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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 2Mar2001, 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.
jwe

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