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-- C360002.A

--

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--

-- OBJECTIVE:

--      Check that modular types may be used as array indices.

--

--      Check that if aliased appears in the component_definition of an

--      array_type that each component of the array is aliased.

--

--      Check that references to aliased array objects produce correct

--      results, and that out-of-bounds indexing correctly produces

--      Constraint_Error.

--

-- TEST DESCRIPTION:

--      This test defines several array types and subtypes indexed by modular

--      types; some aliased some not, some with aliased components, some not.

--

--      It then checks that assignments move the correct data.

--

--

-- CHANGE HISTORY:

--      28 SEP 95   SAIC   Initial version

--      23 APR 96   SAIC   Doc fixes, fixed constrained/unconstrained conflict

--      13 FEB 97   PWB.CTA Removed illegal declarations and affected code

--!

------------------------------------------------------------------- C360002

with Report;

procedure C360002 is

  Verbose : Boolean := Report.Ident_Bool( False );

  type Mod_128 is mod 128;

  function Ident_128( I: Integer ) return Mod_128 is

  begin

    return Mod_128( Report.Ident_Int( I ) );

  end Ident_128;

  type Unconstrained_Array

       is array( Mod_128 range <> ) of Integer;

  type Unconstrained_Array_Aliased

       is array( Mod_128 range <> ) of aliased Integer;

  type Access_All_Unconstrained_Array

       is access all Unconstrained_Array;

  type Access_All_Unconstrained_Array_Aliased

       is access all Unconstrained_Array_Aliased;

  subtype Array_01_10

          is Unconstrained_Array(01..10);

  subtype Array_11_20

          is Unconstrained_Array(11..20);

  subtype Array_Aliased_01_10

          is Unconstrained_Array_Aliased(01..10);

  subtype Array_Aliased_11_20

          is Unconstrained_Array_Aliased(11..20);

  subtype Access_All_01_10_Array

          is Access_All_Unconstrained_Array(01..10);

  subtype Access_All_01_10_Array_Aliased

          is Access_All_Unconstrained_Array_Aliased(01..10);

  subtype Access_All_11_20_Array

          is Access_All_Unconstrained_Array(11..20);

  subtype Access_All_11_20_Array_Aliased

          is Access_All_Unconstrained_Array_Aliased(11..20);

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

  -- these 'filler' functions create unique values for every element that

  -- is used and/or tested in this test.

  Well_Bottom : Integer := 0;

  function Filler( Size : Mod_128 ) return Unconstrained_Array is

    It : Unconstrained_Array( 0..Size-1 );

  begin

    for Eyes in It'Range loop

      It(Eyes) := Integer( Eyes ) + Well_Bottom;

    end loop;

    Well_Bottom := Well_Bottom + It'Length;

    return It;

  end Filler;

  function Filler( Size : Mod_128 ) return Unconstrained_Array_Aliased is

    It : Unconstrained_Array_Aliased( 0..Size-1 );

  begin

    for Ayes in It'Range loop

      It(Ayes) := Integer( Ayes ) + Well_Bottom;

    end loop;

    Well_Bottom := Well_Bottom + It'Length;

    return It;

  end Filler;

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

  An_Integer : Integer;

  type AAI is access all Integer;

  An_Integer_Access : AAI;

  Array_Item_01_10 : Array_01_10 := Filler(10); -- 0..9

  Array_Item_11_20 : Array_11_20 := Filler(10); -- 10..19 (sliding)

  Array_Aliased_Item_01_10 : Array_Aliased_01_10 := Filler(10); -- 20..29

  Array_Aliased_Item_11_20 : Array_Aliased_11_20 := Filler(10); -- 30..39

  Aliased_Array_Item_01_10 : aliased Array_01_10 := Filler(10); -- 40..49

  Aliased_Array_Item_11_20 : aliased Array_11_20 := Filler(10); -- 50..59

  Aliased_Array_Aliased_Item_01_10 : aliased Array_Aliased_01_10

                                   := Filler(10);               -- 60..69

  Aliased_Array_Aliased_Item_11_20 : aliased Array_Aliased_11_20

                                   := Filler(10);               -- 70..79

  Check_Item            : Access_All_Unconstrained_Array;

