old-autovect-branch/gcc/testsuite/ada/acats/support/f730a000.a

   1 -- F730A000.A
   2 --
   3 --                             Grant of Unlimited Rights
   4 --
   5 --     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
   6 --     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
   7 --     unlimited rights in the software and documentation contained herein.
   8 --     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
   9 --     this public release, the Government intends to confer upon all
  10 --     recipients unlimited rights  equal to those held by the Government.
  11 --     These rights include rights to use, duplicate, release or disclose the
  12 --     released technical data and computer software in whole or in part, in
  13 --     any manner and for any purpose whatsoever, and to have or permit others
  14 --     to do so.
  15 --
  16 --                                    DISCLAIMER
  17 --
  18 --     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
  19 --     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
  20 --     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
  21 --     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
  22 --     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
  23 --     PARTICULAR PURPOSE OF SAID MATERIAL.
  24 --*
  25 --
  26 -- FOUNDATION DESCRIPTION:
  27 --      This file simulates a generic linked list abstraction for use in tests
  28 --      covering tagged types and type extensions.
  29 --
  30 -- TEST FILES:
  31 --      This foundation consists of the following files:
  32 --
  33 --      => F730A000.A
  34 --         F730A001.A
  35 --
  36 -- CHANGE HISTORY:
  37 --      06 Dec 94   SAIC    ACVC 2.0
  38 --      03 Aug 96   SAIC    ACVC 2.1: Modified prologue. Added pragma
  39 --                          Elaborate_Body. Removed extraneous record
  40 --                          extension.
  41 --
  42 --!
  43
  44 generic  -- Singly-linked list abstraction.
  45    type Parent_Type is tagged private;                   -- Actual is parent
  46 package F730A000 is                                      -- tagged type.
  47
  48    pragma Elaborate_Body;
  49
  50
  51    -- Declarations for private linked list nodes:
  52
  53    type Priv_Node_Type is new Parent_Type with private;  -- Private extension
  54                                                          -- of parent type.
  55
  56    -- Inherits primitive operations of actual parameter corresponding
  57    -- to Parent_Type.
  58
  59
  60    type Priv_Node_Ptr is access Priv_Node_Type;
  61
  62
  63    -- Add node at head of list.
  64    procedure Add (Item : in     Priv_Node_Ptr;
  65                   Head : in out Priv_Node_Ptr);
  66
  67    -- Remove node from head of list and return it.
  68    procedure Remove (Head : in out Priv_Node_Ptr;
  69                      Item :    out Priv_Node_Ptr);
  70
  71
  72 private
  73
  74    type Priv_Node_Type is new Parent_Type with record
  75       Next : Priv_Node_Ptr := null;
  76    end record;
  77
  78 end F730A000;
  79
  80
  81      --==================================================================--
  82
  83
  84 package body F730A000 is  -- Singly-linked list abstraction.
  85
  86
  87    procedure Add (Item : in     Priv_Node_Ptr;
  88                   Head : in out Priv_Node_Ptr) is
  89    begin
  90       if Item /= null then
  91          Item.Next := Head;
  92          Head := Item;
  93       end if;
  94    end Add;
  95
  96
  97    procedure Remove (Head : in out Priv_Node_Ptr;
  98                      Item :    out Priv_Node_Ptr) is
  99    begin
 100       Item := Head;
 101       if Head /= null then
 102          Head := Head.Next;
 103       end if;
 104    end Remove;
 105
 106
 107 end F730A000;