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Re: new types and INSTALL_BINOP

From: John W. Eaton
Subject: Re: new types and INSTALL_BINOP
Date: Fri, 2 Mar 2001 23:20:21 -0600

On  2-Mar-2001, Francesco Potorti` <address@hidden> wrote:

|    | I have conversion methods for this, eg:
|    |    Matrix octave_sparse::matrix_value (bool = false) const {
|    |       Matrix M= oct_sparse_to_full( X );
|    |       return M;
|    |    }
|    (I'd write the body of this function as just
|      return oct_sparse_to_full (X);
|    since there is no need to have the declaration/initialization
|    statement here.)
| Maybe  I am  completely wrong,  but why  not simply  using  a conversion
| operator?  Sorry if the syntax is  incorrect, I have not used this for a
| long time:
| octave_sparse::operator Matrix() { return oct_sparse_to_full(this); }

Yes, defining a conversion operator might be useful for C++ code, but
that will not enable the Octave interpreter to perform type
conversions.  For that, you need to define the conversion operations
as I outlined.


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