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+-- C3A0001.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 access to subprogram type can be used to select and
+--      invoke functions with appropriate arguments dynamically.
+--
+-- TEST DESCRIPTION:
+--      Declare an access to function type in a package specification.  
+--      Declare three different sine functions that can be referred to by 
+--      the access to function type.  
+--      
+--      In the main program, call each function indirectly by dereferencing 
+--      the access value.
+--
+--
+-- CHANGE HISTORY:
+--      06 Dec 94   SAIC    ACVC 2.0
+--
+--!
+
+package C3A0001_0 is
+   
+   TC_Call_Tag : Natural := 0;
+
+   -- Type accesses to any sine function
+   type Sine_Function_Ptr is access function   
+      (Angle : in Float) return Float;
+
+-- Three 'Sine' functions that model an application situation in which
+-- one function might be chosen when speed is important, another (using
+-- a different algorithm) might be chosen when accuracy is important,
+-- and so on.
+
+   function Sine_Calc_Fast  (Angle : in Float) return Float;         
+
+   function Sine_Calc_Acc   (Angle : in Float) return Float;        
+
+   function Sine_Calc_Table (Angle : in Float) return Float;        
+
+end C3A0001_0;
+
+
+-----------------------------------------------------------------------------
+
+
+package body C3A0001_0 is
+
+   function Sine_Calc_Fast (Angle : in Float) return Float is
+   begin
+      TC_Call_Tag := 1;
+      return 1.0;
+   end Sine_Calc_Fast;
+
+
+   function Sine_Calc_Acc (Angle : in Float) return Float is
+   begin
+      TC_Call_Tag := 2;
+      return 0.0;
+   end Sine_Calc_Acc;
+
+
+   function Sine_Calc_Table (Angle : in Float) return Float is
+   begin
+      TC_Call_Tag := 3;
+      return -1.0;         
+   end Sine_Calc_Table;
+
+end C3A0001_0;
+
+-----------------------------------------------------------------------------
+
+with Report;
+with C3A0001_0;
+
+procedure C3A0001 is
+
+   Sine_Access : C3A0001_0.Sine_Function_Ptr;
+   X, Theta    : Float := 0.0;
+
+begin
+
+   Report.Test ("C3A0001", "Check that access to subprogram can be " &
+                "used to select and invoke an operation with " &
+                "appropriate arguments dynamically");
+
+   Sine_Access := C3A0001_0.Sine_Calc_Fast'Access;
+
+   -- Invoking Sine function designated by access value
+   X := Sine_Access(Theta);
+
+   If C3A0001_0.TC_Call_Tag /= 1 then
+      Report.Failed ("Incorrect Sine_Calc_Fast result");
+   end if;
+
+   Sine_Access := C3A0001_0.Sine_Calc_Acc'Access;
+
+   -- Invoking Sine function designated by access value
+   X := Sine_Access(Theta);
+
+   If C3A0001_0.TC_Call_Tag /= 2 then
+      Report.Failed ("Incorrect Sine_Calc_Acc result");
+   end if;
+
+   Sine_Access := C3A0001_0.Sine_Calc_Table'Access;
+
+   -- Invoking Sine function designated by access value
+   X := Sine_Access(Theta);
+
+   If C3A0001_0.TC_Call_Tag /= 3 then
+      Report.Failed ("Incorrect Sine_Calc_Table result");
+   end if;
+
+   Report.Result;
+
+end C3A0001;