Re: ANN: Ada 2005 Math Extensions, 20100810 release

["Yannick Duchêne (Hibou57)" <yannick_duchene@yahoo.fr>]

Le Fri, 13 Aug 2010 08:27:52 +0200, Dmitry A. Kazakov  
<mailbox@dmitry-kazakov.de> a écrit:
>> In other places I've tacked _G on the end of the 'obvious' name:
>>
>>    generic
>>    package ColdFrame.Events_G.Standard_G.Callback_Manager_G is
>>
>> and I saw someone else (Ludovic?) doing the same here recently.
>
> I used plural suffix 's' before, but it Generic is clearer and it seems
> like a semi-standard now.

You mean the _G suffis became a somewhat de-facto standard ?

> Yes, especially because of two "Extensions". I had immense problems with
> names. Look at this:
>
>    http://www.dmitry-kazakov.de/ada/fuzzy_packages.gif
Will have to look at it again, as I did not really understand this one.

> Another rule of thumb (I don't know if this is going to be fixed in Ada
> 2012), is that a child should always rename formal generic arguments in  
> its
> specifications. Under certain circumstances, usually in children, they
> might become unavailable. I mean this:
>
> generic
>    with package P is new Generic_P (<>);
> package Generic_S is
>    package P_Of renames P; -- You will need this!
>
> Sometimes you need to "rename" formal types as well:
>
> generic
>    type Foo is ...
> package Generic_S is
>    subtype Foo_Of is Foo; -- What a mess!

We already talked about these cases. Do you remember the thread's title ?  
(I would like to get it back to read it again).


-- 
There is even better than a pragma Assert: a SPARK --# check.
--# check C and WhoKnowWhat and YouKnowWho;
--# assert Ada;
--  i.e. forget about previous premises which leads to conclusion
--  and start with new conclusion as premise.