Added boost header

test/external/boost/python/object/value_holder.hpp

@@ -0,0 +1,170 @@
+#if !defined(BOOST_PP_IS_ITERATING)
+
+// Copyright David Abrahams 2001.
+// 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 VALUE_HOLDER_DWA20011215_HPP
+#  define VALUE_HOLDER_DWA20011215_HPP 
+
+#  include <boost/python/object/value_holder_fwd.hpp>
+
+#  include <boost/python/instance_holder.hpp>
+#  include <boost/python/type_id.hpp>
+#  include <boost/python/wrapper.hpp>
+
+#  include <boost/python/object/inheritance_query.hpp>
+#  include <boost/python/object/forward.hpp>
+
+#  include <boost/python/detail/force_instantiate.hpp>
+#  include <boost/python/detail/preprocessor.hpp>
+
+#  include <boost/preprocessor/comma_if.hpp>
+#  include <boost/preprocessor/enum_params.hpp>
+#  include <boost/preprocessor/iterate.hpp>
+#  include <boost/preprocessor/repeat.hpp>
+#  include <boost/preprocessor/debug/line.hpp>
+
+#  include <boost/preprocessor/repetition/enum_params.hpp>
+#  include <boost/preprocessor/repetition/enum_binary_params.hpp>
+
+#  include <boost/utility/addressof.hpp>
+
+namespace boost { namespace python { namespace objects { 
+
+#  if BOOST_WORKAROUND(__GNUC__, == 2)
+#   define BOOST_PYTHON_UNFORWARD_LOCAL(z, n, _) BOOST_PP_COMMA_IF(n) (typename unforward<A##n>::type)objects::do_unforward(a##n,0)
+#  else
+#   define BOOST_PYTHON_UNFORWARD_LOCAL(z, n, _) BOOST_PP_COMMA_IF(n) objects::do_unforward(a##n,0)
+#  endif 
+
+template <class Value>
+struct value_holder : instance_holder
+{
+    typedef Value held_type;
+    typedef Value value_type;
+
+    // Forward construction to the held object
+#  define BOOST_PP_ITERATION_PARAMS_1 (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/value_holder.hpp>, 1))
+#  include BOOST_PP_ITERATE()
+
+ private: // required holder implementation
+    void* holds(type_info, bool null_ptr_only);
+    
+    template <class T>
+    inline void* holds_wrapped(type_info dst_t, wrapper<T>*,T* p)
+    {
+        return python::type_id<T>() == dst_t ? p : 0;
+    }
+    
+    inline void* holds_wrapped(type_info, ...)
+    {
+        return 0;
+    }
+ private: // data members
+    Value m_held;
+};
+
+template <class Value, class Held>
+struct value_holder_back_reference : instance_holder
+{
+    typedef Held held_type;
+    typedef Value value_type;
+    
+    // Forward construction to the held object
+#  define BOOST_PP_ITERATION_PARAMS_1 (4, (0, BOOST_PYTHON_MAX_ARITY, <boost/python/object/value_holder.hpp>, 2))
+#  include BOOST_PP_ITERATE()
+
+private: // required holder implementation
+    void* holds(type_info, bool null_ptr_only);
+
+ private: // data members
+    Held m_held;
+};
+
+#  undef BOOST_PYTHON_UNFORWARD_LOCAL
+
+template <class Value>
+void* value_holder<Value>::holds(type_info dst_t, bool /*null_ptr_only*/)
+{
+    if (void* wrapped = holds_wrapped(dst_t, boost::addressof(m_held), boost::addressof(m_held)))
+        return wrapped;
+    
+    type_info src_t = python::type_id<Value>();
+    return src_t == dst_t ? boost::addressof(m_held)
+        : find_static_type(boost::addressof(m_held), src_t, dst_t);
+}
+
+template <class Value, class Held>
+void* value_holder_back_reference<Value,Held>::holds(
+    type_info dst_t, bool /*null_ptr_only*/)
+{
+    type_info src_t = python::type_id<Value>();
+    Value* x = &m_held;
+    
+    if (dst_t == src_t)
+        return x;
+    else if (dst_t == python::type_id<Held>())
+        return &m_held;
+    else
+        return find_static_type(x, src_t, dst_t);
+}
+
+}}} // namespace boost::python::objects
+
+# endif // VALUE_HOLDER_DWA20011215_HPP
+
+// --------------- value_holder ---------------
+
+// For gcc 4.4 compatability, we must include the
+// BOOST_PP_ITERATION_DEPTH test inside an #else clause.
+#else // BOOST_PP_IS_ITERATING
+#if BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == 1
+# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100)                      \
+        && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
+#  line BOOST_PP_LINE(__LINE__, value_holder.hpp(value_holder))
+# endif
+
+# define N BOOST_PP_ITERATION()
+
+# if (N != 0)
+    template <BOOST_PP_ENUM_PARAMS_Z(1, N, class A)>
+# endif
+    value_holder(
+      PyObject* self BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a))
+        : m_held(
+            BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil)
+            )
+    {
+        python::detail::initialize_wrapper(self, boost::addressof(this->m_held));
+    }
+
+# undef N
+
+// --------------- value_holder_back_reference ---------------
+
+#elif BOOST_PP_ITERATION_DEPTH() == 1 && BOOST_PP_ITERATION_FLAGS() == 2
+# if !(BOOST_WORKAROUND(__MWERKS__, > 0x3100)                      \
+        && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3201)))
+#  line BOOST_PP_LINE(__LINE__, value_holder.hpp(value_holder_back_reference))
+# endif
+
+# define N BOOST_PP_ITERATION()
+
+# if (N != 0)
+    template <BOOST_PP_ENUM_PARAMS_Z(1, N, class A)>
+# endif
+    value_holder_back_reference(
+        PyObject* p BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, A, a))
+        : m_held(
+            p BOOST_PP_COMMA_IF(N)
+            BOOST_PP_REPEAT_1ST(N, BOOST_PYTHON_UNFORWARD_LOCAL, nil)
+            )
+    {
+    }
+
+# undef N
+
+#endif // BOOST_PP_ITERATION_DEPTH()
+#endif