PATCH: option to silence warnings about offsetof and non-PODs

[Phil Edwards]

On Thu, May 15, 2003 at 01:58:56PM -0700, Matt Austern wrote:
> The warning message is of course correct, and one could even argue that 
> it should be a hard error.  Applying offsetof to a non-POD is 
> undefined.  However, there are also a lot of cases where "POD" is too 
> strict a concept, where the offset of a data member is well defined and 
> the restriction is purely artificial.  (I've raised this issue with the 
> C++ standards committee, and there's general agreement that "POD" was 
> chosen mostly for simplicity rather than because it's essential to the 
> notion of offsets.)  Applying offsetof to simple non-POD types, such as 
> a simple struct with a constructor, is common.  Users who are aware 
> that they're writing nonportable code, and who have deliberately chosen 
> to ignore the warning about it, should be able to do so.

Could perhaps some of this be included in the documentation paragraph?


Phil

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