  Check_Aliased_Item    : Access_All_Unconstrained_Array_Aliased;

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

  procedure Fail( Message : String; CI, SB : Integer ) is

  begin

    Report.Failed("Wrong value passed " & Message);

    if Verbose then

      Report.Comment("got" & Integer'Image(CI) &

                     " should be" & Integer'Image(SB) );

    end if;

  end Fail;

  procedure Check_Array_01_10( Checked_Item : Array_01_10;

                               Low_SB       : Integer ) is

  begin

    for Index in Checked_Item'Range loop

      if (Checked_Item(Index) /= (Low_SB +Integer(Index)-1)) then

        Fail("unaliased 1..10", Checked_Item(Index),

                                (Low_SB +Integer(Index)-1));

      end if;

    end loop;

  end Check_Array_01_10;

  procedure Check_Array_11_20( Checked_Item : Array_11_20;

                               Low_SB       : Integer ) is

  begin

    for Index in Checked_Item'Range loop

      if (Checked_Item(Index) /= (Low_SB +Integer(Index)-11)) then

        Fail("unaliased 11..20", Checked_Item(Index),

                                 (Low_SB +Integer(Index)-11));

      end if;

    end loop;

 end Check_Array_11_20;

  procedure Check_Single_Integer( The_Integer, SB : Integer;

                                  Message         : String ) is

  begin

    if The_Integer /= SB then

      Report.Failed("Wrong integer value for " & Message );

    end if;

  end Check_Single_Integer;

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

begin  -- Main test procedure.

  Report.Test ("C360002", "Check that modular types may be used as array " &

                          "indices.  Check that if aliased appears in " &

                          "the component_definition of an array_type that " &

                          "each component of the array is aliased.  Check " &

                          "that references to aliased array objects " &

                          "produce correct results, and that out of bound " &

                          "references to aliased objects correctly " &

                          "produce Constraint_Error" );

  -- start with checks that the Filler assignments produced the expected

  -- result.  This is a "case 0" test to check that nothing REALLY surprising

  -- is happening

  Check_Array_01_10( Array_Item_01_10, 0 );

  Check_Array_11_20( Array_Item_11_20, 10 );

  -- check that having the variable aliased makes no difference

  Check_Array_01_10( Aliased_Array_Item_01_10, 40 );

  Check_Array_11_20( Aliased_Array_Item_11_20, 50 );

  -- now check that conversion between array types where the only

  -- difference in the definitions is that the components are aliased works

  Check_Array_01_10( Unconstrained_Array( Array_Aliased_Item_01_10 ), 20 );

  Check_Array_11_20( Unconstrained_Array( Array_Aliased_Item_11_20 ), 30 );

  -- check that conversion of an aliased object with aliased components

  -- also works

  Check_Array_01_10( Unconstrained_Array( Aliased_Array_Aliased_Item_01_10 ),

                     60 );

  Check_Array_11_20( Unconstrained_Array( Aliased_Array_Aliased_Item_11_20 ),

                     70 );

  -- check that the bounds will slide

  Check_Array_01_10( Array_01_10( Array_Item_11_20 ), 10 );

  Check_Array_11_20( Array_11_20( Array_Item_01_10 ),  0 );

  -- point at some of the components and check them

  An_Integer_Access := Array_Aliased_Item_01_10(5)'Access;

  Check_Single_Integer( An_Integer_Access.all, 24,

                       "Aliased component 'Access");

  An_Integer_Access := Aliased_Array_Aliased_Item_01_10(7)'Access;

  Check_Single_Integer( An_Integer_Access.all, 66,

                       "Aliased Aliased component 'Access");

  -- check some assignments

  Array_Item_01_10 := Aliased_Array_Item_01_10;

  Check_Array_01_10( Array_Item_01_10, 40 );

  Aliased_Array_Item_01_10 := Aliased_Array_Item_11_20(11..20);

  Check_Array_01_10( Aliased_Array_Item_01_10, 50 );

  Aliased_Array_Aliased_Item_11_20(11..20)

                                       := Aliased_Array_Aliased_Item_01_10;

  Check_Array_11_20( Unconstrained_Array( Aliased_Array_Aliased_Item_11_20 ),

                     60 );

  Report.Result;

end C360002;