/usr/include/roboptim/core/constant-function.hh is in libroboptim-core-dev 2.0-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// This file is part of the roboptim.
//
// roboptim 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.
//
// roboptim 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 roboptim. If not, see <http://www.gnu.org/licenses/>.
#ifndef ROBOPTIM_CORE_CONSTANT_FUNCTION_HH
# define ROBOPTIM_CORE_CONSTANT_FUNCTION_HH
# include <roboptim/core/fwd.hh>
# include <roboptim/core/linear-function.hh>
# include <roboptim/core/portability.hh>
namespace roboptim
{
/// \addtogroup roboptim_function
/// @{
/// \brief Constant function.
///
/// Implement a constant function using the formula:
/// \f[f(x) = offset\f]
/// where \f$offset\f$ is set when the class is instantiated.
class ROBOPTIM_DLLAPI ConstantFunction : public LinearFunction
{
public:
/// \brief Build an constant function.
///
/// \param offset constant function offset
ConstantFunction (const vector_t& offset) throw ();
~ConstantFunction () throw ();
/// \brief Display the function on the specified output stream.
///
/// \param o output stream used for display
/// \return output stream
virtual std::ostream& print (std::ostream&) const throw ();
protected:
void impl_compute (result_t& , const argument_t&) const throw ();
void impl_gradient (gradient_t&, const argument_t&, size_type = 0)
const throw ();
void impl_jacobian (jacobian_t&, const argument_t&) const throw ();
private:
const vector_t offset_;
};
/// Example shows constant function use.
/// \example constant-function.cc
/// @}
} // end of namespace roboptim
#endif //! ROBOPTIM_CORE_CONSTANT_FUNCTION_HH
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