--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/ada/acats/tests/cc/cc54003.a	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,234 @@
+-- CC54003.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 general access-to-subprogram type may be passed as an
+--      actual to a generic formal access-to-subprogram type. Check that
+--      designated subprograms may be called by dereferencing the access
+--      values.
+--
+-- TEST DESCRIPTION:
+--      The generic implements a stack of access-to-subprogram objects as an
+--      array. The profile of the access-to-subprogram formal corresponds to
+--      a function which accepts a parameter of some type and returns an
+--      object of the same type.
+--      
+--      For this test, the functions for which access values will be pushed
+--      onto the stack accept a parameter of type access-to-string, lengthen
+--      the pointed-to string, then return an access object pointing to this
+--      lengthened string.
+--      
+--      The instance declares a function Execute_Stack which executes each
+--      subprogram on the stack in sequence. This function accepts some initial
+--      access-to-string, then returns an access object pointing to the
+--      lengthened string resulting from the execution of the stacked
+--      subprograms. Access-to-string objects are used rather than strings
+--      themselves because the initial string "grows" during each iteration.
+--
+--
+-- CHANGE HISTORY:
+--      06 Dec 94   SAIC    ACVC 2.0
+--      10 Apr 96   SAIC    ACVC 2.1: Added pragma Elaborate to context clause
+--                          preceding CC54003_2.
+--
+--!
+
+generic
+
+   Size : in Positive;
+
+   type Item_Type (<>) is private;
+   type Item_Ptr is access Item_Type;
+
+   type Function_Ptr is access function (Item : Item_Ptr) 
+     return Item_Ptr;
+
+package CC54003_0 is -- Generic stack of pointers.
+
+   type Stack_Type is private;
+
+   procedure Push (Stack    : in out Stack_Type;
+                   Func_Ptr : in     Function_Ptr);
+
+   function Execute_Stack (Stack         : Stack_Type;
+                           Initial_Input : Item_Ptr) return Item_Ptr;
+
+   -- ... Other operations.
+
+private
+
+   subtype Index is Positive range 1 .. (Size + 1);
+   type Stack_Type is array (Index) of Function_Ptr;       -- Last slot unused.
+
+   Top : Index := 1;                  -- Top refers to the next available slot.
+
+end CC54003_0;
+
+
+     --===================================================================--
+
+
+package body CC54003_0 is
+
+   procedure Push (Stack    : in out Stack_Type;
+                   Func_Ptr : in     Function_Ptr) is
+   begin
+      Stack(Top) := Func_Ptr;
+      Top := Top + 1;     -- Artificial: no Constraint_Error protection.
+   end Push;
+
+
+   -- Call each subprogram on the stack in sequence. For the first call, pass
+   -- Initial_Input. For succeeding calls, pass the result of the previous
+   -- call.
+
+   function Execute_Stack (Stack         : Stack_Type;
+                           Initial_Input : Item_Ptr) return Item_Ptr is
+      Result : Item_Ptr := Initial_Input;
+   begin
+      for I in reverse Index'First .. (Top - 1) loop    -- Artificial: no C_E
+         Result := Stack(I)(Result);                    -- protection.
+      end loop;
+      return Result;
+   end Execute_Stack;
+
+end CC54003_0;
+
+
+     --===================================================================--
+
+
+package CC54003_1 is
+
+   subtype Message     is String;
+   type    Message_Ptr is access Message;
+
+   function Add_Prefix (Msg_Ptr : Message_Ptr) return Message_Ptr;
+   function Add_Suffix (Msg_Ptr : Message_Ptr) return Message_Ptr;
+
+   -- ...Other operations.
+
+end CC54003_1;
+
+
+     --===================================================================--
+
+
+package body CC54003_1 is
+
+   function Add_Prefix (Msg_Ptr : Message_Ptr) return Message_Ptr is
+      Sender  : constant String := "Dummy: ";    -- Artificial; in a real
+                                                 -- application Sender might
+      New_Msg : Message := Sender & Msg_Ptr.all; -- be a call to a function.
+   begin
+      return new Message'(New_Msg);
+   end Add_Prefix;
+
+
+   function Add_Suffix (Msg_Ptr : Message_Ptr) return Message_Ptr is
+      Time : constant String := " (12:03pm)";    -- Artificial; in a real
+                                                 -- application Time might be a
+      New_Msg : Message := Msg_Ptr.all & Time;   -- be a call to a function.
+   begin
+      return new Message'(New_Msg);
+   end Add_Suffix;
+
+end CC54003_1;
+
+
+     --===================================================================--
+
+
+with CC54003_0;      -- Generic stack of pointers.
+pragma Elaborate (CC54003_0);
+
+with CC54003_1;      -- Message abstraction.
+
+package CC54003_2 is
+
+   type Operation_Ptr is access function (Msg_Ptr : CC54003_1.Message_Ptr)
+     return CC54003_1.Message_Ptr;
+
+   Maximum_Ops : constant := 4;         -- Arbitrary.
+
+   package Stack_of_Ops is new CC54003_0
+     (Item_Type    => CC54003_1.Message,
+      Item_Ptr     => CC54003_1.Message_Ptr,
+      Function_Ptr => Operation_Ptr,
+      Size         => Maximum_Ops);
+
+   Operation_Stack : Stack_Of_Ops.Stack_Type;
+
+
+   procedure Create_Operation_Stack;
+
+end CC54003_2;
+
+     --===================================================================--
+
+
+package body CC54003_2 is
+
+   procedure Create_Operation_Stack is
+   begin
+      Stack_Of_Ops.Push (Operation_Stack, CC54003_1.Add_Prefix'Access);
+      Stack_Of_Ops.Push (Operation_Stack, CC54003_1.Add_Suffix'Access);
+   end Create_Operation_Stack;
+
+end CC54003_2;
+
+
+     --===================================================================--
+
+
+with CC54003_1;  -- Message abstraction.
+with CC54003_2;  -- Message-operation stack.
+
+with Report;
+procedure CC54003 is
+
+   package Msg_Ops renames CC54003_2.Stack_Of_Ops;
+
+   Msg      : CC54003_1.Message_Ptr := new CC54003_1.Message'("Hello there");
+   Expected : CC54003_1.Message     := "Dummy: Hello there (12:03pm)";
+
+begin
+   Report.Test ("CC54003", "Check that a general access-to-subprogram type " &
+                           "may be passed as an actual to a generic formal " &
+                           "access-to-subprogram type");
+
+   CC54003_2.Create_Operation_Stack;
+
+   declare
+      Actual : CC54003_1.Message_Ptr := 
+        Msg_Ops.Execute_Stack (CC54003_2.Operation_Stack, Msg);
+   begin
+      if Actual.all /= Expected then
+         Report.Failed ("Wrong result from dereferenced subprogram execution");
+      end if;
+   end;
+
+   Report.Result;
+end CC54003;