ceph/src/boost/libs/python/include/boost/python/arg_from_python.hpp

   1 // Copyright David Abrahams 2002.
   2 // Distributed under the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5 #ifndef ARG_FROM_PYTHON_DWA2002128_HPP
   6 # define ARG_FROM_PYTHON_DWA2002128_HPP
   7
   8 # include <boost/python/detail/prefix.hpp>
   9 # include <boost/python/converter/arg_from_python.hpp>
  10 # if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
  11     || BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(800))
  12 # include <boost/type_traits/remove_cv.hpp>
  13 #endif
  14
  15 namespace boost { namespace python {
  16
  17 template <class T>
  18 struct arg_from_python
  19     : converter::select_arg_from_python<
  20 # if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
  21     || BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(800))
  22           typename boost::remove_cv<T>::type
  23 # else
  24           T
  25 # endif
  26       >::type
  27 {
  28     typedef typename converter::select_arg_from_python<
  29 # if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
  30     || BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(800))
  31           typename boost::remove_cv<T>::type
  32 # else
  33           T
  34 # endif
  35         >::type base;
  36
  37     arg_from_python(PyObject*);
  38 };
  39
  40 // specialization for PyObject*
  41 template <>
  42 struct arg_from_python<PyObject*>
  43 {
  44     typedef PyObject* result_type;
  45
  46     arg_from_python(PyObject* p) : m_source(p) {}
  47     bool convertible() const { return true; }
  48     PyObject* operator()() const { return m_source; }
  49  private:
  50     PyObject* m_source;
  51 };
  52
  53 template <>
  54 struct arg_from_python<PyObject* const&>
  55 {
  56     typedef PyObject* const& result_type;
  57
  58     arg_from_python(PyObject* p) : m_source(p) {}
  59     bool convertible() const { return true; }
  60     PyObject*const& operator()() const { return m_source; }
  61  private:
  62     PyObject* m_source;
  63 };
  64
  65 //
  66 // implementations
  67 //
  68 template <class T>
  69 inline arg_from_python<T>::arg_from_python(PyObject* source)
  70     : base(source)
  71 {
  72 }
  73
  74 }} // namespace boost::python
  75
  76 #endif // ARG_FROM_PYTHON_DWA2002128_HPP