What exactly is the ' operator

What exactly is the ' operator

[matthias_k]

Hello,

I can't find the specifics about the mysterious ' operator, which 
purpose seems to access certain attributes of a datatype.
However I've seen it being used in the most various situations, so I was 
wondering what exactly it is used for, how it is called, etc.

Furthermore, can I define my own '-operations?

Thanks in advance,
Matthias

Re: What exactly is the ' operator

[Marius Amado Alves]

matthias_k wrote:
> I can't find the specifics about the mysterious ' operator, which 
> purpose seems to access certain attributes of a datatype.

It's not an operator, and there's nothing mysterious about it. It's just 
the notation for attributes. All attributes are listed on the RM. Annex K.

If by "datatype" you mean type, note that other entities also have 
attributes, e.g. objects, tasks.

> Furthermore, can I define my own '-operations?

No.

Re: What exactly is the ' operator

[matthias_k]

Marius Amado Alves wrote:
> matthias_k wrote:
> 
>> I can't find the specifics about the mysterious ' operator, which 
>> purpose seems to access certain attributes of a datatype.
> 
> 
> It's not an operator, and there's nothing mysterious about it. It's just 
> the notation for attributes. All attributes are listed on the RM. Annex K.
> 
> If by "datatype" you mean type, note that other entities also have 
> attributes, e.g. objects, tasks.
> 
>> Furthermore, can I define my own '-operations?
> 
> 
> No.
> 

Thanks. Does "it" have a name then? If it's not an operator, I can't 
call it '-operator. I have to refer to it somehow in my article.

Re: What exactly is the ' operator

[Marius Amado Alves]

> Thanks. Does "it" have a name then?

Yes: tick.

Re: What exactly is the ' operator

[stephane richard]

"Marius Amado Alves" <amado.alves@netcabo.pt> wrote in message 
news:mailman.212.1097059129.390.comp.lang.ada@ada-france.org...
>> Thanks. Does "it" have a name then?
>
> Yes: tick.
>
I'll take that :-)...much shorter than my suggestion. 

Re: What exactly is the ' operator

[Jeffrey Carter]

Marius Amado Alves wrote:

>> Thanks. Does "it" have a name then?
> 
> Yes: tick.

"Tick" is how it's pronounced: X'Size is spoke as "X Tick Size". 
"Attribute notation" is probably a good name. ARM 4.1.4 ("Attributes") 
uses "attribute_reference"

attribute_reference ::= prefix'attribute_designator

The apostrophe is also used for character literals.

-- 
Jeff Carter
"Death awaits you all, with nasty, big, pointy teeth!"
Monty Python & the Holy Grail
20

Re: What exactly is the ' operator

[Georg Bauhaus]

Jeffrey Carter <spam@spam.com> wrote:
: Marius Amado Alves wrote:
: 
:>> Thanks. Does "it" have a name then?
:> 
:> Yes: tick.
: 
: "Tick" is how it's pronounced: X'Size is spoke as "X Tick Size". 

I've also read that it can be read as a genitive :-)

Re: What exactly is the ' operator

[stephane richard]

"matthias_k" <nospam@digitalraid.com> wrote in message 
news:ck0hm6$3jg$01$1@news.t-online.com...
>
> Thanks. Does "it" have a name then? If it's not an operator, I can't call 
> it '-operator. I have to refer to it somehow in my article.

Apostrophe ? ;-)  sorry I just couldn't resist hehehe!

I'd like to know it's name if there is one actually, I've been wondering 
about it too :-) 

Re: What exactly is the ' operator

[Martin Krischik]

Marius Amado Alves wrote:

> matthias_k wrote:
>> I can't find the specifics about the mysterious ' operator, which
>> purpose seems to access certain attributes of a datatype.
> 
> It's not an operator, and there's nothing mysterious about it. It's just
> the notation for attributes. All attributes are listed on the RM. Annex K.
> 
> If by "datatype" you mean type, note that other entities also have
> attributes, e.g. objects, tasks.
> 
>> Furthermore, can I define my own '-operations?
> 
> No.

But you can defined the value behind the tick:

For X'Size use 32; -- thats bit

OF corse not for all values.

With Regards

Martin

-- 
mailto://krischik@users.sourceforge.net
http://www.ada.krischik.com