Top := Top + 1; -- Artificial: no Constraint_Error protection.
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end Push;
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end Push;
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procedure Pop (Stack : in out Stack_Type;
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procedure Pop (Stack : in out Stack_Type;
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Elem_Ptr : out Element_Ptr)is
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Elem_Ptr : out Element_Ptr)is
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begin
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begin
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Top := Top - 1; -- Artificial: no Constraint_Error protection.
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Top := Top - 1; -- Artificial: no Constraint_Error protection.
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Elem_Ptr := Stack(Top);
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Elem_Ptr := Stack(Top);
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end Pop;
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end Pop;
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-- Call Handle for each element on the stack. Since the dereferenced access
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-- Call Handle for each element on the stack. Since the dereferenced access
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-- object is of a class-wide type, all calls to Handle are dispatching. The
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-- object is of a class-wide type, all calls to Handle are dispatching. The
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-- version of Handle called will be that declared for the type
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-- version of Handle called will be that declared for the type
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-- corresponding to the tag of the operand.
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-- corresponding to the tag of the operand.
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procedure Process_Stack (Stack : in out Stack_Type) is
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procedure Process_Stack (Stack : in out Stack_Type) is
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begin -- Artificial: no Constraint_Error protection.
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begin -- Artificial: no Constraint_Error protection.
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for I in reverse Index'First .. (Top - 1) loop
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for I in reverse Index'First .. (Top - 1) loop
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Handle (Stack(I).all); -- Call dispatches based on
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Handle (Stack(I).all); -- Call dispatches based on
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end loop; -- tag of operand.
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end loop; -- tag of operand.
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end Process_Stack;
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end Process_Stack;
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end CC54004_2;
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end CC54004_2;
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--===================================================================--
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--===================================================================--
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with CC54004_0;
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with CC54004_0;
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with CC54004_1;
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with CC54004_1;
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with CC54004_2;
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with CC54004_2;
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pragma Elaborate (CC54004_2);
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pragma Elaborate (CC54004_2);
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package CC54004_3 is
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package CC54004_3 is
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package Alert_Stacks is new CC54004_2 (Element_Type => CC54004_0.Alert,
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package Alert_Stacks is new CC54004_2 (Element_Type => CC54004_0.Alert,
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Element_Ptr => CC54004_0.Alert_Ptr);
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Element_Ptr => CC54004_0.Alert_Ptr);
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-- All overriding versions of Handle visible at the point of instantiation.
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-- All overriding versions of Handle visible at the point of instantiation.
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Alert_List : Alert_Stacks.Stack_Type;
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Alert_List : Alert_Stacks.Stack_Type;
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procedure TC_Create_Alert_Stack;
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procedure TC_Create_Alert_Stack;
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end CC54004_3;
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end CC54004_3;
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--===================================================================--
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--===================================================================--
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package body CC54004_3 is
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package body CC54004_3 is
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procedure TC_Create_Alert_Stack is
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procedure TC_Create_Alert_Stack is
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begin
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begin
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Alert_Stacks.Push (Alert_List, new CC54004_1.Low_Alert);
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Alert_Stacks.Push (Alert_List, new CC54004_1.Low_Alert);
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Alert_Stacks.Push (Alert_List, new CC54004_1.Medium_Alert);
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Alert_Stacks.Push (Alert_List, new CC54004_1.Medium_Alert);
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end TC_Create_Alert_Stack;
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end TC_Create_Alert_Stack;
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end CC54004_3;
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end CC54004_3;
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--===================================================================--
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--===================================================================--
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with CC54004_0;
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with CC54004_0;
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with CC54004_1;
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with CC54004_1;
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with CC54004_3;
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with CC54004_3;
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with Report;
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with Report;
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procedure CC54004 is
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procedure CC54004 is
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TC_Low_Ptr, TC_Med_Ptr : CC54004_0.Alert_Ptr;
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TC_Low_Ptr, TC_Med_Ptr : CC54004_0.Alert_Ptr;
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TC_Low_Actual : CC54004_1.Low_Alert;
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TC_Low_Actual : CC54004_1.Low_Alert;
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TC_Med_Actual : CC54004_1.Medium_Alert;
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TC_Med_Actual : CC54004_1.Medium_Alert;
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use type CC54004_0.TC_Code_Type;
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use type CC54004_0.TC_Code_Type;
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begin
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begin
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Report.Test ("CC54004", "Check that the designated type of a generic " &
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Report.Test ("CC54004", "Check that the designated type of a generic " &
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"formal pool-specific access type may be class-wide");
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"formal pool-specific access type may be class-wide");
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-- Create stack of elements:
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-- Create stack of elements:
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CC54004_3.TC_Create_Alert_Stack;
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CC54004_3.TC_Create_Alert_Stack;
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-- Commence dispatching operations on stack elements:
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-- Commence dispatching operations on stack elements:
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CC54004_3.Alert_Stacks.Process_Stack (CC54004_3.Alert_List);
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CC54004_3.Alert_Stacks.Process_Stack (CC54004_3.Alert_List);
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-- Pop "handled" alerts off stack:
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-- Pop "handled" alerts off stack:
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CC54004_3.Alert_Stacks.Pop (CC54004_3.Alert_List, TC_Med_Ptr);
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CC54004_3.Alert_Stacks.Pop (CC54004_3.Alert_List, TC_Med_Ptr);
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CC54004_3.Alert_Stacks.Pop (CC54004_3.Alert_List, TC_Low_Ptr);
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CC54004_3.Alert_Stacks.Pop (CC54004_3.Alert_List, TC_Low_Ptr);
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-- Verify results:
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-- Verify results:
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if TC_Low_Ptr.all not in CC54004_1.Low_Alert or else
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if TC_Low_Ptr.all not in CC54004_1.Low_Alert or else
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TC_Med_Ptr.all not in CC54004_1.Medium_Alert
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TC_Med_Ptr.all not in CC54004_1.Medium_Alert
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then
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then
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Report.Failed ("Class-wide objects do not have expected tags");
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Report.Failed ("Class-wide objects do not have expected tags");
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-- The explicit dereference of the "Pop"ed pointers results in views of
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-- The explicit dereference of the "Pop"ed pointers results in views of
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-- the designated objects, the nominal subtypes of which are class-wide.
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-- the designated objects, the nominal subtypes of which are class-wide.
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-- In order to be able to reference the component TC_Code, these views
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-- In order to be able to reference the component TC_Code, these views
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-- must be converted to a specific type possessing that component.
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-- must be converted to a specific type possessing that component.
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elsif CC54004_1.Low_Alert(TC_Low_Ptr.all).TC_Code /= CC54004_0.Low or
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elsif CC54004_1.Low_Alert(TC_Low_Ptr.all).TC_Code /= CC54004_0.Low or
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CC54004_1.Medium_Alert(TC_Med_Ptr.all).TC_Code /= CC54004_0.Medium
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CC54004_1.Medium_Alert(TC_Med_Ptr.all).TC_Code /= CC54004_0.Medium
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then
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then
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Report.Failed ("Calls did not dispatch to expected operations");
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Report.Failed ("Calls did not dispatch to expected operations");
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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 CC54004;
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end CC54004;
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