1-- C340A02.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 a record extension (declared in a package specification) of 28-- a tagged type (declared in a different package specification) may be 29-- passed as a generic formal (tagged) private type to a generic package 30-- declaration. Check that the formal type may be further extended with a 31-- record extension in the generic package. 32-- 33-- Check that, in the instance, the record extension inherits the 34-- user-defined primitive subprograms of the tagged actual, including 35-- those inherited by the actual from its parent. 36-- 37-- TEST DESCRIPTION: 38-- Declare a tagged type and an associated primitive subprogram in a 39-- package specification (foundation code). Declare a record extension 40-- of the tagged type and an associated primitive subprogram in a second 41-- package specification. Declare a generic package which takes a tagged 42-- type as a formal parameter, and then extends it with a record 43-- extension (foundation code). 44-- 45-- Instantiate the generic package with the record extension from the 46-- second package (the "generic" extension should now have inherited 47-- the primitive subprograms of the record extension from the second 48-- package). 49-- 50-- In the main program, call the primitive subprograms inherited by the 51-- "generic" extension. There are two: (1) Create_Book, declared for 52-- the root tagged type in the first package (inherited by the record 53-- extension of the second package, and then in turn by the "generic" 54-- extension), and (2) Update_Pages, declared for the record extension 55-- in the second package. Verify the correctness of the components. 56-- 57-- TEST FILES: 58-- This test consists of the following files: 59-- 60-- F340A000.A 61-- F340A001.A 62-- => C340A02.A 63-- 64-- 65-- CHANGE HISTORY: 66-- 06 Dec 94 SAIC ACVC 2.0 67-- 12 Jun 96 SAIC ACVC 2.1: Modified prologue. Removed extraneous 68-- comments. 69-- 70--! 71 72with F340A001; -- Book definitions. 73package C340A02_0 is -- Extended book abstraction. 74 75 76 type Detailed_Book_Type is new F340A001.Book_Type with record 77 Pages : Natural; -- Record ext. 78 end record; -- of root tagged 79 -- type. 80 81 -- Inherits Create_Book from Book_Type. 82 83 procedure Update_Pages (Book : in out Detailed_Book_Type; -- Primitive op. 84 Pages : in Natural); -- of extension. 85 86 87end C340A02_0; 88 89 90 --==================================================================-- 91 92 93package body C340A02_0 is 94 95 96 procedure Update_Pages (Book : in out Detailed_Book_Type; 97 Pages : in Natural) is 98 begin 99 Book.Pages := Pages; 100 end Update_Pages; 101 102 103end C340A02_0; 104 105 106 --==================================================================-- 107 108 109with F340A001; -- Book definitions. 110package C340A02_1 is -- Raw data to be used in creating book elements. 111 112 113 Book_Count : constant := 3; 114 115 subtype Number_Of_Books is Integer range 1 .. Book_Count; 116 117 type Data_List is array (Number_Of_Books) of F340A001.Text_Ptr; 118 type Page_Counts is array (Number_Of_Books) of Natural; 119 120 Title_List : Data_List := (new String'("Wuthering Heights"), 121 new String'("Heart of Darkness"), 122 new String'("Ulysses")); 123 124 Author_List : Data_List := (new String'("Bronte, Emily"), 125 new String'("Conrad, Joseph"), 126 new String'("Joyce, James")); 127 128 Page_List : Page_Counts := (237, 215, 456); 129 130end C340A02_1; 131 132 133 --==================================================================-- 134 135 136-- Library-level instantiation. Actual parameter is record extension. 137 138with C340A02_0; -- Extended book abstraction. 139with F340A000; -- Singly-linked list abstraction. 140package C340A02_2 is new F340A000 141 (Parent_Type => C340A02_0.Detailed_Book_Type); 142 143 144 --==================================================================-- 145 146 147with Report; 148 149with C340A02_0; -- Extended book abstraction. 150with C340A02_1; -- Raw book data. 151with C340A02_2; -- Instance. 152 153use C340A02_0; -- Primitive operations of Detailed_Book_Type directly visible. 154use C340A02_2; -- Operations inherited by Node_Type directly visible. 155 156procedure C340A02 is 157 158 159 List_Of_Books : Node_Ptr := null; -- Head of linked list of books. 160 161 162 --========================================================-- 163 164 165 procedure Create_List (Title, Author : in C340A02_1.Data_List; 166 Pages : in C340A02_1.Page_Counts; 167 Head : in out Node_Ptr) is 168 169 Book : Node_Type; -- Object of extended type. 170 Book_Ptr : Node_Ptr; 171 172 begin 173 for I in C340A02_1.Number_Of_Books loop 174 Create_Book (Title (I), Author (I), Book); -- Call twice-inherited 175 -- operation. 176 Update_Pages (Book, Pages (I)); -- Call inherited op. 177 Book_Ptr := new Node_Type'(Book); 178 Add (Book_Ptr, Head); 179 end loop; 180 end Create_List; 181 182 183 --========================================================-- 184 185 186 function Bad_List_Contents return Boolean is 187 begin 188 return (List_Of_Books.Title.all /= "Ulysses" or 189 List_Of_Books.Author.all /= "Joyce, James" or 190 List_Of_Books.Pages /= 456 or 191 List_Of_Books.Next.Title.all /= "Heart of Darkness" or 192 List_Of_Books.Next.Author.all /= "Conrad, Joseph" or 193 List_Of_Books.Next.Pages /= 215 or 194 List_Of_Books.Next.Next.Title.all /= "Wuthering Heights" or 195 List_Of_Books.Next.Next.Author.all /= "Bronte, Emily" or 196 List_Of_Books.Next.Next.Pages /= 237); 197 198 end Bad_List_Contents; 199 200 201 --========================================================-- 202 203 204begin -- Main program. 205 206 Report.Test ("C340A02", "Inheritance of primitive operations: record " & 207 "extension of formal tagged private type; actual is " & 208 "a record extension"); 209 210 -- Create linked list using inherited operation: 211 Create_List (C340A02_1.Title_List, C340A02_1.Author_List, 212 C340A02_1.Page_List, List_Of_Books); 213 214 -- Verify results: 215 if Bad_List_Contents then 216 Report.Failed ("Wrong values after call to inherited operations"); 217 end if; 218 219 Report.Result; 220 221end C340A02; 222