From: dennison@telepath.com
Subject: Re: help: String Sets in ADA???
Date: 1998/09/25
Date: 1998-09-25T00:00:00+00:00 [thread overview]
Message-ID: <6ugfd0$7tn$1@nnrp1.dejanews.com> (raw)
In-Reply-To: 360B9AFA.1F99D1CD@ios.chalmers.se
In article <360B9AFA.1F99D1CD@ios.chalmers.se>,
Arash Vahidi <vahidi@ios.chalmers.se> wrote:
Having troube with our homework, are we? :-)
> Here is my code, but lloks like I get Cosntraint_Error as soon as I make
> an assigment (see the code).
...
> type Node is record
> Object : String( 1..1024 );
> -- Object : String_Pointer;
> Next : Node_Pointer;
> end record;
...
> procedure Insert( Object : in String) is
> Tmp : Node_Pointer;
> begin
...
> First.Object := object;
This line ^^^^^^^^^^^^^^^^^^^^^^^ will raise a constraint error if the string
passed in to Insert isn't *exactly* 1024 characters long. You could change it
to:
First.Object(1..Object'length) := Object;
If you want the rest of the string blanked out, you could add another line:
First.Object (Object'length + 1..First.Object'last) := (others => ' ');
The problem with all this is that after the call you don't have any way of
finding out how many characters in a node's object contain valid data. I'd
suggest looking into using the type Ada.Strings.Unbounded.Unbounded_String
instead of String(1..1024).
--
T.E.D.
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next prev parent reply other threads:[~1998-09-25 0:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-09-25 0:00 help: String Sets in ADA??? Arash Vahidi
1998-09-25 0:00 ` dennison [this message]
1998-09-25 0:00 ` Bob Fletcher
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