Imported from /home/lorry/working-area/delta_boost-tarball/boost_1_54_0.tar.bz2.boost_1_54_0baserock/morph

1 files changed, 793 insertions, 0 deletions

diff --git a/libs/python/src/object/function.cpp b/libs/python/src/object/function.cpp
new file mode 100644
index 000000000..5c59cc779
--- /dev/null
+++ b/libs/python/src/object/function.cpp
@@ -0,0 +1,793 @@
+// 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)
+
+#include <boost/python/docstring_options.hpp>
+#include <boost/python/object/function_object.hpp>
+#include <boost/python/object/function_handle.hpp>
+#include <boost/python/object/function_doc_signature.hpp>
+#include <boost/python/errors.hpp>
+#include <boost/python/str.hpp>
+#include <boost/python/object_attributes.hpp>
+#include <boost/python/args.hpp>
+#include <boost/python/refcount.hpp>
+#include <boost/python/extract.hpp>
+#include <boost/python/tuple.hpp>
+#include <boost/python/list.hpp>
+#include <boost/python/ssize_t.hpp>
+
+#include <boost/python/detail/signature.hpp>
+#include <boost/python/detail/none.hpp>
+#include <boost/mpl/vector/vector10.hpp>
+
+#include <boost/bind.hpp>
+
+#include <algorithm>
+#include <cstring>
+
+#if BOOST_PYTHON_DEBUG_ERROR_MESSAGES
+# include <cstdio>
+#endif
+
+namespace boost { namespace python {
+  volatile bool docstring_options::show_user_defined_ = true;
+  volatile bool docstring_options::show_cpp_signatures_ = true;
+#ifndef BOOST_PYTHON_NO_PY_SIGNATURES
+  volatile bool docstring_options::show_py_signatures_ = true;
+#else
+  volatile bool docstring_options::show_py_signatures_ = false;
+#endif
+}}
+
+namespace boost { namespace python { namespace objects { 
+
+py_function_impl_base::~py_function_impl_base()
+{
+}
+
+unsigned py_function_impl_base::max_arity() const
+{
+    return this->min_arity();
+}
+
+extern PyTypeObject function_type;
+
+function::function(
+    py_function const& implementation
+#if BOOST_WORKAROUND(__EDG_VERSION__, == 245)
+    , python::detail::keyword const*       names_and_defaults
+#else
+    , python::detail::keyword const* const names_and_defaults
+#endif
+    , unsigned num_keywords
+    )
+    : m_fn(implementation)
+    , m_nkeyword_values(0)
+{
+    if (names_and_defaults != 0)
+    {
+        unsigned int max_arity = m_fn.max_arity();
+        unsigned int keyword_offset
+            = max_arity > num_keywords ? max_arity - num_keywords : 0;
+
+
+        ssize_t tuple_size = num_keywords ? max_arity : 0;
+        m_arg_names = object(handle<>(PyTuple_New(tuple_size)));
+
+        if (num_keywords != 0)
+        {
+            for (unsigned j = 0; j < keyword_offset; ++j)
+                PyTuple_SET_ITEM(m_arg_names.ptr(), j, incref(Py_None));
+        }
+        
+        for (unsigned i = 0; i < num_keywords; ++i)
+        {
+            tuple kv;
+
+            python::detail::keyword const* const p = names_and_defaults + i;
+            if (p->default_value)
+            {
+                kv = make_tuple(p->name, p->default_value);
+                ++m_nkeyword_values;
+            }
+            else
+            {
+                kv = make_tuple(p->name);
+            }
+
+            PyTuple_SET_ITEM(
+                m_arg_names.ptr()
+                , i + keyword_offset
+                , incref(kv.ptr())
+                );
+        }
+    }
+    
+    PyObject* p = this;
+    if (Py_TYPE(&function_type) == 0)
+    {
+        Py_TYPE(&function_type) = &PyType_Type;
+        ::PyType_Ready(&function_type);
+    }
+    
+    (void)(     // warning suppression for GCC
+        PyObject_INIT(p, &function_type)
+    );
+}
+
+function::~function()
+{
+}
+
+PyObject* function::call(PyObject* args, PyObject* keywords) const
+{
+    std::size_t n_unnamed_actual = PyTuple_GET_SIZE(args);
+    std::size_t n_keyword_actual = keywords ? PyDict_Size(keywords) : 0;
+    std::size_t n_actual = n_unnamed_actual + n_keyword_actual;
+    
+    function const* f = this;
+
+    // Try overloads looking for a match
+    do
+    {
+        // Check for a plausible number of arguments
+        unsigned min_arity = f->m_fn.min_arity();
+        unsigned max_arity = f->m_fn.max_arity();
+
+        if (n_actual + f->m_nkeyword_values >= min_arity
+            && n_actual <= max_arity)
+        {
+            // This will be the args that actually get passed
