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-- C3A0003.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 function in a generic instance can be called using
-- an access-to-subprogram value.
--
-- TEST DESCRIPTION:
-- Declare a numeric type in the visible part of a generic package.
-- Declare an access to function type. Declare three different sine
-- functions that can be referred to by the access to function type.
--
-- In the main program, instantiate the generic. Call each function
-- indirectly by dereferencing the access value.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
generic
type Real_Num is digits <>;
package C3A0003_0 is
TC_Call_Tag : Natural := 0;
-- Type accesses to any sine function
type Sine_Function_Ptr is access function
(Angle : in Real_Num) return Real_Num;
function Sine_Calc_Fast (Angle : in Real_Num) return Real_Num;
function Sine_Calc_Acc (Angle : in Real_Num) return Real_Num;
function Sine_Calc_Table (Angle : in Real_Num) return Real_Num;
end C3A0003_0;
-----------------------------------------------------------------------------
package body C3A0003_0 is
function Sine_Calc_Fast (Angle : in Real_Num) return Real_Num is
Sine_Num : Real_Num := 1.0;
begin
TC_Call_Tag := 1;
return Sine_Num;
end Sine_Calc_Fast;
function Sine_Calc_Acc (Angle : in Real_Num) return Real_Num is
Sine_Num : Real_Num := 0.0;
begin
TC_Call_Tag := 2;
return Sine_Num;
end Sine_Calc_Acc;
function Sine_Calc_Table (Angle : in Real_Num) return Real_Num is
Sine_Num : Real_Num := -1.0;
begin
TC_Call_Tag := 3;
return Sine_Num;
end Sine_Calc_Table;
end C3A0003_0;
-----------------------------------------------------------------------------
with Report;
with C3A0003_0;
procedure C3A0003 is
type Real is digits 5;
Subtype Trig_Float is Real range -1.0 .. 1.0;
package Trig is new C3A0003_0 (Real_Num => Trig_Float);
Sine_Access : Trig.Sine_Function_Ptr;
X, Theta : Trig_Float := 0.0;
begin
Report.Test ("C3A0003", "Check that a function in a generic instance can "
& "be called using an access-to-subprogram value");
Sine_Access := Trig.Sine_Calc_Fast'Access;
-- Invoking Sine function designated by access value
X := Sine_Access.all(Theta);
If Trig.TC_Call_Tag /= 1 then
Report.Failed ("Incorrect Sine_Calc_Fast result");
end if;
Sine_Access := Trig.Sine_Calc_Acc'Access;
-- Invoking Sine function designated by access value
X := Sine_Access.all(Theta);
If Trig.TC_Call_Tag /= 2 then
Report.Failed ("Incorrect Sine_Calc_Acc result");
end if;
Sine_Access := Trig.Sine_Calc_Table'Access;
-- Invoking Sine function designated by access value
X := Sine_Access.all(Theta);
If Trig.TC_Call_Tag /= 3 then
Report.Failed ("Incorrect Sine_Calc_Table result");
end if;
Report.Result;
end C3A0003;
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