c++ - Ambiguity when using boost::assign::list_of to construct a std::vector -

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this code:

std::vector<int>(boost::assign::list_of<int>(1)(2)(3));

gives error:

main.cpp: in member function 'void <unnamed>::requesthandler::processrequest(foo&, bar, unsigned int, unsigned int*, const char*, boost::shared_ptr<baz::ioutput>&)': main.cpp:450: error: call of overloaded 'vector(boost::assign_detail::generic_list<int>&)' ambiguous /4.4.2/bits/stl_vector.h:241: note: candidates are: std::vector<_tp, _alloc>::vector(const std::vector<_tp, _alloc>&) [with _tp = int, _alloc = std::allocator<int>] /4.4.2/bits/stl_vector.h:227: note:                 std::vector<_tp, _alloc>::vector(size_t, const _tp&, const _alloc&) [with _tp = int, _alloc = std::allocator<int>] /4.4.2/bits/stl_vector.h:215: note:                 std::vector<_tp, _alloc>::vector(const _alloc&) [with _tp = int, _alloc = std::allocator<int>]

when compiled gcc 4.4.2.

how can revolve issue? i'm trying compile following:

using namespace std; using namespace boost::assign;  typedef boost::variant<vector<bool>, vector<int>, vector<string> > container;  vector<pair<string, container > > v =             list_of(pair<string, container >("scotland",container(vector<int>(list_of<int>(1)(2)(3)))))             (pair<string, container >("sweden",container()));

this fails same reason.

my application involves setting data structures purposes of unit testing. want initialization clear rather having lots of push_backs etc.

update:

here fix:

std::vector<std::pair<std::string, container > > v =     boost::assign::list_of(std::pair<std::string, container >("scotland",container(boost::assign::list_of(1)(2)(3).convert_to_container<std::vector<int> >())))     (std::pair<std::string, container >("sweden",container()));

this ugly. might make clearer. unit tests written in header files don't use using namespace.

this dupe of ambiguous call list_of in vs2010. boost.assign written targeting c++03 standard library. things changed in c++11 , boost.assign hasn't been updated. bug report here.


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