From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,CP1252 X-Google-Thread: 103376,39ed0c6d1b17bc59 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2003-07-10 15:37:17 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!wn14feed!worldnet.att.net!204.127.198.203!attbi_feed3!attbi.com!rwcrnsc51.ops.asp.att.net.POSTED!not-for-mail Message-ID: <3F0DEA7A.3030209@attbi.com> From: "Robert I. Eachus" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01 X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: HELP ! Problems with Get and Put in Generic Procedure References: <9f383bcd.0307101401.60625c77@posting.google.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit NNTP-Posting-Host: 24.62.164.137 X-Complaints-To: abuse@comcast.net X-Trace: rwcrnsc51.ops.asp.att.net 1057876636 24.62.164.137 (Thu, 10 Jul 2003 22:37:16 GMT) NNTP-Posting-Date: Thu, 10 Jul 2003 22:37:16 GMT Organization: Comcast Online Date: Thu, 10 Jul 2003 22:37:16 GMT Xref: archiver1.google.com comp.lang.ada:40178 Date: 2003-07-10T22:37:16+00:00 List-Id: Tanya wrote: > I am having problems compiling a program that uses a generic GetData > procedure. Inside this procedure I try to Get data from the keyboard > and store into an array. My generic specification and body both > compile fine...but when I try to instantiate the generic procedure in > the main driver, I get errors: > "procedure or entry name expected" and "expect valid subprogram name > in renaming". What am I doing wrong ?? I can't find any examples of > how to do this. Any help would be greatly appreciated !!! Thanks ! > > Here is my program: > > (generic spec file) ****************************************** > > GENERIC > > TYPE ElementType IS PRIVATE; -- any nonlimited type > TYPE IndexType IS ( <> ); -- any discrete type for > -- index value > TYPE ArrayType IS ARRAY (IndexType RANGE <>) OF ElementType; > > WITH PROCEDURE Read (Item : IN ElementType); > > PROCEDURE Get_Array_Generic (List : IN OUT ArrayType); > -- Input : Array type and input file stream. > -- Action: Will read in elements and store in array. > -- Output: Array filled with elements. > > > (generic body file) ******************************************** > > PROCEDURE Get_Array_Generic (List : IN OUT ArrayType) IS > ------------------------------------------------------------------- > -- Input : Array type and input file stream. > -- Action: Will read in elements and store in array. > -- Output: Array filled with elements. > ------------------------------------------------------------------- > > Index : IndexType; > Element : ElementType; > > BEGIN -- Get_Array_Generic > > Index := List'Last; -- initialize array index to > -- first subscript > > FOR Index IN List'RANGE LOOP > > Read (Item => Element); -- read elements into array > > -- store data into the array > > List (Index) := Element; > > END LOOP; > > END Get_Array_Generic; > > > (Main driver ) ******************************************** > > > WITH Ada.Text_IO; > USE Ada.Text_IO; > WITH Ada.Integer_Text_IO; > USE Ada.Integer_Text_IO; > > > PROCEDURE Generic_Test IS > ---------------------------------------------------------------------- > -- Input : None > -- Action: > -- Output: None > ---------------------------------------------------------------------- > > MaxInt : CONSTANT Integer := 10; > SUBTYPE IntegerRange IS Integer RANGE 1..MaxInt; > TYPE Integer_Array IS ARRAY (IntegerRange RANGE <>) OF Integer; > > > *** This is where I am having problems (in the instantiation) *** > > > PROCEDURE GetIntegers IS NEW Get_Array_Generic > (ElementType => Integer, > IndexType => IntegerRange, > ArrayType => Integer_Array, > Read => Ada.Integer_Text_IO); -- This is the problem. You need a procedure here not a package name. > > IntArray : Integer_Array(IntegerRange); > > TargetInteger : Integer; > > BEGIN -- Generic_Test > > Ada.Text_IO.Put (Item => "Please enter "); > Ada.Integer_Text_IO.Put (Item => MaxInt, Width => 2); > Ada.Text_IO.Put (Item => " integer values: "); > Ada.Text_IO.New_Line; > > GetIntegers (List => IntArray); > > END Generic_Test; But Read => Ada.Integer_Text_IO.Read won't work because the parameter profile doesn't match Get or Put. You can change your generic to match, or put a "wrapper" around Ada.Text_IO.Get. (But remember that in and out are part of the profile.) For those of you who worry about helping students too much, I think this is a tricky enough issue to justify this amount of help. (I suspect that Tanya first tried with Read => Ada.Integer_Text_IO.Get.) If this doesn't get Tanya over the hump, she can ask her instructor or TA. -- Robert I. Eachus �In an ally, considerations of house, clan, planet, race are insignificant beside two prime questions, which are: 1. Can he shoot? 2. Will he aim at your enemy?� -- from the Laiden novels by Sharon Lee and Steve Miller.