Mailman 3 June 2005 - Cplusplus-sig

RE: Wrapper for exception translation
by Gottfried.Ganssauge＠HAUFE.DE April 4, 2006

April 4, 2006

> -----Original Message----- > From: David Abrahams [mailto:dave@boost-consulting.com] > Sent: Monday, December 13, 2004 1:04 PM > To: c++-sig(a)python.org; Gottfried Ganßauge > Subject: Re: Wrapper for exception translation > > > Gottfried Ganßauge wrote: > > Hi Dave, > > > > I digged through the class_<> implementation and I think I > know what I > > must do to implement it. Like you suggested I would add another > > argument to the class_base constructor which is used as > another base > > class for the newly created class. > > Hi Gottfried, Hi Dave, > > I don't know if you're still listening, but today I offered to > implement this patch on the C++-sig (see my other post). > Are you still interested? I am still listening but was buried deeply with work so I even had to abandon the work already invested into this. Nonetheless: Yes - I'm still interested. Cheers, Gottfried P.S.: What second Post? I got 2 Copies of this one. > > > > -- > Dave Abrahams > Boost Consulting > http://www.boost-consulting.com >

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Re: exporting __stdcall methods
by David Abrahams Feb. 11, 2006

Feb. 11, 2006

"John Maddock" <john(a)johnmaddock.co.uk> writes: >> Files like boost/type_traits/detail/is_mem_fun_pointer_tester.hpp >> which are outside the Boost.Python library would need to be enhanced >> to deal with __stdcall, etc. > > Should now be fixed in cvs: provided the changes don't break anything else > of course! Fantastic! Thanks, John! -- Dave Abrahams Boost Consulting www.boost-consulting.com

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linking with a ".a" file with boost.python
by Dirgesh Patel July 6, 2005

July 6, 2005

i also have a choice of linking with a ".a" file or a ".so" file...how can i link with those kinds of file in my Jamfile? please advice

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Linking to ".la" file in Linux with JAMFILE
by Dirgesh Patel July 6, 2005

July 6, 2005

I am using BOOST in Linux with C++ and have sucessfully created my .cpp file. but now i want to take that cpp file and link it with a ".la" file that has been created from other sources. is there a way in the JamFile i can tell the "bjam" compiler to LINK the .cpp file with the .la file when done. please advice thanks much

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using libtool with boost.python
by Dirgesh Patel July 6, 2005

July 6, 2005

if i want to use libtool to compile and link all of my files in the JAMFILE with boost.python...how can i do so, here is what my Jamfile looks like currently. extension MaskUtil : # sources MaskUtil.cpp # requirements and dependencies for Boost.Python extensions <template>@boost/libs/python/build/extension ; # Declare a test for the extension module boost-python-runtest test2 : # extension modules to use <pyd>MaskUtil ;

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Re: [C++-sig] In a C++ extension, how to use a C++ class exported in another extension
by Ralf W. Grosse-Kunstleve July 5, 2005

July 5, 2005

I guess the problem is that wxDC is not wrapped with Boost.Python, but with SWIG. Therefore Boost.Python doesn't know how to extract the wxDC instance (or a reference to the instance) from the Python object. I believe this can be solved in a nice and general (via a custom from_python converter), but first I'd experiment like this (untested): void foo(boost::python::object wxDC_swig_object) { } ... def("foo", foo); Pass your SWIG-wrapped wxDC instance to foo(). This should work in any case, I hope. Once you get this working, develop the body of foo(). I'd look at the SWIG generated code for a wxPython function that accepts a wxDC object as an argument. SWIG uses PyArg_ParseTuple() to get a PyObject*; in foo() you want to use wxDC_swig_object.ptr() to get the same pointer. You have to find out how SWIG extracts the wxDC instance given the PyObject* and emulate this in the body of foo(). From within foo() you can finally call your function expecting a wxDC object. Let us know if you get this far. The next step would be to rewrite foo() as a custom converter. However, it is only worth it if you want to wrap a number of functions with wxDC in the argument list. Otherwise the "thin wrapper" approach above (foo() is the thin wrapper) is the final solution. --- Hua Su <suh(a)mails.tsinghua.edu.cn> wrote: > Hi, > > I'v learnt Boost.Python for two weeks and now encounter some problems :( > > In brief, I can't find the way to use a C++ class, which is exported in > an > > existing extension, in another extension written by myself. > > In detail, I'm writing a paint program with wxPython which is an > > extension for GUI library wxWidgets (wxWindows). I use wxPython to implement > > GUI, and use C++ to implement paint operations. > > ( In my application the paint operations is a bottleneck so I have to > implement > > is in C++ ) > > When painting, I need to pass a pointer of DC from Python to my C++ code. > > The problem is, the class "wxDC" is a real C++ class writen in wxWidgets, > > and is exported in wxPython as Python class "DC", but I need use it in my > > code as C++ class "wxDC". I can't find support from Boost.Python for > > this problem. I have tried to pass pointer "void *" instead, but Boost.Python > > declares it does not support "void *" as argument or return type. > > Could someone give me some example? I work for this problem for days :( > > Thanks for your reply. > > regards, > Clark __________________________________ Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. http://mobile.yahoo.com/learn/mail

