[Dune] [#800] implement operator*( K, FieldVector< K, SIZE > )

[Dune]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Martin Nolte (nolte) 

Attached to Project - Dune
Summary - implement operator*( K, FieldVector< K, SIZE > )
Task Type - Feature Request
Category - Common
Status - New
Assigned To - 
Operating System - Unspecified / All
Severity - Low
Priority - Normal
Reported Version - SVN (pre2.1)
Due in Version - Undecided
Due Date - Undecided
Details - There is an operator+( FieldVector< K, SIZE >, FieldVector< K, SIZE > ). Is there any reason that
operator*( K, FieldVector< K, SIZE > ) and its variants are not implemented?

If there is none, I suggest to add the following code to fvector.hh, if expression templates are not available:

  template< class K, int SIZE >
  FieldVector< K, SIZE > operator* ( const K &k, const FieldVector< K, SIZE > &v )
  {
    FieldVector< K, SIZE > w( v );
    return w *= k;
  }

  template< class K, int SIZE >
  FieldVector< K, SIZE > operator* ( const FieldVector< K, SIZE > &v, const K &k )
  {
    FieldVector< K, SIZE > w( v );
    return w *= k;
  }

  template< class K, int SIZE >
  FieldVector< K, SIZE > operator/ ( const FieldVector< K, SIZE > &v, const K &k )
  {
    FieldVector< K, SIZE > w( v );
    return w /= k;
  }

More information can be found at the following URL:
http://www.dune-project.org/flyspray/index.php?do=details&task_id=800

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