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From: bdbryant@mail.utexas.edu (Bobby D. Bryant)
Newsgroups: comp.lang.ada
Subject: Re: creating own Image function
Date: Wed, 29 Dec 2004 17:06:25 +0000 (UTC)
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On Wed, 29 Dec 2004, "R" <ruthless@poczta.onet.pl> wrote:

> Hello.
> 
> I've written my own Image function it's sth like Java's toString.
> 
> function Image(this: rec1) return String is
> tmp : String(1..26);
> begin
> tmp := "The value of field is:" & Integer'Image(Get(this));
> return tmp;
> end Image;
> 
> when I use it:
> 
> testclass.Create(object, 100); -- note 100 is 3 digits = 3 Characters
> Put(testclass.Image(object));
> 
> then I can see "The value of field is: 100"
> when I initiate my object with 10 - 2 digits = 2 Characters
> an exception is raised:
> CONSTRAINT_ERROR : testclass.adb:34 length check failed
> 
> it's because tmp: Sting has it's fixed length can it be more flexible?
> 
> When I tried with String(1..100) the same effect
> users can initate their objects with 1, 11, 111, 111111 and so on.
> 
> so my question is: can I write(with Your help of course) a function
> flexible to handle all those situations?


I think you can declare tmp as -

   tmp : String := "The value of field is:" & Integer'Image(Get(this));


For that matter, I think you can skip the declaration and just do -

   return "The value of field is:" & Integer'Image(Get(this));

as the body of your function.


-- 
Bobby Bryant
Austin, Texas