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help with boost error
by Siddharth Ram June 30, 2005

June 30, 2005

I get the following error(s) when building ACE header files (public domain software) Here's the error: I am trying to understand the reason for the static assertion failure. removing either/boost of the class_ from the input file still results in the error. If I remove both class_ the error goes away /usr/include/boost/python/with_custodian_and_ward.hpp: In static member function `static PyObject* boost::python::with_custodian_and_ward_postcall<custodian, ward, BasePolicy_>::postcall(const ArgumentPackage&, PyObject*) [with ArgumentPackage = PyObject*, unsigned int custodian = 0u, unsigned int ward = 1u, BasePolicy_ = boost::python::default_call_policies]': /usr/include/boost/python/detail/caller.hpp:201: instantiated from `PyObject* boost::python::detail::caller_arity<2u>::impl<F, Policies, Sig>::operator()(PyObject*, PyObject*) [with F = ACE_Data_Block*(<unnamed>::ACE_Data_Block_Wrapper::*)(long unsigned int) const, Policies = boost::python::return_internal_reference<1u, boost::python::default_call_policies>, Sig = boost::mpl::vector3<ACE_Data_Block*, <unnamed>::ACE_Data_Block_Wrapper&, long unsigned int>]' /usr/include/boost/python/object/py_function.hpp:38: instantiated from `PyObject* boost::python::objects::caller_py_function_impl<Caller>::operator()(PyObject*, PyObject*) [with Caller = boost::python::detail ::caller<ACE_Data_Block*(<unnamed>::ACE_Data_Block_Wrapper::*)(long unsigned int) const, boost::python::return_internal_reference<1u, boost::python::default_call_policies>, boost::mpl::vector3<ACE_Data_Block*, <unnamed>::ACE_Data_Block_Wrapper&, long unsigned int> >]' test/protocol/ranc/RLP/python/boost/ace.cpp:103: instantiated from here /usr/include/boost/python/with_custodian_and_ward.hpp:87: warning: comparison of unsigned expression < 0 is always false /usr/include/boost/python/object/make_instance.hpp: In static member function `static PyObject* boost::python::objects::make_instance_impl<T, Holder, Derived>::execute(Arg&) [with Arg = char*, T = char, Holder = boost::python::objects::pointer_holder<char*, char>, Derived = boost::python::objects::make_ptr_instance<char, boost::python::objects::pointer_holder<char*, char> >]': /usr/include/boost/python/to_python_indirect.hpp:96: instantiated from `static PyObject* boost::python::detail::make_reference_holder::execute(T*) [with T = char]' /usr/include/boost/python/to_python_indirect.hpp:60: instantiated from `PyObject* boost::python::to_python_indirect<T, MakeHolder>::execute(const U&, mpl_::false_) const [with U = char, T = char*, MakeHolder = boost::python::detail::make_reference_holder]' /usr/include/boost/python/to_python_indirect.hpp:48: instantiated from `PyObject* boost::python::to_python_indirect<T, MakeHolder>::execute(U*, mpl_::true_) const [with U = char, T = char*, MakeHolder = boost::python::detail::make_reference_holder]' /usr/include/boost/python/to_python_indirect.hpp:37: instantiated from `PyObject* boost::python::to_python_indirect<T, MakeHolder>::operator()(const U&) const [with U = char*, T = char*, MakeHolder = boost::python::detail::make_reference_holder]' /usr/include/boost/python/detail/invoke.hpp:88: instantiated from `PyObject* boost::python::detail::invoke(boost::python::detail::invoke_tag_< false, true>, const RC&, F&, TC&) [with RC = boost::python::to_python_indirect<char*, boost::python::detail::make_reference_holder>, F = char*(ACE_Data_Block::*)() const, TC = boost::python::arg_from_python<ACE_Data_Block&>]' /usr/include/boost/python/detail/caller.hpp:199: instantiated from `PyObject* boost::python::detail::caller_arity<1u>::impl<F, Policies, Sig>::operator()(PyObject*, PyObject*) [with F = char*(ACE_Data_Block::*)() const, Policies = boost::python::return_internal_reference<1u, boost::python::default_call_policies>, Sig = boost::mpl::vector2<char*, ACE_Data_Block&>]' /usr/include/boost/python/object/py_function.hpp:38: instantiated from `PyObject* boost::python::objects::caller_py_function_impl<Caller>::operator()(PyObject*, PyObject*) [with Caller = boost::python::detail::caller<char*(ACE_Data_Block::*)() const, boost::python::return_internal_reference<1u, boost::python::default_call_policies>, boost::mpl::vector2<char*, ACE_Data_Block&> >]' test/protocol/ranc/RLP/python/boost/ace.cpp:103: instantiated from here /usr/include/boost/python/object/make_instance.hpp:24: error: incomplete type `boost::STATIC_ASSERTION_FAILURE< false>' used in nested name specifier /usr/include/boost/python/object/make_instance.hpp:24: error: size of array has non-integral type `<type error>' The input file is attached. thanks for your help

