[Coin-lpsolver] Packed Matrix to CbcModel

[Kyle Ellrott]

That lead to a weirder error message.

Both
cbc_model->assignSolver( (OsiSolverInterface*) si );
and
cbc_model->assignSolver( dynamic_cast<OsiSolverInterface*>(si) );

get

../../../open_prospect/src/intpro_threading/intpro_threading.cc:379:  
error: no matching function for call to 'CbcModel::assignSolver 
(OsiSolverInterface*)'
/Users/kye/CvsWork/COIN//include/CbcModel.hpp:1316: note: candidates  
are: void CbcModel::assignSolver(OsiSolverInterface*&, bool)

I forget the details of using '&' in the function declaration.  I  
know it causes the actual variable to be copied into the function,  
but assignSolver is already getting a pointer, so why would that be  
needed?  Could this be part of my problem?


Kyle


> Kyle,
>
> 	I can speak to the assignSolver question; I'll let John tackle the
> assignProblem issue (the answer may well be specific to clp).
>
> 	You need to up cast your OsiClpSolverInterface to OsiSolverInterface.
> This should be pretty straightforward --- either use a  
> dynamic_cast, or assign
> your OsiClpSolverInterface* to a variable of type OsiSolverInterface*.
>
> 							Lou
>
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