Re: Q re pack & aliased

[Vinzent Hoefler <ada.rocks@jlfencey.com>]

tmoran@acm.org wrote:

>|   x : bunches (1 .. 10);
>|   for x'Size use 240;
>  Unfortunately, one rarely knows the width of an image file at
>compile time.

Yes, of course.

I just left it in to make sure the compiler does what it should do
even for the array. It doesn't really matter.

>  What does your program print with and without
>the "for x'Size use 240;"?

The same, it says "3 = ...". As it should. It makes no difference
either if the attribute is specified or not.

>  I'm sorry if that wasn't clear.  My "24-bit-type" is indeed
>a record, just like your example.  The sole difference is the
>addition of a specific layout for the color components:
>    for Triple_Color_Type use record
>        Blue  at 0 range 0 .. 7;
>        Green at 1 range 0 .. 7;
>        Red   at 2 range 0 .. 7;
>    end record;

Well, now it gets strange.

I just tried that and added the representation clause to the example
code I posted. It still compiles without any warning and seems to
generate the correct code, too.

I just tried it on both 3.15p for Windows and Linux.

But with your examplary 24-bit-type you used before both versions
(3.14 for Windows and 3.15 Win/Linux) showed the problem exactly as
you described here.


Vinzent.

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