Subject: [Boost-bugs] [Boost C++ Libraries] #4003: Error in destroy.hpp when methods "T()" and "operator~()" are defined.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-03-13 18:16:03
#4003: Error in destroy.hpp when methods "T()" and "operator~()" are defined.
------------------------------------------------------+---------------------
Reporter: Christopher Bruns <cmbruns@…> | Owner: dave
Type: Bugs | Status: new
Milestone: Boost 1.43.0 | Component: Python
Version: Boost 1.42.0 | Severity: Problem
Keywords: |
------------------------------------------------------+---------------------
I am wrapping a large library using boost python and Py++. I encountered
a peculiar situation with one of the wrapped classes.
I have attached a minimal example and an imperfect patch (see below).
The problem occurs on line 33 of boost/python/detail/destroy.hpp:
{{{
unpatched version:
=================
30 template <class T>
31 static void execute(T const volatile* p)
32 {
33 p->T::~T();
34 }
}}}
The problem is that the class being wrapped has a member function "T()",
and the class returned by that function has an "operator~()"; which leads
to a compile error. I have been working around this for the past year by
patching the file destroy.hpp to use the name "Type" instead of "T" in
this section, each time I install a new version of boost.
{{{
patched version:
===============
30 template <class Type>
31 static void execute(Type const volatile* p)
32 {
33 p->Type::~Type();
34 }
}}}
That's not a complete solution, of course. I suspect I could concoct
another scenario with classes that have a "Type" method etc. But it
solves the problem for me with the libraries I am actually wrapping.
Perhaps you C++ gurus could come up with a more robust approach.
With the patch in place, my module compiles. Without the patch, I get
these compiler messages:
#############################################################
building 'foo_module' extension
C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe /c /nologo /Ox
/MD /W3 /GS - /DNDEBUG "-IC:/Program
Files/boost/boost_1_42" -I. -Ic:\Python26\include -Ic:\Pytho
n26\PC /Tpwrap_foo.cpp /Fobuild\temp.win32-2.6\Release\wrap_foo.obj /EHsc
-D"_HAS_TR1 =0"
wrap_foo.cpp
C:/Program Files/boost/boost_1_42\boost/python/detail/destroy.hpp(33) :
error C2523: 'Foo3::~T' : destructor tag mismatch
C:/Program
Files/boost/boost_1_42\boost/python/detail/destroy.hpp(95) : see reference
to function template instantiation 'void
boost::python::detail::value_destroyer<false>::execute<const T>(volatile
const T *)' being compiled
with
[
T=const Foo3
]
C:/Program
Files/boost/boost_1_42\boost/python/detail/destroy.hpp(101) : see
reference to function template instantiation 'void
boost::python::detail::destroy_referent_impl<T>(void *,T &(__cdecl
*)(void))' being compiled
with
[
T=const Foo3
]
C:/Program
Files/boost/boost_1_42\boost/python/converter/rvalue_from_python_data.hpp(135)
: see reference to function template instantiation 'void
boost::python::detail::destroy_referent<const Foo3&>(void *,T (__cdecl
*)(void))' being compiled
with
[
T=const Foo3 &
]
C:/Program
Files/boost/boost_1_42\boost/python/converter/rvalue_from_python_data.hpp(133)
: while compiling class template member function
'boost::python::converter::rvalue_from_python_data<T>::~rvalue_from_python_data(void)'
with
[
T=const Foo3 &
]
C:/Program
Files/boost/boost_1_42\boost/python/converter/arg_from_python.hpp(124) :
see reference to class template instantiation
'boost::python::converter::rvalue_from_python_data<T>' being compiled
with
[
T=const Foo3 &
]
C:/Program
Files/boost/boost_1_42\boost/python/arg_from_python.hpp(27) : see
reference to class template instantiation
'boost::python::converter::arg_rvalue_from_python<T>' being compiled
with
[
T=const Foo3 &
]
C:/Program
Files/boost/boost_1_42\boost/preprocessor/iteration/detail/local.hpp(37) :
see reference to class template instantiation
