From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-03-01 10:53:41
----- Original Message -----
From: "Douglas Gregor" <gregod_at_[hidden]>
Sent: Friday, March 01, 2002 10:37 AM
Subject: Re: [boost] Re: New version of valunion and stack_allocator
> On Friday 01 March 2002 10:28 am, you wrote:
> > Nice. Shouldn't we also be checking that the alignment of T is <= align,
> > just to be sure?
> > -Dave
> Brian Parker's version has this note in it:
> (Note that ISO C++ guarantees that a type cannot have an alignment >
> its size as it needs to be able to be packed into arrays without padding
> between elements).
> Which would say that the additional check isn't needed. But it doesn't
> so we might as well add it.
If it's redundant it costs compilation time.
I guess what I meant was that it probably makes more sense to check for
aligmnent_of<T> <= align in place of sizeof<T> <= align. If you want to
ensure the right number of bytes, stick an array of char in the union like I
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