Method operator()

include/cppoptlib/function_base.h:247–250

Call operator.

  // Call operator.
  ScalarType operator()(const VectorType& x, VectorType* grad = nullptr,
                        MatrixType* hess = nullptr) const {
    return (*ptr)(x, grad, hess);
  }

  // Exposes the stored interface for mode-downgrading converting
  // construction into a weaker-mode `FunctionExpr`.  Returns a