From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: Textedit and txt
Date: Wed, 6 May 2015 16:23:35 -0500
Date: 2015-05-06T16:23:35-05:00 [thread overview]
Message-ID: <mie0on$39l$1@loke.gir.dk> (raw)
In-Reply-To: 51c639dd-a48c-4130-becd-750cb23094da@googlegroups.com
<brbarkstrom@gmail.com> wrote in message
news:51c639dd-a48c-4130-becd-750cb23094da@googlegroups.com...
On Sunday, April 26, 2015 at 7:52:05 AM UTC-4, Laurent wrote:
>> Thanks for the hint. Why hide that in the preferences? Apple has
>> sometimes strange ideas. Terminal an pico works too. Not really a fan of
>> emacs/aquamacs. Tried once to learn mozart oz as language and they used
>> emacs as ide. Didn't really work for me so I gave up.
>I'd suggest taking a look at the Reference Manual section on
>the Bounded_Strings package. You can create a default Bounded_String
>length in a package (say named Common_Defs.ads) using
>
> Std_Vstring_Length : constant := 256;
> package VString is new
> Ada.Strings.Bounded.Generic_Bounded_Length(Std_Vstring_Length);
On top of this suggestion, I'd suggest defining the conversion operator (AKA
unary plus) appropriately:
function "+" (Right : VString.Bounded_String) return String renames
VString.To_String;
function "+" (Right : String) return VString.Bounded_String renames
VString.To_Bounded_String;
Then you can write:
Ada.Text_IO.Put_Line ("read code: "
& (+Temp_Record.Code_SIL));
instead of:
Ada.Text_IO.Put_Line ("read code: "
& Codes.To_String (Temp_Record.Code_SIL));
Note that some people hate using "+" this way, because they think it has
something to do with numerics. We really should have something non-specific
(say an operator "#"), but the ARG is always split between people that think
we already have such an operator ("+") and thus we don't need another one
and those that are repulsed by using "+" this way. (Getting these put into
the packages themselves failed for similar reasons. Grumble.)
In any case, I think Bounded_String and Unbounded_String are unusable
without these definitions. So you either have to swallow "+" or forget the
packages altogether. Neither is appealing. (I'd prefer a completely
different design for both of these packages, so we could add some mechanism
to allow direct conversions, but that's likely too radical.)
Randy.
next prev parent reply other threads:[~2015-05-06 21:23 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-24 21:40 Annoying behavior Laurent
2015-04-25 4:31 ` gautier_niouzes
2015-04-25 6:51 ` Laurent
2015-04-25 4:50 ` Niklas Holsti
2015-04-25 7:15 ` Laurent
2015-04-25 8:10 ` Niklas Holsti
2015-04-25 15:37 ` Laurent
2015-04-25 13:54 ` Stephen Leake
2015-04-25 15:46 ` Laurent
2015-04-25 17:02 ` Simon Wright
2015-04-25 17:41 ` Niklas Holsti
2015-04-25 18:58 ` Laurent
2015-04-25 19:30 ` Georg Bauhaus
2015-04-25 20:13 ` Laurent
2015-04-25 21:46 ` Laurent
2015-04-25 23:16 ` Bob Duff
2015-04-26 10:38 ` Jedi Tek'Unum
2015-04-26 11:52 ` Textedit and txt Laurent
2015-04-26 13:21 ` brbarkstrom
2015-05-06 21:23 ` Randy Brukardt [this message]
2015-05-07 21:12 ` Laurent
2015-05-07 21:48 ` Simon Wright
2015-05-07 22:24 ` Laurent
2015-05-08 5:50 ` Simon Wright
2015-05-08 7:35 ` Laurent
2015-05-08 23:35 ` Randy Brukardt
2015-05-09 19:25 ` Laurent
2015-05-09 21:36 ` Anh Vo
2015-05-11 17:00 ` Shark8
2015-05-11 17:49 ` Dmitry A. Kazakov
2015-05-09 15:23 ` brbarkstrom
2015-05-12 1:10 ` Randy Brukardt
2015-05-12 12:44 ` brbarkstrom
2015-05-12 21:57 ` Randy Brukardt
2015-05-13 12:07 ` brbarkstrom
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