NonlinearSolver.h

// Copyright 2024, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
 
#include "neml2/solvers/Solver.h"
#include "neml2/solvers/LinearSolver.h"
#include "neml2/equation_systems/NonlinearSystem.h"
 
namespace neml2
{
class NonlinearSolver : public Solver
{
public:
  enum class RetCode : std::uint8_t
  {
    SUCCESS = 0,
    MAXITER = 1,
    FAILURE = 2
  };
 
  struct Result
  {
    RetCode ret = RetCode::FAILURE;
    std::size_t iterations = 0;
  };
 
  static OptionSet expected_options();
 
  NonlinearSolver(const OptionSet & options);
 
  void to(const TensorOptions &) override;

  virtual Result solve(NonlinearSystem & system) = 0;

  std::shared_ptr<LinearSolver> linear_solver;
  double atol;
  double rtol;
  unsigned int miters;
};
} // namespace neml2