From: Shark8 <OneWingedShark@gmail.com>
Subject: Re: What does this code mean?
Date: Wed, 07 Jan 2015 21:37:08 -0700
Date: 2015-01-07T21:37:08-07:00 [thread overview]
Message-ID: <XPnrw.219077$pr4.10387@fx26.iad> (raw)
In-Reply-To: <68ac5df1-21ab-4b8e-acae-819c78fe8536@googlegroups.com>
On 07-Jan-15 20:53, John Smith wrote:
>
> My question is why is this code written this way?
> Is it just plain wrong or am I missing some concept that the author(s)
> tried to get across that I'm missing?
>
I think it's wrong -- the "package I_IO is new Ada (Short);" is syntax
for instantiating a generic package... noticing the space-comma, I think
there might have been a transcription error -- it is likely this is what
was meant:
With Ada.Text_IO;
procedure Convert_Checked is
type Short is range -128 .. +127;
type Byte is mod 256;
package T_IO renames Ada.Text_IO;
package I_IO is new Ada.Text_IO.Integer_IO (Short);
package M_IO is new Ada.Text_IO.Modular_IO (Byte);
A : Short := -1;
B : Byte;
begin
B := Byte (A); -- range check will lead to Constraint_Error
T_IO.Put("A = ");
I_IO.Put(Item => A,
Width => 5,
Base => 10);
T_IO.Put(", B = ");
M_IO.Put(Item => B,
Width => 5,
Base => 10);
end Convert_Checked;
next prev parent reply other threads:[~2015-01-08 4:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-08 3:53 What does this code mean? John Smith
2015-01-08 4:37 ` Shark8 [this message]
2015-01-08 9:13 ` Simon Wright
2015-01-08 16:44 ` Dirk Heinrichs
2015-01-08 18:42 ` AdaMagica
2015-01-08 18:45 ` AdaMagica
2015-01-10 21:37 ` John Smith
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