'boost::python::arg_from_python<T>' being compiled
with
[
T=const Foo3 &
]
C:/Program
Files/boost/boost_1_42\boost/python/detail/caller.hpp(200) : while
compiling class template member function 'PyObject
*boost::python::detail::caller_arity<2>::impl<F,Policies,Sig>::operator
()(PyObject *,PyObject *)'
with
[
F=void (__thiscall Foo4::* )(const Foo3 &),
Policies=boost::python::default_call_policies,
Sig=boost::mpl::vector3<void,Foo4 &,const Foo3 &>
]
C:/Program
Files/boost/boost_1_42\boost/python/detail/caller.hpp(169) : see reference
to class template instantiation
'boost::python::detail::caller_arity<2>::impl<F,Policies,Sig>' being
compiled
with
[
F=void (__thiscall Foo4::* )(const Foo3 &),
Policies=boost::python::default_call_policies,
Sig=boost::mpl::vector3<void,Foo4 &,const Foo3 &>
]
C:/Program
Files/boost/boost_1_42\boost/python/make_function.hpp(61) : see reference
to class template instantiation
'boost::python::detail::caller<F,CallPolicies,Sig>' being compiled
with
[
F=void (__thiscall Foo4::* )(const Foo3 &),
CallPolicies=boost::python::default_call_policies,
Sig=boost::mpl::vector3<void,Foo4 &,const Foo3 &>
]
C:/Program
Files/boost/boost_1_42\boost/python/make_function.hpp(146) : see reference
to function template instantiation 'boost::python::api::object
boost::python::detail::make_function_aux<F,CallPolicies,Signature,boost::mpl::int_<N>>(F,const
CallPolicies &,const Sig &,const boost::python::detail::keyword_range
&,NumKeywords)' being compiled
with
[
F=void (__thiscall Foo4::* )(const Foo3 &),
CallPolicies=boost::python::default_call_policies,
Signature=boost::mpl::vector3<void,Foo4 &,const Foo3 &>,
N=1,
Sig=boost::mpl::vector3<void,Foo4 &,const Foo3 &>,
NumKeywords=boost::mpl::int_<1>
]
C:/Program Files/boost/boost_1_42\boost/python/class.hpp(544) :
see reference to function template instantiation
'boost::python::api::object
boost::python::make_function<Fn,boost::python::default_call_policies,T1,boost::mpl::vector3<T0,Foo4
&,T2>>(F,const CallPolicies &,const Keywords &,const Signature &)' being
compiled
with
[
Fn=void (__thiscall Foo4::* )(const Foo3 &),
T1=boost::python::detail::keywords<1>,
T0=void,
T2=const Foo3 &,
F=void (__thiscall Foo4::* )(const Foo3 &),
CallPolicies=boost::python::default_call_policies,
Keywords=boost::python::detail::keywords<1>,
Signature=boost::mpl::vector3<void,Foo4 &,const Foo3 &>
]
C:/Program Files/boost/boost_1_42\boost/python/class.hpp(614) :
see reference to function template instantiation 'void
boost::python::class_<W>::def_impl<Foo4,Fn,boost::python::detail::def_helper<T1>>(T
*,const char *,Fn,const Helper &,...)' being compiled
with
[
W=Foo4,
Fn=void (__thiscall Foo4::* )(const Foo3 &),
T1=boost::python::detail::keywords<1>,
T=Foo4,
Helper=boost::python::detail::def_helper<boost::python::detail::keywords<1>>
]
C:/Program Files/boost/boost_1_42\boost/python/class.hpp(244) :
see reference to function template instantiation 'void
boost::python::class_<W>::def_maybe_overloads<A1,A2>(const char *,Fn,const
boost::python::detail::keywords<1> &,...)' being compiled
with
[
W=Foo4,
A1=void (__thiscall Foo4::* )(const Foo3 &),
A2=boost::python::detail::keywords<1>,
Fn=void (__thiscall Foo4::* )(const Foo3 &)
]
wrap_foo.cpp(21) : see reference to function template
instantiation 'boost::python::class_<W>
&boost::python::class_<W>::def<void(__thiscall Foo4::* )(const Foo3
&),boost::python::detail::keywords<1>>(const char *,A1,const A2 &)' being
compiled
with
[
W=Foo4,
A1=void (__thiscall Foo4::* )(const Foo3 &),
A2=boost::python::detail::keywords<1>
]
error: command '"C:\Program Files\Microsoft Visual Studio
9.0\VC\BIN\cl.exe"' failed with exit status 2
#########################################################
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/4003> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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