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Date: Sun, 28 Nov 2010 03:38:00 -0000
From: =?utf-8?B?6Zmz6Z+L5Lu7?= <chenwj@iis.sinica.edu.tw>
To: gcc-help@gcc.gnu.org
Subject: Fail to compile Boost make_shared when -std=c++0x on
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Hi,

  I don't know this is a bug or not. Here is the example code:

// test.cpp
#include <vector>
#include <boost/make_shared.hpp>
#include <boost/shared_ptr.hpp>

int main()
{
  using namespace boost;
  shared_ptr<std::vector<int> > x =3D
    make_shared<std::vector<int> >(10);
}

  I use g++45 and g++46 installed from ports on FreeBSD. Everything
is fine when I compile the code without any option. However, when I
turn the option "-std=3Dc++0x" on, g++ give me the error messge below:

In file included from /usr/local/include/boost/make_shared.hpp:15:0,
                 from test.cpp:2:
/usr/local/include/boost/smart_ptr/make_shared.hpp: In function
'boost::shared_ptr<X> boost::make_shared(Args&& ...) [with T =3D
std::vector<int>, Args =3D int]':
test.cpp:9:38:   instantiated from here
/usr/local/include/boost/smart_ptr/make_shared.hpp:148:5: error: no
matching function for call to 'forward(int&)'
/usr/local/include/boost/smart_ptr/make_shared.hpp:90:40: note:
candidate is: template<class T> T&& boost::detail::forward(T&&)

  And here are gcc versions:

g++46 (GCC) 4.6.0 20101023 (experimental)
g++45 (GCC) 4.5.2 20101021 (prerelease)

  Any suggestion appreciated.

Regards,
chenwj

--=20
Wei-Ren Chen (=E9=99=B3=E9=9F=8B=E4=BB=BB)
Tel:886-2-2788-3799 #1667
Parallel Processing Lab, Institute of Information Science,
  Academia Sinica, Taiwan (R.O.C.)