Re: [Boost-Users] UBLAS: advice on argument types please

From: jhr.walter_at_[hidden]
Date: 2003-02-25 03:59:09

Hi Roland,

you wrote:

> I am trying to find a good choice for argument types to a function.
>
> (Please be patient, I am a poor user of C++ who has not yet 
> understood all this expression template magic.)
> 
> I'd like to have a function:
> 
> void foo( whattype arg) {
> }
> 
> matrix<double> m(3,3);
> vector<double> v(6);
> 
> and call it like:
> 
> foo(m.column(0));
> foo(m.row(0));
> foo(v);
>
> Is this feasible? 

I'd tend to use

template<class E>
void foo (vector_expression<E> &arg);

or

template<class E>
void foo (const vector_expression<E> &arg);

> Should I use iterators for whattype? 

Unsure about that.

> (how do I 
> access size information then?) 

it ().size ();

> Am I trying to misuse the ublas when 
> asking such a question? 

Nope.

> (Which container should I use in this case?)

No need to copy yet.

> In the hope anyone can shade some light on it.

HTH,

Joerg