+            handle<>inner_args(allow_null(borrowed(args)));
+
+            if (n_keyword_actual > 0      // Keyword arguments were supplied
+                 || n_actual < min_arity) // or default keyword values are needed
+            {                            
+                if (f->m_arg_names.is_none())
+                {
+                    // this overload doesn't accept keywords
+                    inner_args = handle<>();
+                }
+                else
+                {
+                    // "all keywords are none" is a special case
+                    // indicating we will accept any number of keyword
+                    // arguments
+                    if (PyTuple_Size(f->m_arg_names.ptr()) == 0)
+                    {
+                        // no argument preprocessing
+                    }
+                    else if (n_actual > max_arity)
+                    {
+                        // too many arguments
+                        inner_args = handle<>();
+                    }
+                    else
+                    {
+                        // build a new arg tuple, will adjust its size later
+                        assert(max_arity <= static_cast<std::size_t>(ssize_t_max));
+                        inner_args = handle<>(
+                            PyTuple_New(static_cast<ssize_t>(max_arity)));
+
+                        // Fill in the positional arguments
+                        for (std::size_t i = 0; i < n_unnamed_actual; ++i)
+                            PyTuple_SET_ITEM(inner_args.get(), i, incref(PyTuple_GET_ITEM(args, i)));
+
+                        // Grab remaining arguments by name from the keyword dictionary
+                        std::size_t n_actual_processed = n_unnamed_actual;
+                
+                        for (std::size_t arg_pos = n_unnamed_actual; arg_pos < max_arity ; ++arg_pos)
+                        {
+                            // Get the keyword[, value pair] corresponding
+                            PyObject* kv = PyTuple_GET_ITEM(f->m_arg_names.ptr(), arg_pos);
+
+                            // If there were any keyword arguments,
+                            // look up the one we need for this
+                            // argument position
+                            PyObject* value = n_keyword_actual
+                                ? PyDict_GetItem(keywords, PyTuple_GET_ITEM(kv, 0))
+                                : 0;
+
+                            if (!value)
+                            {
+                                // Not found; check if there's a default value
+                                if (PyTuple_GET_SIZE(kv) > 1)
+                                    value = PyTuple_GET_ITEM(kv, 1);
+                        
+                                if (!value)
+                                {
+                                    // still not found; matching fails
+                                    PyErr_Clear();
+                                    inner_args = handle<>();
+                                    break;
+                                }
+                            }
+                            else
+                            {
+                                ++n_actual_processed;
+                            }
+
+                            PyTuple_SET_ITEM(inner_args.get(), arg_pos, incref(value));
+                        }
+
+                        if (inner_args.get())
+                        {
+                            //check if we proccessed all the arguments
+                            if(n_actual_processed < n_actual)
+                                inner_args = handle<>();
+                        }
+                    }
+                }
+            }
+            
+            // Call the function.  Pass keywords in case it's a
+            // function accepting any number of keywords
+            PyObject* result = inner_args ? f->m_fn(inner_args.get(), keywords) : 0;
+            
+            // If the result is NULL but no error was set, m_fn failed
+            // the argument-matching test.
+
+            // This assumes that all other error-reporters are
+            // well-behaved and never return NULL to python without
+            // setting an error.