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Re: [C++-sig] Linking files in JAMFILE with boost
by Jens B. Jorgensen June 30, 2005

June 30, 2005

The canonical method for this is to invoke 'libtool'. You can check out an example here: http://www.gnu.org/software/libtool/manual.html#Linking-executables I'm by no means any kind of expert or even really a novice with libtool. I've mucked about in open source projects that were set up to build with it and that's about it. -----Original Message----- From: c++-sig-bounces(a)python.org [mailto:c++-sig-bounces@python.org] On Behalf Of David Abrahams Sent: Thursday, June 30, 2005 8:47 AM To: c++-sig(a)python.org Subject: Re: [C++-sig] Linking files in JAMFILE with boost "Jens B. Jorgensen" <jorgensen(a)getcollc.com> writes: > An .la file is a meta-file produced by libtool. It contains > information about the real library and meta-information detailing the > specifics of linking to it. And what would you do from the command-line in order to link to an .la file "manually?" -- Dave Abrahams Boost Consulting www.boost-consulting.com _______________________________________________ C++-sig mailing list C++-sig(a)python.org http://mail.python.org/mailman/listinfo/c++-sig

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Re: [C++-sig] Linking files in JAMFILE with boost
by Jens B. Jorgensen June 30, 2005

June 30, 2005

An .la file is a meta-file produced by libtool. It contains information about the real library and meta-information detailing the specifics of linking to it. -----Original Message----- From: c++-sig-bounces(a)python.org [mailto:c++-sig-bounces@python.org] On Behalf Of David Abrahams Sent: Thursday, June 30, 2005 7:04 AM To: c++-sig(a)python.org Subject: Re: [C++-sig] Linking files in JAMFILE with boost "Dirgesh Patel" <dirgesh.patel(a)hp.com> writes: > I am using BOOST in Linux with C++ and have sucessfully created my > .cpp file. > > but now i want to take that cpp file and link it with a ".la" file > that has been created from other sources. is there a way in the > JamFile i can tell the "bjam" compiler to LINK the .cpp file with the > .la file when done. > > please advice What is a .la file? I'd know the answer if you asked about a file with extension .a, .o, or .so, but I've never heard of a .la file. -- Dave Abrahams Boost Consulting www.boost-consulting.com _______________________________________________ C++-sig mailing list C++-sig(a)python.org http://mail.python.org/mailman/listinfo/c++-sig

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Linking files in JAMFILE with boost
by Dirgesh Patel June 30, 2005

June 30, 2005

I am using BOOST in Linux with C++ and have sucessfully created my .cpp file. but now i want to take that cpp file and link it with a ".la" file that has been created from other sources. is there a way in the JamFile i can tell the "bjam" compiler to LINK the .cpp file with the .la file when done. please advice thanks much

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