From: Michael Stevens (mail_at_[hidden])
Date: 2005-06-23 12:33:51
On Thursday 23 June 2005 17:04, Marc Duflot wrote:
> I see that there is some discussion about the initialization to zero of
> vector elements and I understand that the default behaviour is to left
> them uninitialized (even if the documentation claims that 'Elements are
> zeroed by default' in the overview).
> Is there a way to change this behaviour with a macro, a template
> parameter or something else?
> I simply want to have this:
> typedef boost::numeric::ublas::??? my_vector_type;
> my_vector_type my_vector(1);
> assert (my_vector==0.0);
my_vector_type<double> my_vector ( zero_vector<double>(1) );
my_vector_type my_vector(1); my_vector.clear ();
The latter is more efficient.
Some people like the syntax of zero_vector. To me it seems the additional
<double> is ugly. I think we could easily hide this by making the default
template parameter 'int'. This could apply to all the zero_ scalar_ and unit_
types. What do people think?
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