+            if (result != 0 || PyErr_Occurred())
+                return result;
+        }
+        f = f->m_overloads.get();
+    }
+    while (f);
+    // None of the overloads matched; time to generate the error message
+    argument_error(args, keywords);
+    return 0;
+}
+
+object function::signature(bool show_return_type) const
+{
+    py_function const& impl = m_fn;
+    
+    python::detail::signature_element const* return_type = impl.signature();
+    python::detail::signature_element const* s = return_type + 1;
+    
+    list formal_params;
+    if (impl.max_arity() == 0)
+        formal_params.append("void");
+
+    for (unsigned n = 0; n < impl.max_arity(); ++n)
+    {
+        if (s[n].basename == 0)
+        {
+            formal_params.append("...");
+            break;
+        }
+
+        str param(s[n].basename);
+        if (s[n].lvalue)
+            param += " {lvalue}";
+        
+        if (m_arg_names) // None or empty tuple will test false
+        {
+            object kv(m_arg_names[n]);
+            if (kv)
+            {
+                char const* const fmt = len(kv) > 1 ? " %s=%r" : " %s";
+                param += fmt % kv;
+            }
+        }
+        
+        formal_params.append(param);
+    }
+
+    if (show_return_type)
+        return "%s(%s) -> %s" % make_tuple(
+            m_name, str(", ").join(formal_params), return_type->basename);
+    return "%s(%s)" % make_tuple(
+        m_name, str(", ").join(formal_params));
+}
+
+object function::signatures(bool show_return_type) const
+{
+    list result;
+    for (function const* f = this; f; f = f->m_overloads.get()) {
+        result.append(f->signature(show_return_type));
+    }
+    return result;
+}
+
+void function::argument_error(PyObject* args, PyObject* /*keywords*/) const
+{
+    static handle<> exception(
+        PyErr_NewException(const_cast<char*>("Boost.Python.ArgumentError"), PyExc_TypeError, 0));
+
+    object message = "Python argument types in\n    %s.%s("
+        % make_tuple(this->m_namespace, this->m_name);
+    
+    list actual_args;
+    for (ssize_t i = 0; i < PyTuple_Size(args); ++i)
+    {
+        char const* name = PyTuple_GetItem(args, i)->ob_type->tp_name;
+        actual_args.append(str(name));
+    }
+    message += str(", ").join(actual_args);
+    message += ")\ndid not match C++ signature:\n    ";
+    message += str("\n    ").join(signatures());
+
+#if BOOST_PYTHON_DEBUG_ERROR_MESSAGES
+    std::printf("\n--------\n%s\n--------\n", extract<const char*>(message)());
+#endif 
+    PyErr_SetObject(exception.get(), message.ptr());
+    throw_error_already_set();
+}
+
+void function::add_overload(handle<function> const& overload_)
+{
+    function* parent = this;
+    
+    while (parent->m_overloads)
+        parent = parent->m_overloads.get();
+
+    parent->m_overloads = overload_;
+
+    // If we have no documentation, get the docs from the overload
+    if (!m_doc)
+        m_doc = overload_->m_doc;
+}
+
+namespace
+{
+  char const* const binary_operator_names[] =
+  {
+      "add__",
+      "and__",
+      "div__",
+      "divmod__",
+      "eq__",
+      "floordiv__",
+      "ge__",
+      "gt__",
+      "le__",
+      "lshift__",
+      "lt__",
+      "mod__",
+      "mul__",
+      "ne__",
+      "or__",
+      "pow__",
+      "radd__",
+      "rand__",
+      "rdiv__",
+      "rdivmod__", 
+      "rfloordiv__",
+      "rlshift__",
+      "rmod__",
+      "rmul__",
+      "ror__",
+      "rpow__", 
+      "rrshift__",
+      "rshift__",
+      "rsub__",
+      "rtruediv__",
+      "rxor__",
+      "sub__",
+      "truediv__", 
+      "xor__"
+  };
+
+  struct less_cstring
+  {
+      bool operator()(char const* x, char const* y) const
+      {
+          return BOOST_CSTD_::strcmp(x,y) < 0;
+      }
+  };
+  
+  inline bool is_binary_operator(char const* name)
+  {
+      return name[0] == '_'
+          && name[1] == '_'
+          && std::binary_search(
+              &binary_operator_names[0]
+              , binary_operator_names + sizeof(binary_operator_names)/sizeof(*binary_operator_names)
+              , name + 2
+              , less_cstring()
+              );
+  }
+
+  // Something for the end of the chain of binary operators
+  PyObject* not_implemented(PyObject*, PyObject*)
+  {
+      Py_INCREF(Py_NotImplemented);
+      return Py_NotImplemented;
+  }
+  
+  handle<function> not_implemented_function()
+  {
+      
+      static object keeper(
+          function_object(
