gomp-20050608-branch/gcc/testsuite/ada/acats/tests/cc/cc70003.a

   1 -- CC70003.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 -- OBJECTIVE:
  27 --      Check that the actual passed to a formal package may be a formal
  28 --      access-to-subprogram type. Check that the visible part of the generic
  29 --      formal package includes the first list of basic declarative items of
  30 --      the package specification.
  31 --
  32 -- TEST DESCRIPTION:
  33 --      Declare a list abstraction in a generic package which manages lists of
  34 --      elements of any nonlimited type (foundation code). Declare a generic
  35 --      package which supports the execution of lists of operations. Provide
  36 --      the generic package with two formal parameters: (1) a formal access-
  37 --      to-function type, and (2) a generic formal package with the list
  38 --      abstraction package as template. Within a procedure declared in the
  39 --      list-execution package, utilize information about the profile of
  40 --      the functions in the list. Declare a package which declares functions
  41 --      matching the profile of the formal access-to-subprogram type. In the
  42 --      main program, create a list of pointers to the functions declared in
  43 --      the package, instantiate the list abstraction and list-execution
  44 --      packages, and use the list-execution procedure to call each of the
  45 --      functions in the list in sequence.
  46 --
  47 --
  48 -- CHANGE HISTORY:
  49 --      06 Dec 94   SAIC    ACVC 2.0
  50 --
  51 --!
  52
  53 generic
  54    type Element_Type is private;
  55 package CC70003_0 is  -- This package simulates a generic list abstraction.
  56
  57    -- The definition of List_Type below is purely artificial; its validity
  58    -- in the context of the abstraction is irrelevant to the feature being
  59    -- tested.
  60
  61    type Element_Ptr is access Element_Type;
  62
  63    subtype List_Size is Natural range 1 .. 2;
  64    type List_Type is array (List_Size) of Element_Ptr;
  65
  66    function  View_Element (I : List_Size; L : List_Type) return Element_Type;
  67
  68    procedure Write_Element (I : in     List_Size;
  69                             L : in out List_Type;
  70                             E : in     Element_Type);
  71
  72    -- ... Other list operations for Element_Type.
  73
  74 end CC70003_0;
  75
  76
  77      --==================================================================--
  78
  79
  80 package body CC70003_0 is
  81
  82    -- The implementations of the operations below are purely artificial; the
  83    -- validity of their implementations in the context of the abstraction is
  84    -- irrelevant to the feature being tested.
  85
  86    function View_Element (I : List_Size; L : List_Type) return Element_Type is
  87    begin
  88       return L(I).all;
  89    end View_Element;
  90
  91
  92    procedure Write_Element (I : in     List_Size;
  93                             L : in out List_Type;
  94                             E : in     Element_Type) is
  95    begin
  96       L(I) := new Element_Type'(E);
  97    end Write_Element;
  98
  99 end CC70003_0;
 100
 101
 102      --==================================================================--
 103
 104
 105 with CC70003_0;    -- Generic list abstraction.
 106 generic
 107    type Elem_Type is access function (F : Float) return Float;
 108    with package List_Mgr is new CC70003_0 (Elem_Type);
 109 package CC70003_1 is  -- This package simulates support for executing lists
 110                       -- of operations.
 111
 112    procedure Execute_List (L : List_Mgr.List_Type; F : in out Float);
 113
 114    -- ... Other operations.
 115
 116 end CC70003_1;
 117
 118
 119      --==================================================================--
 120
 121
 122 package body CC70003_1 is
 123
 124    procedure Execute_List (L : List_Mgr.List_Type; F : in out Float) is
 125    begin
 126       for I in L'Range loop
 127          F := List_Mgr.View_Element(I, L)(F);   -- Execute next operation in
 128       end loop;                                 -- list with current value of
 129    end Execute_List;                            -- F as operand.
 130
 131
 132 end CC70003_1;
 133
 134
 135      --==================================================================--
 136
 137
 138 package CC70003_2 is
 139
 140    function Sine (F : Float) return Float;
 141    function Exp  (F : Float) return Float;
 142
 143    -- ... Other math functions.
 144
 145 end CC70003_2;
 146
 147
 148      --==================================================================--
 149
 150
 151 package body CC70003_2 is
 152
 153    -- The implementations of the functions below are purely artificial; the
 154    -- validity of their implementations in the context of the abstraction is
 155    -- irrelevant to the feature being tested.
 156
 157    function Sine (F : Float) return Float is
 158    begin
 159       return (-0.15);
 160    end Sine;
 161
 162    function Exp (F : Float) return Float is
 163    begin
 164       if (F = 0.0) then
 165          return (-0.69);
 166       else
 167          return (2.0);  -- This branch should be taken.
 168       end if;
 169    end Exp;
 170
 171 end CC70003_2;
 172
 173
 174      --==================================================================--
 175
 176
 177 with CC70003_0;    -- Generic list abstraction.
 178 with CC70003_1;  -- Generic operation-list abstraction.
 179 with CC70003_2;  -- Math library.
 180
 181 with Report;
 182 procedure CC70003 is
 183
 184    type Math_Op is access function (F : Float) return Float;
 185
 186    package Math_Op_Lists        is new CC70003_0 (Math_Op);
 187    package Math_Op_List_Support is new CC70003_1 (Math_Op, Math_Op_Lists);
 188
 189    Sin_Ptr : Math_Op := CC70003_2.Sine'Access;
 190    Exp_Ptr : Math_Op := CC70003_2.Exp'Access;
 191
 192    Op_List : Math_Op_Lists.List_Type;
 193
 194    Operand  : Float := 0.0;
 195    Expected : Float := 2.0;
 196
 197
 198 begin
 199    Report.Test ("CC70003", "Check that the actual passed to a formal " &
 200                 "package may be a formal access-to-subprogram type");
 201
 202    Math_Op_Lists.Write_Element (1, Op_List, Sin_Ptr);
 203    Math_Op_Lists.Write_Element (2, Op_List, Exp_Ptr);
 204
 205    Math_Op_List_Support.Execute_List (Op_List, Operand);
 206
 207    if (Operand /= Expected) then
 208       Report.Failed ("Incorrect results from indirect function calls");
 209    end if;
 210
 211    Report.Result;
 212 end CC70003;