CFD Online Discussion Forums - Pointer Initialization

Hi,

I am still new in OpenFOAM and I'm having issues initializing a pointer of the type autoPtr<scalar>&.

I declared a protected variable and a public function to access the value it is gonna point to in functions that belong to other classes

Code:

autoPtr<scalar>& BtTrans_;



inline autoPtr<scalar>& BtTrans();

BtTrans() is defined as follows:

Code:

template<class CloudType>

inline Foam::autoPtr<Foam::scalar>&

Foam::MyEvaporationAS<CloudType>::BtTrans()

{

    return BtTrans_;

}

Now in the constructor of my class I wanted to initialize BtTrans_ like so:

Code:

BtTrans_(NULL)

Code:

BtTrans_(0.0)

Dont work and I get the following error message:

error: invalid initialization of non-const reference of type `Foam::autoPtr<double>&’ from an rvalue of type ‘double’

Maybe one of you can help me with his/her thoughts on this issue?!

Thanks so much,
Stef

EDIT:

I've found the error. The declaration of BtTrans_ was incorrect. Should have been:

Code:

autoPtr<scalar> BtTrans_;

Now I have issues assigning the pointer to the variable I want it to point to.

How do I do that correctly?

Code:

template<class CloudType>

void Foam::MyEvaporationAS<CloudType>::calculate(...) const

{

   Bt= 5.0;

   BtTrans_ = &Bt;



}

The error I'm getting is the following:

error: no match for ‘operator=’ in ‘((const Foam::MyEvaporationAS<Foam::ReactingCloud<Foam::Th ermoCloud<Foam::KinematicCloud<Foam::Cloud<Foam::R eactingParcel<Foam::ThermoParcel<Foam::KinematicPa rcel<Foam::particle> > > > > > > >*)this)->Foam::MyEvaporationAS<Foam::ReactingCloud<Foam::T hermoCloud<Foam::KinematicCloud<Foam::Cloud<Foam:: ReactingParcel<Foam::ThermoParcel<Foam::KinematicP arcel<Foam::particle> > > > > > > >::BtTrans_ = & Bt’