+              py_function(&not_implemented, mpl::vector1<void>(), 2)
+            , python::detail::keyword_range())
+          );
+      return handle<function>(borrowed(downcast<function>(keeper.ptr())));
+  }
+}
+
+void function::add_to_namespace(
+    object const& name_space, char const* name_, object const& attribute)
+{
+    add_to_namespace(name_space, name_, attribute, 0);
+}
+
+namespace detail
+{
+    extern char py_signature_tag[];
+    extern char cpp_signature_tag[];
+}
+
+void function::add_to_namespace(
+    object const& name_space, char const* name_, object const& attribute, char const* doc)
+{
+    str const name(name_);
+    PyObject* const ns = name_space.ptr();
+    
+    if (attribute.ptr()->ob_type == &function_type)
+    {
+        function* new_func = downcast<function>(attribute.ptr());
+        handle<> dict;
+        
+#if PY_VERSION_HEX < 0x03000000
+        // Old-style class gone in Python 3
+        if (PyClass_Check(ns))
+            dict = handle<>(borrowed(((PyClassObject*)ns)->cl_dict));
+        else
+#endif        
+        if (PyType_Check(ns))
+            dict = handle<>(borrowed(((PyTypeObject*)ns)->tp_dict));
+        else    
+            dict = handle<>(PyObject_GetAttrString(ns, const_cast<char*>("__dict__")));
+
+        if (dict == 0)
+            throw_error_already_set();
+
+        handle<> existing(allow_null(::PyObject_GetItem(dict.get(), name.ptr())));
+        
+        if (existing)
+        {
+            if (existing->ob_type == &function_type)
+            {
+                new_func->add_overload(
+                    handle<function>(
+                        borrowed(
+                            downcast<function>(existing.get())
+                        )
+                    )
+                );
+            }
+            else if (existing->ob_type == &PyStaticMethod_Type)
+            {
+                char const* name_space_name = extract<char const*>(name_space.attr("__name__"));
+                
+                ::PyErr_Format(
+                    PyExc_RuntimeError
+                    , "Boost.Python - All overloads must be exported "
+                      "before calling \'class_<...>(\"%s\").staticmethod(\"%s\")\'"
+                    , name_space_name
+                    , name_
+                    );
+                throw_error_already_set();
+            }
+        }
+        else if (is_binary_operator(name_))
+        {
+            // Binary operators need an additional overload which
+            // returns NotImplemented, so that Python will try the
+            // __rxxx__ functions on the other operand. We add this
+            // when no overloads for the operator already exist.
+            new_func->add_overload(not_implemented_function());
+        }
+
+        // A function is named the first time it is added to a namespace.
+        if (new_func->name().is_none())
+            new_func->m_name = name;
+
+        handle<> name_space_name(
+            allow_null(::PyObject_GetAttrString(name_space.ptr(), const_cast<char*>("__name__"))));
+        
+        if (name_space_name)
+            new_func->m_namespace = object(name_space_name);
+    }
+
+    // The PyObject_GetAttrString() or PyObject_GetItem calls above may
+    // have left an active error
+    PyErr_Clear();
+    if (PyObject_SetAttr(ns, name.ptr(), attribute.ptr()) < 0)
+        throw_error_already_set();
+
+    object mutable_attribute(attribute);
+/*
+    if (doc != 0 && docstring_options::show_user_defined_)
+    {
+        // Accumulate documentation
+        
+        if (
+            PyObject_HasAttrString(mutable_attribute.ptr(), "__doc__")
+            && mutable_attribute.attr("__doc__"))
+        {
+            mutable_attribute.attr("__doc__") += "\n\n";
+            mutable_attribute.attr("__doc__") += doc;
+        }
+        else {
+            mutable_attribute.attr("__doc__") = doc;
+        }
+    }
+
+    if (docstring_options::show_signatures_)
+    {
+        if (   PyObject_HasAttrString(mutable_attribute.ptr(), "__doc__")
+            && mutable_attribute.attr("__doc__")) {
+            mutable_attribute.attr("__doc__") += (
+              mutable_attribute.attr("__doc__")[-1] != "\n" ? "\n\n" : "\n");
+        }
+        else {
+            mutable_attribute.attr("__doc__") = "";
+        }
+        function* f = downcast<function>(attribute.ptr());
+        mutable_attribute.attr("__doc__") += str("\n    ").join(make_tuple(
