Re: [boost] [BGL] [variant] problem (and perhaps solution?) with strong_components.hpp and variant

Subject: Re: [boost] [BGL] [variant] problem (and perhaps solution?) with strong_components.hpp and variant
From: Nil Geisweiller (ngeiswei_at_[hidden])
Date: 2009-10-30 03:16:39

It is weird, I tried with 2 settings

Ubuntu 9.04, gcc-4.3.3, boost 1.40
Ubuntu 9.10, gcc-4.4.1, boost 1.40

And I get the compiling errors:

/usr/include/boost/property_map/property_map.hpp: In instantiation of
‘boost::property_traits<int>’:
/usr/include/boost/graph/two_bit_color_map.hpp:46:   instantiated from
‘boost::two_bit_color_map<int>’
/home/a-lin/Sources/test/test.cpp:10:   instantiated from here
/usr/include/boost/property_map/property_map.hpp:31: error: ‘int’ is
not a class, struct, or union type
/usr/include/boost/property_map/property_map.hpp:32: error: ‘int’ is
not a class, struct, or union type
/usr/include/boost/property_map/property_map.hpp:33: error: ‘int’ is
not a class, struct, or union type
/usr/include/boost/property_map/property_map.hpp:34: error: ‘int’ is
not a class, struct, or union type

Has anyone experienced problem too?

Thanks
Nil

On Thu, Oct 29, 2009 at 4:07 PM, Jeffrey Hellrung <jhellrung_at_[hidden]> wrote:
> Nil Geisweiller wrote:
>>>
>>> Hi,
>>>
>>> it seems there is a conflict between strong_components.hpp and
>>> variant, maybe the method boost::get is wrongly overloaded.
>>>
>>> The problem occurs with 1.40 but not with 1.37, and it is still occurs
>>> with the last svn.
>>>
>>> I attach a minimal code to reproduce the bug + compile error
>>>
>>> ######
>>> test.cpp
>>> ######
>>>
>>> //uncomment the line below to get the bug
>>> #include <boost/graph/strong_components.hpp>
>>> #include <boost/variant.hpp>
>>>
>>> typedef boost::variant < int, float > intorfloat;
>>>
>>> int main() {
>>>  int i(2);
>>>  intorfloat iof(i);
>>>  return boost::get<int>(iof); //problem is here
>>> }
>>>
>
> Works for me :/  MSVC 2008, Vista, Boost 1.40.
>
> - Jeff
>
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