Re: [eigen] Quaternion and expression template

[Mathieu Gautier <mathieu.gautier@xxxxxx>]

Hauke Heibel a écrit :
> Ok, I know what you mean. Then just to get things right we might try the 
> following when explicitly defining the destructor.
>
> According to 15.4.13 Exception specifications, the implicitly generated 
> destructor will be tagged as throw() (i.e. it does not throw) when all 
> used destructors are tagged with throw(). This seems to be the case for 
> Matrix (only in some cases). Let's take a look. MatrixBase and 
> ei_special_scalar_op_base have implicitly generated destructors and no 
> data and thus their destructors will be tagged with throw(). So none of 
> the base classes may prevent the Matrix destructor from being tagged 
> with throw(). The only class we are depending on is ei_matrix_storage. 
> Here, fixed size matrices and the null matrix have implicitly generated 
> destructors and thus they will be tagged with throw() and consequently 
> Matrix's implicitly generated destructor would be tagged with throw().

Yes, I didn't talk about this point in my previous mail, but declaring 
the destructor of Test as :

inline ~Test() throw() {}

didn't modify the assembly. The code is not inlined. So, the link 
between rvo, exception handling and the explicit destructor is not 
clear, and I don't know how where to look.

--
Mathieu