A quick question about Initializer-List in C++0x

Hi Everybody!

I just tried to compile the following with gcc-4.5 in c++0x mode:

int main (int argc, char* argv[])
{
   std::map<std::string, std::vector<std::string>> m {
     {"Hello", {"Good", "World"}},
     {"Goodbye", {"Rude", "World"}}
   };
   return 0;
}

However I get compilation errors when I do that (the errors are at the
bottom of this mail), if I however explicitly call the
std::vector<std::string>() constructor like this:

int main (int argc, char* argv[])
{
   std::map<std::string, std::vector<std::string>> m {
     {"Hello", std::vector<std::string>({"Good", "World"})},
     {"Goodbye", std::vector<std::string>({"Rude", "World"})}
   };
   return 0;
}

It however works correctly. I just wanted to know if this is supposed
to work before I file a bug on gcc.

With kind regards,

Mikael Olenfalk

PS: For your reference, here are the errors:

map.cpp: In function 'int main(int, char**)':
map.cpp:12:3: error: no matching function for call to
'std::map<std::basic_string<char>, std::vector<std::basic_string<char>


/usr/lib/gcc-snapshot/lib/gcc/i486-linux-gnu/4.5.0/../../../../include/
c++/4.5.0/bits/stl_map.h:195:7: note: candidates are: std::map<_Key,
_Tp, _Compare, _Alloc>::map(std::initializer_list<std::pair<const
_Key, _Tp> >, const _Compare&, const allocator_type&) [with _Key =
std::basic_string<char>, _Tp = std::vector<std::basic_string<char> >,
_Compare = std::less<std::basic_string<char> >, _Alloc =
std::allocator<std::pair<const std::basic_string<char>,
std::vector<std::basic_string<char> > > >, allocator_type =
std::allocator<std::pair<const std::basic_string<char>,
std::vector<std::basic_string<char> > > >]
/usr/lib/gcc-snapshot/lib/gcc/i486-linux-gnu/4.5.0/../../../../include/
c++/4.5.0/bits/stl_map.h:181:7: note: std::map<_Key,
_Tp, _Compare, _Alloc>::map(std::map<_Key, _Tp, _Compare, _Alloc>&&)
[with _Key = std::basic_string<char>, _Tp =
std::vector<std::basic_string<char> >, _Compare =
std::less<std::basic_string<char> >, _Alloc =
std::allocator<std::pair<const std::basic_string<char>,
std::vector<std::basic_string<char> > > >, std::map<_Key, _Tp,
_Compare, _Alloc> = std::map<std::basic_string<char>,
std::vector<std::basic_string<char> > >]
/usr/lib/gcc-snapshot/lib/gcc/i486-linux-gnu/4.5.0/../../../../include/
c++/4.5.0/bits/stl_map.h:170:7: note: std::map<_Key,
_Tp, _Compare, _Alloc>::map(const std::map<_Key, _Tp, _Compare,
_Alloc>&) [with _Key = std::basic_string<char>, _Tp =
std::vector<std::basic_string<char> >, _Compare =
std::less<std::basic_string<char> >, _Alloc =
std::allocator<std::pair<const std::basic_string<char>,
std::vector<std::basic_string<char> > > >, std::map<_Key, _Tp,
_Compare, _Alloc> = std::map<std::basic_string<char>,
std::vector<std::basic_string<char> > >]
/usr/lib/gcc-snapshot/lib/gcc/i486-linux-gnu/4.5.0/../../../../include/
c++/4.5.0/bits/stl_map.h:159:7: note: std::map<_Key,
_Tp, _Compare, _Alloc>::map(const _Compare&, const allocator_type&)
[with _Key = std::basic_string<char>, _Tp =
std::vector<std::basic_string<char> >, _Compare =
std::less<std::basic_string<char> >, _Alloc =
std::allocator<std::pair<const std::basic_string<char>,
std::vector<std::basic_string<char> > > >, allocator_type =
std::allocator<std::pair<const std::basic_string<char>,
std::vector<std::basic_string<char> > > >]
/usr/lib/gcc-snapshot/lib/gcc/i486-linux-gnu/4.5.0/../../../../include/
c++/4.5.0/bits/stl_map.h:150:7: note: std::map<_Key,
_Tp, _Compare, _Alloc>::map() [with _Key = std::basic_string<char>,
_Tp = std::vector<std::basic_string<char> >, _Compare =
std::less<std::basic_string<char> >, _Alloc =
std::allocator<std::pair<const std::basic_string<char>,
std::vector<std::basic_string<char> > > >]

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