Method clone

include/cppoptlib/function_expressions.h:68–71

    return c;
  }
  virtual std::unique_ptr<FunctionInterface<TScalar, TMode, Dimension>> clone()
      const override {
    return std::make_unique<ConstExpression<TScalar, TMode, Dimension>>(c);
  }
};

// Helper to compute the minimum differentiability mode.