function-xpr-slice.hpp

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#pragma once
 
#include "aligator/core/function-abstract.hpp"
#include "aligator/core/unary-function.hpp"
#include <proxsuite-nlp/third-party/polymorphic_cxx14.hpp>
 
namespace aligator {
 
namespace detail {
template <typename Base> struct slice_impl_tpl;
}
 
template <typename Scalar> struct FunctionSliceDataTpl;
 
template <typename Scalar, typename Base = StageFunctionTpl<Scalar>>
struct FunctionSliceXprTpl;
 
template <typename Scalar>
struct FunctionSliceXprTpl<Scalar, StageFunctionTpl<Scalar>>
    : StageFunctionTpl<Scalar>,
      detail::slice_impl_tpl<StageFunctionTpl<Scalar>> {
  ALIGATOR_DYNAMIC_TYPEDEFS(Scalar);
  using Base = StageFunctionTpl<Scalar>;
  using BaseData = StageFunctionDataTpl<Scalar>;
  using SliceImpl = detail::slice_impl_tpl<StageFunctionTpl<Scalar>>;
  using Data = FunctionSliceDataTpl<Scalar>;
 
  FunctionSliceXprTpl(xyz::polymorphic<Base> func,
                      std::vector<int> const &indices)
      : Base(func->ndx1, func->nu, (int)indices.size()),
        SliceImpl(func, indices) {}
 
  FunctionSliceXprTpl(xyz::polymorphic<Base> func, const int idx)
      : FunctionSliceXprTpl(func, std::vector<int>{idx}) {}
 
  void evaluate(const ConstVectorRef &x, const ConstVectorRef &u,
                BaseData &data) const override {
 
    this->evaluate_impl(data, x, u);
  }
 
  void computeJacobians(const ConstVectorRef &x, const ConstVectorRef &u,
                        BaseData &data) const override {
    this->computeJacobians_impl(data, x, u);
  }
 
  void computeVectorHessianProducts(const ConstVectorRef &x,
                                    const ConstVectorRef &u,
                                    const ConstVectorRef &lbda,
                                    BaseData &data) const override {
    this->computeVectorHessianProducts_impl(data, lbda, x, u);
  }
 
  shared_ptr<BaseData> createData() const override {
    return std::make_shared<Data>(*this);
  }
};
 
template <typename Scalar>
struct FunctionSliceXprTpl<Scalar, UnaryFunctionTpl<Scalar>>
    : UnaryFunctionTpl<Scalar>,
      detail::slice_impl_tpl<UnaryFunctionTpl<Scalar>> {
  ALIGATOR_DYNAMIC_TYPEDEFS(Scalar);
  using BaseData = StageFunctionDataTpl<Scalar>;
  using Data = FunctionSliceDataTpl<Scalar>;
  ALIGATOR_UNARY_FUNCTION_INTERFACE(Scalar);
  using SliceImpl = detail::slice_impl_tpl<UnaryFunctionTpl<Scalar>>;
 
  FunctionSliceXprTpl(xyz::polymorphic<Base> func,
                      std::vector<int> const &indices)
      : Base(func->ndx1, func->nu, (int)indices.size()),
        SliceImpl(func, indices) {}
 
  FunctionSliceXprTpl(xyz::polymorphic<Base> func, const int idx)
      : FunctionSliceXprTpl(func, std::vector<int>{idx}) {}
 
  void evaluate(const ConstVectorRef &x, BaseData &data) const override {
 
    this->evaluate_impl(data, x);
  }
 
  void computeJacobians(const ConstVectorRef &x,
                        BaseData &data) const override {
    this->computeJacobians_impl(data, x);
  }
 
  void computeVectorHessianProducts(const ConstVectorRef &x,
                                    const ConstVectorRef &lbda,
                                    BaseData &data) const override {
    this->computeVectorHessianProducts_impl(data, lbda, x);
  }
 
  shared_ptr<BaseData> createData() const override {
    return std::make_shared<Data>(*this);
  }
};
 
template <typename Scalar>
struct FunctionSliceDataTpl : StageFunctionDataTpl<Scalar> {
  using BaseData = StageFunctionDataTpl<Scalar>;
  ALIGATOR_DYNAMIC_TYPEDEFS(Scalar);
  shared_ptr<BaseData> sub_data;
  VectorXs lbda_sub;
 
  template <typename Base>
  FunctionSliceDataTpl(FunctionSliceXprTpl<Scalar, Base> const &obj)
      : BaseData(obj.ndx1, obj.nu, obj.nr), sub_data(obj.func->createData()),
        lbda_sub(obj.nr) {}
};
 
namespace detail {
template <typename Base> struct slice_impl_tpl {
  using Scalar = typename Base::Scalar;
  ALIGATOR_DYNAMIC_TYPEDEFS(Scalar);
  using BaseData = StageFunctionDataTpl<Scalar>;
 
  using Data = FunctionSliceDataTpl<Scalar>;
 
  xyz::polymorphic<Base> func;
  std::vector<int> indices;
 
  slice_impl_tpl(xyz::polymorphic<Base> func, std::vector<int> const &indices);
  slice_impl_tpl(xyz::polymorphic<Base> func, int idx);
 
protected:
  template <typename... Args>
  void evaluate_impl(BaseData &data, Args &&...args) const;
 
  template <typename... Args>
  void computeJacobians_impl(BaseData &data, Args &&...args) const;
 
  template <typename... Args>
  void computeVectorHessianProducts_impl(BaseData &data,
                                         const ConstVectorRef &lbda,
                                         Args &&...args) const;
};
} // namespace detail
 
} // namespace aligator
 
#include "aligator/modelling/function-xpr-slice.hxx"
 
#ifdef ALIGATOR_ENABLE_TEMPLATE_INSTANTIATION
#include "aligator/modelling/function-xpr-slice.txx"
#endif