From: "Ayende Rahien" <Dont@spam.me>
Subject: Re: Problem trying to implement generics.
Date: Thu, 12 Apr 2001 15:15:45 +0200
Date: 2001-04-12T15:15:45+02:00 [thread overview]
Message-ID: <9b46dr$cd8$1@taliesin.netcom.net.uk> (raw)
In-Reply-To: zJ7B6.11026$ix4.8084250@news1.rdc1.sfba.home.com
<tmoran@acm.org> wrote in message
news:zJ7B6.11026$ix4.8084250@news1.rdc1.sfba.home.com...
> >I've just started to learn Ada, and I've some problem solving some
problems.
> If you are learning in a course, asking the instructor will be much
> faster than asking here. Assuming you are trying to learn just from
> a book:
I'm learning from a book.
> >Here is the error:
> >bintree.adb: Error: line 43 col 25 LRM:8.4(1), Binary operator ">"
between
> Without seeing line 43 (or any lines) of bintree.adb it's a little
> hard to see what's going on, but, as the compiler suggests, a "use"
> or "use type" might be what you need.
Here is the line:
if current.sorted_by > sort then
What does use type does? How do I use it?
> >procedure insert(insert_this : in data_type; Sort : in sort_by) is
> >Here is the error this line produce:
> >bintree.adb: Error: line 107 col 12 LRM:3.11.1(7), subprogram body is a
> >homograph of another subprogram which does not require a completion,
> That sounds like you have two different "insert" subroutines which
> look the same in calling parameters so if the compiler saw
> insert(a,b);
> it wouldn't know which one to call.
Yes, I found & fixed it, thanks.
> >bintree.adb: Error: line 150 col 18 LRM:3.10.2(23&31), The prefix to
'ACCESS
> >must be either an aliased view of an object or denote a subprogram with a
> Like the message says, the thing before 'access must be aliased. Given
> type node is record
> Data : Data_type;
> ...
> type node_access is access all Node;
> ...
> result : node_access ...
> ... result.data'access;
> you see that "result.data" is defined as not aliased. Try
> Data : aliased Data_type;
That solved the problem, but why? What does aliased mean?
> >Also I've a trouble using Root variable in a function that is undefied in
> Is the Root variable defined before the function that uses it?
Yes, it's defined here:
type Binary_Tree is new Ada.Finalization.controlled with record
root: Node_access := null;
end record;
Which is on the ads file, and other functions doesn't seem to have trouble
finding it.
The only thing I can think of is that this doesn't work because the function
is not declared on the ads file.
next prev parent reply other threads:[~2001-04-12 13:15 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-11 15:04 Problem trying to implement generics Ayende Rahien
2001-04-12 1:41 ` tmoran
2001-04-12 13:15 ` Ayende Rahien [this message]
2001-04-12 18:15 ` tmoran
2001-04-13 11:18 ` Ayende Rahien
2001-04-13 10:35 ` chris.danx
2001-04-13 11:54 ` Ayende Rahien
2001-04-13 11:49 ` chris.danx
2001-04-13 23:03 ` Ayende Rahien
2001-04-13 23:01 ` Robert A Duff
2001-04-14 0:05 ` Brian Rogoff
2001-04-14 1:12 ` Ayende Rahien
2001-04-14 1:44 ` Brian Rogoff
2001-04-14 14:03 ` Dmitry A. Kazakov
2001-04-14 16:30 ` Ayende Rahien
2001-04-14 16:28 ` Michael Erdmann
2001-04-15 3:27 ` James Rogers
2001-04-15 12:20 ` Ayende Rahien
2001-04-15 14:09 ` Dmitry A. Kazakov
2001-04-15 18:22 ` tmoran
2001-04-15 13:48 ` Dmitry A. Kazakov
2001-04-15 20:44 ` Ayende Rahien
2001-04-16 14:34 ` Dmitry A. Kazakov
2001-04-14 1:33 ` Robert A Duff
2001-04-17 8:50 ` Jean-Pierre Rosen
2001-04-17 13:20 ` Tucker Taft
2001-04-17 16:51 ` Ayende Rahien
2001-04-17 17:16 ` Larry Hazel
2001-04-17 18:11 ` Brian Rogoff
2001-04-17 19:10 ` Marin David Condic
2001-04-17 21:08 ` Brian Rogoff
2001-04-18 15:16 ` Chad R. Meiners
2001-04-18 16:33 ` Marin David Condic
2001-04-17 21:09 ` chris.danx
2001-04-17 21:11 ` chris.danx
2001-04-17 21:17 ` chris.danx
2001-05-08 5:40 ` Lao Xiao Hai
2001-05-11 9:43 ` John English
2001-05-12 19:16 ` Lao Xiao Hai
2001-04-17 19:32 ` Larry Hazel
2001-04-17 21:03 ` Ayende Rahien
2001-04-18 15:48 ` Brian Rogoff
2001-04-20 12:34 ` Georg Bauhaus
2001-04-20 12:42 ` Lutz Donnerhacke
2001-04-20 12:45 ` Lutz Donnerhacke
2001-04-20 19:48 ` Brian Rogoff
2001-04-20 20:36 ` David Starner
2001-04-20 23:02 ` Robert A Duff
2001-04-23 2:45 ` Brian Rogoff
2001-04-24 1:15 ` Robert A Duff
2001-04-24 2:00 ` Brian Rogoff
2001-04-24 15:12 ` Georg Bauhaus
2001-04-24 15:09 ` Georg Bauhaus
2001-04-24 18:36 ` Marius Amado Alves
2001-04-19 13:08 ` Larry Kilgallen
[not found] ` <9bi4g4$97m$1@nh.pace.Organization: LJK Software <YlSyXUaQmD+$@eisner.encompasserve.org>
2001-04-19 14:20 ` Marin David Condic
2001-04-18 5:34 ` Mike Silva
2001-04-18 16:55 ` Ray Blaak
2001-04-24 16:00 ` Tucker Taft
2001-04-12 13:57 ` Andy
2001-04-13 6:34 ` Simon Wright
2001-04-13 11:11 ` Ayende Rahien
2001-04-12 18:06 ` Stephen Leake
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