ceph/src/boost/libs/python/include/boost/python/numpy/scalars.hpp

   1 // Copyright Jim Bosch 2010-2012.
   2 // Copyright Stefan Seefeld 2016.
   3 // Distributed under the Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #ifndef boost_python_numpy_scalars_hpp_
   8 #define boost_python_numpy_scalars_hpp_
   9
  10 /**
  11  *  @brief Object managers for array scalars (currently only numpy.void is implemented).
  12  */
  13
  14 #include <boost/python.hpp>
  15 #include <boost/python/numpy/numpy_object_mgr_traits.hpp>
  16 #include <boost/python/numpy/dtype.hpp>
  17
  18 namespace boost { namespace python { namespace numpy {
  19
  20 /**
  21  *  @brief A boost.python "object manager" (subclass of object) for numpy.void.
  22  *
  23  *  @todo This could have a lot more functionality.
  24  */
  25 class void_ : public object
  26 {
  27   static python::detail::new_reference convert(object_cref arg, bool align);
  28 public:
  29
  30   /**
  31    *  @brief Construct a new array scalar with the given size and void dtype.
  32    *
  33    *  Data is initialized to zero.  One can create a standalone scalar object
  34    *  with a certain dtype "dt" with:
  35    *  @code
  36    *  void_ scalar = void_(dt.get_itemsize()).view(dt);
  37    *  @endcode
  38    */
  39   explicit void_(Py_ssize_t size);
  40
  41   BOOST_PYTHON_FORWARD_OBJECT_CONSTRUCTORS(void_, object);
  42
  43   /// @brief Return a view of the scalar with the given dtype.
  44   void_ view(dtype const & dt) const;
  45
  46   /// @brief Copy the scalar (deep for all non-object fields).
  47   void_ copy() const;
  48
  49 };
  50
  51 } // namespace boost::python::numpy
  52
  53 namespace converter
  54 {
  55 NUMPY_OBJECT_MANAGER_TRAITS(numpy::void_);
  56 }}} // namespace boost::python::converter
  57
  58 #endif