From: echancrure@gmail.com
Subject: worrying behaviour
Date: Fri, 2 May 2008 08:26:14 -0700 (PDT)
Date: 2008-05-02T08:26:14-07:00 [thread overview]
Message-ID: <af1298c2-fa66-4e25-b387-68b9bb02e55b@m3g2000hsc.googlegroups.com> (raw)
After the discussion on static expressions etc.
I came up against this problem which I thought was initially related
to it but probably not.
let's say I have:
with Ada.Text_IO; use Ada.Text_IO;
with ints;
procedure static is
function "-"(L, R : ints.My_Int) return ints.My_int renames
ints."-";
function "-"(L : ints.My_Int) return ints.My_int renames ints."-";
Y : constant ints.My_int := -1;
Z : constant ints.My_int := 1-1;
begin
Put_Line (ints.My_Int'Image (Y) & ints.My_Int'Image (Z));
end static;
and
package ints
is
type My_Int is range -100..100;
function "-" (L, R : My_Int) return My_int;
end ints;
package body ints
is
function "-" (L, R : My_Int) return My_Int
is
begin
return 42;
end "-";
end ints;
So basically, I have forgotten to define unary "-" in the the ints
package.
gnat does not complain and the .exe returns '-1 42' as would be
expected without the unary - rename.
Here however I have renamed the unary - to something that does not
exist.
Surely an error should be generated here. Otherwise this is very
dangerous behaviour.
Please enlight me.
next reply other threads:[~2008-05-02 15:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-02 15:26 echancrure [this message]
2008-05-02 15:54 ` worrying behaviour Adam Beneschan
2008-05-02 17:41 ` echancrure
2008-05-02 18:31 ` Adam Beneschan
2008-05-03 1:15 ` Randy Brukardt
2008-05-03 2:04 ` Adam Beneschan
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