Imported existing code

libraries/include/boost/python/arg_from_python.hpp

@@ -0,0 +1,76 @@
+// Copyright David Abrahams 2002.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+#ifndef ARG_FROM_PYTHON_DWA2002128_HPP
+# define ARG_FROM_PYTHON_DWA2002128_HPP
+
+# include <boost/python/detail/prefix.hpp>
+# include <boost/python/converter/arg_from_python.hpp>
+# if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
+    || BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(800))
+# include <boost/type_traits/remove_cv.hpp>
+#endif
+
+namespace boost { namespace python { 
+
+template <class T>
+struct arg_from_python
+    : converter::select_arg_from_python<
+# if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
+    || BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(800))
+          typename boost::remove_cv<T>::type
+# else
+          T
+# endif 
+      >::type
+{
+    typedef typename converter::select_arg_from_python<
+# if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
+    || BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(800))
+          typename boost::remove_cv<T>::type
+# else
+          T
+# endif 
+        >::type base;
+    
+    arg_from_python(PyObject*);
+};
+
+// specialization for PyObject*
+template <>
+struct arg_from_python<PyObject*>
+{
+    typedef PyObject* result_type;
+    
+    arg_from_python(PyObject* p) : m_source(p) {}
+    bool convertible() const { return true; }
+    PyObject* operator()() const { return m_source; }
+ private:
+    PyObject* m_source;
+};
+
+template <>
+struct arg_from_python<PyObject* const&>
+{
+    typedef PyObject* const& result_type;
+    
+    arg_from_python(PyObject* p) : m_source(p) {}
+    bool convertible() const { return true; }
+    PyObject*const& operator()() const { return m_source; }
+ private:
+    PyObject* m_source;
+};
+
+//
+// implementations
+//
+template <class T>
+inline arg_from_python<T>::arg_from_python(PyObject* source)
+    : base(source)
+{
+}
+
+}} // namespace boost::python
+
+#endif // ARG_FROM_PYTHON_DWA2002128_HPP