SundanceTransientStepProblem.hpp

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//                              Sundance
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#ifndef SUNDANCE_TRANSIENT_STEP_PROBLEM_H
#define SUNDANCE_TRANSIENT_STEP_PROBLEM_H


#include "SundanceDefs.hpp"
#include "SundanceNonlinearProblem.hpp"

namespace Sundance
{
using Playa::NonlinearSolver;

/** 
 *
 */
class TransientStepProblem
{
public:
  /** */
  TransientStepProblem(
    const NonlinearProblem& stepProb, 
    const Expr& tPrev, const Expr& uPrev, 
    const Expr& tNext, const Expr& uNext,
    const Expr& dt,
    int verbosity=0
    );

  /** */
  bool step(double tCur, const Expr& uCur,
    double tNext, Expr uNext,
    const NonlinearSolver<double>& solver) const ;


  /** */
  Expr uCur() const {return uPrev_;}
  /** */
  Expr uSoln() const {return uNext_;}


private:
  NonlinearProblem prob_;
  mutable Expr tPrev_;
  mutable Expr tNext_;
  mutable Expr uPrev_;
  mutable Expr uNext_;
  mutable Expr dt_;
  int verb_;
};

}


#endif