Re: calenday (was Re: IBM Acquires Rational Ada

[Karel Miklav <karel@inetis.spppambait.com>]

Is there a package or something to work with locales in Ada (like in C, 
you know :) )?


Grein, Christoph wrote:
> RM 13.4(8) For nonboolean enumeration types, if the coding is not specified for 
> the type, then for each value of the type, the internal code shall be equal to 
> its position number.
> 
> So your proposal is superfluous.
> 
> And there is no global agreement whether the week starts with Sunday or Monday. 
> Historically, it starts with Sunday, but there are countries where it starts 
> with Monday.
> 
> 
>>>>>type day_name_type is (mon,tue,wed,thu,fri,sat,sun);
>>>>>
>>>>>Add a representation clause to guarantee that the values
>>>>>start with sun => 0, mon => 1 etc.  For some code, it is
>>>>>much easier to work with the day of the week in the form
>>>>>of a number.
>>>>
>>>>I'm puzzled by this advice.
>>>>
>>>>day_name_type'Pos(mon) .. day_name_type'Pos(sun)
>>>>
>>>>is necessarily 0 .. 6, is it not?
>>>>
>>>
>>>Yes, the _pos_ attribute is defined by the language as you state,
>>>but Warren is looking to have the _representation_ specified in
>>>the package specification.  This insures that instantiations of
>>>Ada.Unchecked_Conversion between day_name_type and
>>>integer types produce specified results.
>>>
>>
>>Yes, but if what you want is "to work with the day of the week in
>>the form of a number", why use Unchecked_Conversion when
>>day_name_type'Pos does what you want without further ado?