Commit | Line | Data |
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618f726f | 1 | -- Copyright 2012-2016 Free Software Foundation, Inc. |
cdde3dfb JG |
2 | -- |
3 | -- This program is free software; you can redistribute it and/or modify | |
4 | -- it under the terms of the GNU General Public License as published by | |
5 | -- the Free Software Foundation; either version 3 of the License, or | |
6 | -- (at your option) any later version. | |
7 | -- | |
8 | -- This program is distributed in the hope that it will be useful, | |
9 | -- but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | -- GNU General Public License for more details. | |
12 | -- | |
13 | -- You should have received a copy of the GNU General Public License | |
14 | -- along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | ||
16 | package Classes is | |
17 | ||
18 | type Point is record | |
19 | X : Integer; | |
20 | Y : Integer; | |
21 | end record; | |
22 | ||
23 | type Shape is abstract tagged null record; | |
24 | ||
25 | type Shape_Access is access all Shape'Class; | |
26 | ||
27 | type Drawable is interface; | |
28 | ||
29 | type Drawable_Access is access all Drawable'Class; | |
30 | ||
31 | procedure Draw (D : Drawable) is abstract; | |
32 | ||
33 | type Circle is new Shape and Drawable with record | |
34 | Center : Point; | |
35 | Radius : Natural; | |
36 | end record; | |
37 | ||
38 | procedure Draw (R : Circle); | |
39 | ||
40 | My_Circle : Circle := ((1, 2), 3); | |
41 | My_Shape : Shape'Class := Shape'Class (My_Circle); | |
42 | My_Drawable : Drawable'Class := Drawable'Class (My_Circle); | |
43 | ||
44 | S_Access : Shape_Access := new Circle'(My_Circle); | |
45 | D_Access : Drawable_Access := new Circle'(My_Circle); | |
46 | ||
47 | type R (MS : Shape_Access; MD : Drawable_Access) is record | |
48 | E : Integer; | |
49 | end record; | |
50 | ||
51 | MR : R := (MS => S_Access, MD => D_Access, E => 42); | |
52 | ||
53 | type Shape_Array is array (1 .. 4) of Shape_Access; | |
54 | type Drawable_Array is array (1 .. 4) of Drawable_Access; | |
55 | ||
56 | S_Array : Shape_Array := (others => S_Access); | |
57 | D_Array : Drawable_Array := (others => D_Access); | |
58 | ||
59 | end Classes; |