The great inapplicable attribute debate
Stewart Gordon
smjg_1998 at yahoo.com
Mon Apr 13 05:53:32 PDT 2009
Frits van Bommel wrote:
> Kagamin wrote:
<snip>
>> Such mood was always in the spec: "AlignAttribute is ignored when
>> applied to declarations that are not structs or struct members".
>
> I never saw that before. So it doesn't work for class members?
http://www.digitalmars.com/d/1.0/class.html
"The D compiler is free to rearrange the order of fields in a class to
optimally pack them in an implementation-defined manner. Consider the
fields much like the local variables in a function - the compiler
assigns some to registers and shuffles others around all to get the
optimal stack frame layout. This frees the code designer to organize the
fields in a manner that makes the code more readable rather than being
forced to organize it according to machine optimization rules. Explicit
control of field layout is provided by struct/union types, not classes."
> And it
> won't change the alignment of unions if applied to union members (by
> changing the maximum alignment of the members)?
I'm not sure what you mean....
But there seem to be a few issues with the behaviour of align. I'll
have to investigate....
Stewart.
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