Re: [Boost-users] smart pointer declaration question

From: Jack Nguyen (bluekite2000_at_[hidden])
Date: 2005-06-17 13:19:28

Its a matrix constructor using pointer indirection. User can then do
Matrix<double> M(3,4)//;
and 2 arrays will be created, array1 of type *T, size 4 and array2 of
type T, size 3*4. array1[0] points to array2[0], array1[1] points to
array2[3] so on and so forth. I m having syntax trouble accomplishing
the "array1[1] points to array2[3]" part!

On 6/17/05, Doug Henry <brilligent_at_[hidden]> wrote:
> It is really hard to tell what you are trying to do from this example. 
> Could you provide an example or description (not necessarily code) of what
> your matrix structure should look like.
>  
> 
> 
> On 6/17/05, Jack Nguyen <bluekite2000_at_[hidden]> wrote:
> > 
> > I m trying to build a matrix and m having compile error w/ thei following
> codes
> >         mpD=boost::shared_array<boost::shared_array<T>
> >(new
> > boost::shared_array<T>[cols]);
> >         mpD[0]=boost::shared_array<T>(new T[rows*cols]); 
> >         for (int i=1; i<cols;i++)
> >             mpD[i]=mpD[0]+i*rows;
> > Seems like there s no match for operator+
> > Regards,
> > 
> > On 6/16/05, Cory Nelson <phrosty_at_[hidden] > wrote:
> > > mpD=boost::shared_array<T>(new T[size]);
> > >
> > > On 6/16/05, Jack Nguyen <bluekite2000_at_[hidden]> wrote:
> > > > I currently have 
> > > >
> > > > template <typename T>
> > > > class  Vector
> > > > {
> > > >  private:
> > > >   int Size;
> > > >   boost::shared_array<T> mpD;
> > > >
> > > >   void VecAlloc( int size) 
> > > >   {
> > > >
> > > >       boost::shared_array<T> mpD_temp(new T[size]);
> > > >       mpD=mpD_temp;
> > > >   }
> > > >
> > > >  public:
> > > >   Vector()
> > > >       { 
> > > >       }
> > > >   Vector(int size)
> > > >       :Size(size)
> > > >       {
> > > >           VecAlloc(size);
> > > >       }
> > > > }
> > > >
> > > >
> > > > My question is how do i get rid of boost::shared_array<T> mpD_temp(new
> > > > T[size]); ???
> > > >
> > > > _______________________________________________
> > > > Boost-users mailing list
> > > > Boost-users_at_[hidden] 
> > > >
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
> > > >
> > >
> > >
> > > --
> > > Cory Nelson
> > > http://www.int64.org
> > >
> > > _______________________________________________
> > > Boost-users mailing list
> > > Boost-users_at_[hidden]
> > > http://lists.boost.org/mailman/listinfo.cgi/boost-users
> > >
> > 
> > _______________________________________________
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> > 
> 
>  
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