+          "C++ signature:", f->signature(true)));
+    }
+    */
+    str _doc;
+
+    if (docstring_options::show_py_signatures_)
+    {
+        _doc += str(const_cast<const char*>(detail::py_signature_tag));
+    }
+    if (doc != 0 && docstring_options::show_user_defined_)
+        _doc += doc;
+
+    if (docstring_options::show_cpp_signatures_)
+    {
+        _doc += str(const_cast<const char*>(detail::cpp_signature_tag));
+    }
+    if(_doc)
+    {    
+        object mutable_attribute(attribute);
+        mutable_attribute.attr("__doc__")= _doc;
+    }
+}
+
+BOOST_PYTHON_DECL void add_to_namespace(
+    object const& name_space, char const* name, object const& attribute)
+{
+    function::add_to_namespace(name_space, name, attribute, 0);
+}
+
+BOOST_PYTHON_DECL void add_to_namespace(
+    object const& name_space, char const* name, object const& attribute, char const* doc)
+{
+    function::add_to_namespace(name_space, name, attribute, doc);
+}
+
+
+namespace
+{
+  struct bind_return
+  {
+      bind_return(PyObject*& result, function const* f, PyObject* args, PyObject* keywords)
+          : m_result(result)
+            , m_f(f)
+            , m_args(args)
+            , m_keywords(keywords)
+      {}
+
+      void operator()() const
+      {
+          m_result = m_f->call(m_args, m_keywords);
+      }
+      
+   private:
+      PyObject*& m_result;
+      function const* m_f;
+      PyObject* m_args;
+      PyObject* m_keywords;
+  };
+}
+
+extern "C"
+{
+    // Stolen from Python's funcobject.c
+    static PyObject *
+    function_descr_get(PyObject *func, PyObject *obj, PyObject *type_)
+    {
+#if PY_VERSION_HEX >= 0x03000000
+        // The implement is different in Python 3 because of the removal of unbound method
+        if (obj == Py_None || obj == NULL) {
+            Py_INCREF(func);
+            return func;
+        }
+        return PyMethod_New(func, obj);
+#else
+        if (obj == Py_None)
+            obj = NULL;
+        return PyMethod_New(func, obj, type_);
+#endif
+    }
+
+    static void
+    function_dealloc(PyObject* p)
+    {
+        delete static_cast<function*>(p);
+    }
+
+    static PyObject *
+    function_call(PyObject *func, PyObject *args, PyObject *kw)
+    {
+        PyObject* result = 0;
+        handle_exception(bind_return(result, static_cast<function*>(func), args, kw));
+        return result;
+    }
+
+    //
+    // Here we're using the function's tp_getset rather than its
+    // tp_members to set up __doc__ and __name__, because tp_members
+    // really depends on having a POD object type (it relies on
+    // offsets). It might make sense to reformulate function as a POD
+    // at some point, but this is much more expedient.
+    //
+    static PyObject* function_get_doc(PyObject* op, void*)
+    {
+        function* f = downcast<function>(op);
+        list signatures = function_doc_signature_generator::function_doc_signatures(f);
+        if(!signatures) return python::detail::none();
+        signatures.reverse();
+        return python::incref( str("\n").join(signatures).ptr());
+    }
+    
+    static int function_set_doc(PyObject* op, PyObject* doc, void*)
+    {
+        function* f = downcast<function>(op);
+        f->doc(doc ? object(python::detail::borrowed_reference(doc)) : object());
+        return 0;
+    }
+    
+    static PyObject* function_get_name(PyObject* op, void*)
+    {
+        function* f = downcast<function>(op);
+        if (f->name().is_none())
+#if PY_VERSION_HEX >= 0x03000000
+            return PyUnicode_InternFromString("<unnamed Boost.Python function>");
+#else
+            return PyString_InternFromString("<unnamed Boost.Python function>");
+#endif
+        else
+            return python::incref(f->name().ptr());
+    }
+
+    // We add a dummy __class__ attribute in order to fool PyDoc into
+    // treating these as built-in functions and scanning their
+    // documentation
+    static PyObject* function_get_class(PyObject* /*op*/, void*)
+    {
+        return python::incref(upcast<PyObject>(&PyCFunction_Type));
+    }
+
+    static PyObject* function_get_module(PyObject* op, void*)
+    {
+        function* f = downcast<function>(op);
+        object const& ns = f->get_namespace();
+        if (!ns.is_none()) {
+            return python::incref(ns.ptr());
+        }
+        PyErr_SetString(
+            PyExc_AttributeError, const_cast<char*>(
+                "Boost.Python function __module__ unknown."));
+        return 0;
