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From: george.priv@gmail.com
Newsgroups: comp.lang.ada
Subject: Re: What's wrong with my code?
Date: Mon, 28 Apr 2008 08:23:10 -0700 (PDT)
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Date: 2008-04-28T08:23:10-07:00
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On Apr 28, 10:42 am, amal.alpho...@gmail.com wrote:
> Sorry if I'm posting in the wrong forum.
>
> I have a generic package, with specification:
>
> generic
>    type Element is private;
>    with procedure Element_Put(E : in Element);
> package SelectionP is
>    type My_Array is array (0..10) of Element;
>    Max : constant Integer := 10;
>    procedure Find_Min (A : My_Array; Offset : Integer; Pos : Integer);
>    procedure Swap (A : in out My_Array; First : Integer; Second :
> Integer);
>    procedure Sort (A : in out My_Array);
>    procedure Print (A : in My_Array);
> end SelectionP;
> --------------------------------------------------
> and its package body is:
>
> package body SelectionP is
>
>    A : My_Array;
>
>    procedure Find_Min (A : My_Array; Offset : Integer; Pos : Integer)
> is
>     ...
>    end Find_Min;
>
>    procedure Swap (A : in out My_Array; First : Integer; Second :
> Integer)  is
>       ...
>    end Swap;
>
>    procedure Sort (A : in out My_Array) is
>      ...
>    end Sort;
>    procedure Print (A: in out My_Array) is
>      ...
>    end Print;
>
> end SelectionP;
> -------------------------------------------
>
> And I try to make use of this package in this file:
> with Ada.Text_IO, Ada.Integer_Text_IO;
> with SelectionP;
> procedure SelectionPUser is
>    package IntSelectionP is new SelectionP(Integer, Ada.Text_IO.Put);

should be:

package IntSelectionP is new SelectionP(Integer,
Ada.Integer_Text_IO.Put);

> begin
>    Ada.Text_IO.New_Line;
> end SelectionPUser;
>
> ---
>
> I try to compile but it says 'no visible subprogram matches the
> specification for Element_Put' referring to the line above where I
> make the new package IntSelectionP. I can't see what i've done wrong.
>
> Also, is my code correct if my purpose is to use the package to create
> arrays of different elements (integer, character, etc) and use the
> procedures Find_Min and Sort and Print on them?

For these types you should be fine.  For more complex types you may
need to define "<" and "=" operators.

George.

>
> Thanks