id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
4223	boost::python exception translator causes ambiguous call errors with Visual Studio 2010	blaquee@…	Dave Abrahams	"There is an occasion where the use of the register_exception_translator template function causes:
error C2668: 'boost::bind' : ambiguous call to overloaded function

the particular file and line are located here:
https://svn.boost.org/trac/boost/browser/trunk/boost/python/exception_translator.hpp

Line 21, where the call to bind is not properly scoped to a namespace and causes the compiler to resolve incorrectly. The error looks like this:


{{{
D:\boost_1_42\boost/python/exception_translator.hpp(21): error C2668: 'boost::bind' : ambiguous call to overloaded function
1>          D:\boost_1_42\boost/bind/bind.hpp(1322): could be 'boost::_bi::bind_t<R,F,L> boost::bind<bool,boost::python::detail::translate_exception<ExceptionType,Translate>,boost::arg<I>,boost::arg<2>,Translate>(F,A1,A2,A3)'
1>          with
1>          [
1>              R=bool,
1>              F=boost::python::detail::translate_exception<WSException,init_module_wshook::WSExceptionTranslator>,
1>              L=boost::_bi::list3<boost::arg<1>,boost::arg<2>,boost::_bi::value<init_module_wshook::WSExceptionTranslator>>,
1>              ExceptionType=WSException,
1>              Translate=init_module_wshook::WSExceptionTranslator,
1>              I=1,
1>              A1=boost::arg<1>,
1>              A2=boost::arg<2>,
1>              A3=init_module_wshook::WSExceptionTranslator
1>          ]
1>          C:\Program Files\Microsoft Visual Studio 10.0\VC\include\xxbind1(323): or       'std::tr1::_Bind<_Result_type,_Ret,_BindN> std::tr1::bind<bool,boost::python::detail::translate_exception<ExceptionType,Translate>,boost::arg<I>,boost::arg<2>,Translate>(_Fty,_Arg0,_Arg1,_Arg2)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _Result_type=bool,
1>              _Ret=bool,
1>              _BindN=std::tr1::_Bind3<std::tr1::_Callable_obj<boost::python::detail::translate_exception<WSException,init_module_wshook::WSExceptionTranslator>,false>,boost::arg<1>,boost::arg<2>,init_module_wshook::WSExceptionTranslator>,
1>              ExceptionType=WSException,
1>              Translate=init_module_wshook::WSExceptionTranslator,
1>              I=1,
1>              _Fty=boost::python::detail::translate_exception<WSException,init_module_wshook::WSExceptionTranslator>,
1>              _Arg0=boost::arg<1>,
1>              _Arg1=boost::arg<2>,
1>              _Arg2=init_module_wshook::WSExceptionTranslator
1>          ]
1>          while trying to match the argument list '(boost::python::detail::translate_exception<ExceptionType,Translate>, boost::arg<I>, boost::arg<I>, init_module_wshook::WSExceptionTranslator)'
1>          with
1>          [
1>              ExceptionType=WSException,
1>              Translate=init_module_wshook::WSExceptionTranslator
1>          ]
1>          and
1>          [
1>              I=1
1>          ]
1>          and
1>          [
1>              I=2
1>          ]
1>          wspluginmanager_python.cpp(179) : see reference to function template instantiation 'void boost::python::register_exception_translator<WSException,init_module_wshook::WSExceptionTranslator>(Translate,boost::type<T> *)' being compiled
1>          with
1>          [
1>              Translate=init_module_wshook::WSExceptionTranslator,
1>              T=WSException
1>          ]
1>
}}}

The line of code that would cause such an error is:

{{{
py::register_exception_translator<WSException>(WSExceptionTranslator());
}}}

namespace py = boost::python

The fix for this would be to properly use boost::bind at line 21 and cause it to resolve properly on Visual Studio 2010 RTM.

Thank you.

"	Bugs	closed	Boost 1.43.0	python USE GITHUB	Boost 1.42.0	Problem	fixed