+    }
+}
+
+static PyGetSetDef function_getsetlist[] = {
+    {const_cast<char*>("__name__"), (getter)function_get_name, 0, 0, 0 },
+    {const_cast<char*>("func_name"), (getter)function_get_name, 0, 0, 0 },
+    {const_cast<char*>("__module__"), (getter)function_get_module, 0, 0, 0 },
+    {const_cast<char*>("func_module"), (getter)function_get_module, 0, 0, 0 },
+    {const_cast<char*>("__class__"), (getter)function_get_class, 0, 0, 0 },    // see note above
+    {const_cast<char*>("__doc__"), (getter)function_get_doc, (setter)function_set_doc, 0, 0},
+    {const_cast<char*>("func_doc"), (getter)function_get_doc, (setter)function_set_doc, 0, 0},
+    {NULL, 0, 0, 0, 0} /* Sentinel */
+};
+
+PyTypeObject function_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    const_cast<char*>("Boost.Python.function"),
+    sizeof(function),
+    0,
+    (destructor)function_dealloc,               /* tp_dealloc */
+    0,                                  /* tp_print */
+    0,                                  /* tp_getattr */
+    0,                                  /* tp_setattr */
+    0,                                  /* tp_compare */
+    0, //(reprfunc)func_repr,                   /* tp_repr */
+    0,                                  /* tp_as_number */
+    0,                                  /* tp_as_sequence */
+    0,                                  /* tp_as_mapping */
+    0,                                  /* tp_hash */
+    function_call,                              /* tp_call */
+    0,                                  /* tp_str */
+    0, // PyObject_GenericGetAttr,            /* tp_getattro */
+    0, // PyObject_GenericSetAttr,            /* tp_setattro */
+    0,                                  /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT /* | Py_TPFLAGS_HAVE_GC */,/* tp_flags */
+    0,                                  /* tp_doc */
+    0, // (traverseproc)func_traverse,          /* tp_traverse */
+    0,                                  /* tp_clear */
+    0,                                  /* tp_richcompare */
+    0, //offsetof(PyFunctionObject, func_weakreflist), /* tp_weaklistoffset */
+    0,                                  /* tp_iter */
+    0,                                  /* tp_iternext */
+    0,                                  /* tp_methods */
+    0, // func_memberlist,              /* tp_members */
+    function_getsetlist,                /* tp_getset */
+    0,                                  /* tp_base */
+    0,                                  /* tp_dict */
+    function_descr_get,                 /* tp_descr_get */
+    0,                                  /* tp_descr_set */
+    0, //offsetof(PyFunctionObject, func_dict),      /* tp_dictoffset */
+    0,                                      /* tp_init */
+    0,                                      /* tp_alloc */
+    0,                                      /* tp_new */
+    0,                                      /* tp_free */
+    0,                                      /* tp_is_gc */
+    0,                                      /* tp_bases */
+    0,                                      /* tp_mro */
+    0,                                      /* tp_cache */
+    0,                                      /* tp_subclasses */
+    0,                                      /* tp_weaklist */
+#if PYTHON_API_VERSION >= 1012
+    0                                       /* tp_del */
+#endif
+};
+
+object function_object(
+    py_function const& f
+    , python::detail::keyword_range const& keywords)
+{
+    return python::object(
+        python::detail::new_non_null_reference(
+            new function(
+                f, keywords.first, keywords.second - keywords.first)));
+}
+
+object function_object(py_function const& f)
+{
+    return function_object(f, python::detail::keyword_range());
+}
+
+
+handle<> function_handle_impl(py_function const& f)
+{
+    return python::handle<>(
+        allow_null(
+            new function(f, 0, 0)));
+}
+
+} // namespace objects
+
+namespace detail
+{
+  object BOOST_PYTHON_DECL make_raw_function(objects::py_function f)
+  {
+      static keyword k;
+    
+      return objects::function_object(
+          f
+          , keyword_range(&k,&k));
+  }
+  void BOOST_PYTHON_DECL pure_virtual_called()
+  {
+      PyErr_SetString(
+          PyExc_RuntimeError, const_cast<char*>("Pure virtual function called"));
+      throw_error_already_set();
+  }
+}
+
+}} // namespace boost::python