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d4e06ac436
Boost.Python. The major change is that, instead of being
boost::function2<PyObject*,PyObject*,PyObject*>, py_function is now a
runtime-polymorphic wrapper for compile-time polymorphic
behavior (just like function) of our own which carries more
information/behaviors. In particular, you can retrieve an array of
c-strings describing the types in the function signature.
Additionally, the minimum and maximum arity are stored in the
py_function object instead of in the 'function' object which wraps it.
* data_members.hpp -
Adjustments for the new py_function. Workarounds for CodeWarrior
Pro 8.3 bugs in function template argument deduction with
pointers-to-members.
* has_back_reference.hpp, test/back_reference.cpp,
test/select_holder.cpp -
Updated to follow the metafunction protocol
* init.hpp, detail/defaults_gen.hpp -
Make Keywords a more-specific type in function signatures to
prevent string literals that show up as char[N] from binding to
the wrong argument (at least Intel 7.1 for Windows does this).
* make_function.hpp -
Adjustments for the new py_function. Arities are now computed
by caller<>.
* opaque_pointer_converter.hpp, type_id.hpp -
Use BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS facilities;
generate specializations that all compilers can handle.
* raw_function.hpp -
Adjustments for the new py_function.
* caller.hpp -
Added arity and signature type name reporting.
* detail/config.hpp
Enable __declspec(dllexport) for Cygwin, thereby fixing the
recent horrible Cygwin linking problems.
* detail/msvc_typeinfo.hpp -
Always pass boost::type<T>* explicitly, thereby working around
incompatible notions of how to specialize function templates with
default arguments on various compilers.
* object/function.hpp
, object/function_handle.hpp
, object/function_object.hpp
, object/function_object.cpp
Adjustments for the new py_function. Arities are carried by
py_function.
* object/iterator.hpp, object/iterator.cpp
Adjustments for the new py_function; we have to compute a
signature of types to construct it with.
* object/py_function.hpp
Removed dependency on boost::function; see the comment at the
top of this entry for more details.
* object/select_holder.hpp
Clean up to more closely follow MPL idioms.
* test/Jamfile -
Adjust the embedding test for the new Cygwin use of declspec.
Update bases and pointee tests with missing properties.
* test/input_iterator.cpp -
Updates for the new iterator adaptors.
* test/opaque.py -
Add Python encoding comment to suppress PendinDeprecationWarning
with recent Python builds.
* test/str.cpp
Pass a Python long instead of a float to string.expandtabs,
suppressing a PendinDeprecationWarning with recent Python builds.
* libs/utility/counting_iterator_example.cpp
Borland workaround
* libs/utility/indirect_iterator_example.cpp
const-correctness fix.
*
[SVN r19247]
113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
// Copyright David Abrahams 2002. Permission to copy, use,
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// modify, sell and distribute this software is granted provided this
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// copyright notice appears in all copies. This software is provided
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// "as is" without express or implied warranty, and with no claim as
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// to its suitability for any purpose.
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#include <boost/python/class.hpp>
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#include <boost/python/module.hpp>
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#include <boost/python/def.hpp>
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#include <boost/python/has_back_reference.hpp>
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#include <boost/python/back_reference.hpp>
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#include <boost/ref.hpp>
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#include <boost/utility.hpp>
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#include <memory>
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#include <cassert>
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#include <boost/python/copy_const_reference.hpp>
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#include <boost/python/return_value_policy.hpp>
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#include <boost/mpl/bool.hpp>
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// This test shows that a class can be wrapped "as itself" but also
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// acquire a back-reference iff has_back_reference<> is appropriately
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// specialized.
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using namespace boost::python;
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struct X
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{
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explicit X(int x) : x(x), magic(7654321) { ++counter; }
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X(X const& rhs) : x(rhs.x), magic(7654321) { ++counter; }
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virtual ~X() { assert(magic == 7654321); magic = 6666666; x = 9999; --counter; }
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void set(int x) { assert(magic == 7654321); this->x = x; }
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int value() const { assert(magic == 7654321); return x; }
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static int count() { return counter; }
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private:
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void operator=(X const&);
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private:
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int x;
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long magic;
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static int counter;
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};
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int X::counter;
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struct Y : X
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{
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Y(PyObject* self, int x) : X(x) {};
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Y(PyObject* self, Y const& rhs) : X(rhs), self(self) {};
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private:
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Y(Y const&);
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PyObject* self;
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};
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struct Z : X
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{
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Z(PyObject* self, int x) : X(x) {};
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Z(PyObject* self, Z const& rhs) : X(rhs), self(self) {};
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private:
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Z(Z const&);
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PyObject* self;
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};
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Y const& copy_Y(Y const& y) { return y; }
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Z const& copy_Z(Z const& z) { return z; }
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namespace boost { namespace python
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{
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template <>
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struct has_back_reference<Y>
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: mpl::true_
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{
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};
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template <>
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struct has_back_reference<Z>
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: mpl::true_
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{
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};
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}}
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// prove that back_references get initialized with the right PyObject*
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object y_identity(back_reference<Y const&> y)
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{
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return y.source();
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}
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// prove that back_references contain the right value
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bool y_equality(back_reference<Y const&> y1, Y const& y2)
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{
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return &y1.get() == &y2;
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}
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BOOST_PYTHON_MODULE(back_reference_ext)
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{
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def("copy_Y", copy_Y, return_value_policy<copy_const_reference>());
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def("copy_Z", copy_Z, return_value_policy<copy_const_reference>());
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def("x_instances", &X::count);
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class_<Y>("Y", init<int>())
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.def("value", &Y::value)
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.def("set", &Y::set)
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;
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class_<Z,std::auto_ptr<Z> >("Z", init<int>())
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.def("value", &Z::value)
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.def("set", &Z::set)
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;
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def("y_identity", y_identity);
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def("y_equality", y_equality);
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}
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#include "module_tail.cpp"
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