.. _program_listing_file__tmp_ws_src_eigenpy_include_eigenpy_solvers_BFGSPreconditioners.hpp:

Program Listing for File BFGSPreconditioners.hpp
================================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_eigenpy_include_eigenpy_solvers_BFGSPreconditioners.hpp>` (``/tmp/ws/src/eigenpy/include/eigenpy/solvers/BFGSPreconditioners.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /*
    * Copyright 2017, Justin Carpentier, LAAS-CNRS
    *
    * This file is part of eigenpy.
    * eigenpy is free software: you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public License
    * as published by the Free Software Foundation, either version 3 of
    * the License, or (at your option) any later version.
    * eigenpy is distributed in the hope that it will be
    * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
    * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * GNU Lesser General Public License for more details.  You should
    * have received a copy of the GNU Lesser General Public License along
    * with eigenpy.  If not, see <http://www.gnu.org/licenses/>.
    */
   
   #ifndef __eigenpy_bfgs_preconditioners_hpp__
   #define __eigenpy_bfgs_preconditioners_hpp__
   
   #include <Eigen/IterativeLinearSolvers>
   
   #include "eigenpy/fwd.hpp"
   #include "eigenpy/solvers/BasicPreconditioners.hpp"
   
   namespace eigenpy {
   
   template <typename Preconditioner>
   struct BFGSPreconditionerBaseVisitor
       : public bp::def_visitor<BFGSPreconditionerBaseVisitor<Preconditioner> > {
     typedef Eigen::VectorXd VectorType;
     template <class PyClass>
     void visit(PyClass& cl) const {
       cl.def(PreconditionerBaseVisitor<Preconditioner>())
           .def("rows", &Preconditioner::rows,
                "Returns the number of rows in the preconditioner.")
           .def("cols", &Preconditioner::cols,
                "Returns the number of cols in the preconditioner.")
           .def("dim", &Preconditioner::dim,
                "Returns the dimension of the BFGS preconditioner")
           .def("update",
                (const Preconditioner& (Preconditioner::*)(const VectorType&,
                                                           const VectorType&)
                     const) &
                    Preconditioner::update,
                bp::args("s", "y"), "Update the BFGS estimate of the matrix A.",
                bp::return_value_policy<bp::reference_existing_object>())
           .def("reset", &Preconditioner::reset, "Reset the BFGS estimate.");
     }
   
     static void expose(const std::string& name) {
       bp::class_<Preconditioner>(name, bp::no_init)
           .def(BFGSPreconditionerBaseVisitor<Preconditioner>());
     }
   };
   
   template <typename Preconditioner>
   struct LimitedBFGSPreconditionerBaseVisitor
       : public bp::def_visitor<
             LimitedBFGSPreconditionerBaseVisitor<Preconditioner> > {
     template <class PyClass>
     void visit(PyClass& cl) const {
       cl.def(PreconditionerBaseVisitor<Preconditioner>())
           .def(BFGSPreconditionerBaseVisitor<Preconditioner>())
           .def("resize", &Preconditioner::resize, bp::arg("dim"),
                "Resizes the preconditionner with size dim.",
                bp::return_value_policy<bp::reference_existing_object>());
     }
   
     static void expose(const std::string& name) {
       bp::class_<Preconditioner>(name.c_str(), bp::no_init)
           .def(LimitedBFGSPreconditionerBaseVisitor<Preconditioner>());
     }
   };
   
   }  // namespace eigenpy
   
   #endif  // ifndef __eigenpy_bfgs_preconditioners_hpp__