使用boost :: assign :: list_of初始化std :: vector <std :: vector <int>>

Question

如何使用boost :: assign :: list_of将值放入std::vector<std::vector<int> >类型的对象中？或者你有任何其他的建议，我可以如何填充单元测试的目的？

修订

我得到海合会以下编译器错误4.4.2

gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/4.4.2/bits/stl_uninitialized.h: In static member function 'static _ForwardIterator std::__uninitialized_copy<<anonymous> >::uninitialized_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = std::_Deque_iterator<boost::assign_detail::generic_list<int>, boost::assign_detail::generic_list<int>&, boost::assign_detail::generic_list<int>*>, _ForwardIterator = std::vector<int, std::allocator<int> >*, bool <anonymous> = false]': 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/4.4.2/bits/stl_uninitialized.h:117: instantiated from '_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = std::_Deque_iterator<boost::assign_detail::generic_list<int>, boost::assign_detail::generic_list<int>&, boost::assign_detail::generic_list<int>*>, _ForwardIterator = std::vector<int, std::allocator<int> >*]' 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/4.4.2/bits/stl_uninitialized.h:257: instantiated from '_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator, _ForwardIterator, std::allocator<_Tp>&) [with _InputIterator = std::_Deque_iterator<boost::assign_detail::generic_list<int>, boost::assign_detail::generic_list<int>&, boost::assign_detail::generic_list<int>*>, _ForwardIterator = std::vector<int, std::allocator<int> >*, _Tp = std::vector<int, std::allocator<int> >]' 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/4.4.2/bits/stl_vector.h:1024: instantiated from 'void std::vector<_Tp, _Alloc>::_M_range_initialize(_ForwardIterator, _ForwardIterator, std::forward_iterator_tag) [with _ForwardIterator = std::_Deque_iterator<boost::assign_detail::generic_list<int>, boost::assign_detail::generic_list<int>&, boost::assign_detail::generic_list<int>*>, _Tp = std::vector<int, std::allocator<int> >, _Alloc = std::allocator<std::vector<int, std::allocator<int> > >]' 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/4.4.2/bits/stl_vector.h:1002: instantiated from 'void std::vector<_Tp, _Alloc>::_M_initialize_dispatch(_InputIterator, _InputIterator, std::__false_type) [with _InputIterator = std::_Deque_iterator<boost::assign_detail::generic_list<int>, boost::assign_detail::generic_list<int>&, boost::assign_detail::generic_list<int>*>, _Tp = std::vector<int, std::allocator<int> >, _Alloc = std::allocator<std::vector<int, std::allocator<int> > >]' 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/4.4.2/bits/stl_vector.h:303: instantiated from 'std::vector<_Tp, _Alloc>::vector(_InputIterator, _InputIterator, const _Alloc&) [with _InputIterator = std::_Deque_iterator<boost::assign_detail::generic_list<int>, boost::assign_detail::generic_list<int>&, boost::assign_detail::generic_list<int>*>, _Tp = std::vector<int, std::allocator<int> >, _Alloc = std::allocator<std::vector<int, std::allocator<int> > >]' 
/boost/boost_1_51_0/boost/assign/list_of.hpp:163: instantiated from 'Container boost::assign_detail::converter<DerivedTAssign, Iterator>::convert(const Container*, boost::assign_detail::default_type_tag) const [with Container = std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >, DerivedTAssign = boost::assign_detail::generic_list<boost::assign_detail::generic_list<int> >, Iterator = std::_Deque_iterator<boost::assign_detail::generic_list<int>, boost::assign_detail::generic_list<int>&, boost::assign_detail::generic_list<int>*>]' 
/boost/boost_1_51_0/boost/assign/list_of.hpp:142: instantiated from 'Container boost::assign_detail::converter<DerivedTAssign, Iterator>::convert_to_container() const [with Container = std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >, DerivedTAssign = boost::assign_detail::generic_list<boost::assign_detail::generic_list<int> >, Iterator = std::_Deque_iterator<boost::assign_detail::generic_list<int>, boost::assign_detail::generic_list<int>&, boost::assign_detail::generic_list<int>*>]' 
/boost/boost_1_51_0/boost/assign/list_of.hpp:436: instantiated from 'boost::assign_detail::generic_list<T>::operator Container() const [with Container = std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >, T = boost::assign_detail::generic_list<int>]' 
main.cc:1: instantiated from here 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/4.4.2/bits/stl_uninitialized.h:74: error: call of overloaded 'vector(boost::assign_detail::generic_list<int>&)' is ambiguous 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/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>] 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/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>] 
gcc/4.4.2/lib/gcc/x86_64-unknown-linux-gnu/4.4.2/../../../../include/c++/4.4.2/bits/stl_vector.h:215: note:     std::vector<_Tp, _Alloc>::vector(const _Alloc&) [with _Tp = int, _Alloc = std::allocator<int>] 

这里是我的代码：

std::vector< std::vector<int> > v = boost::assign::list_of 
            (boost::assign::list_of(1)(2)) 
            (boost::assign::list_of(3)) 
            (boost::assign::list_of(5)(6)(7)(8)); 

Answer 1

#include <boost/range/algorithm.hpp> 
#include <boost/foreach.hpp> 
#include <boost/assign.hpp> 
#include <iterator> 
#include <iostream> 
#include <ostream> 
#include <vector> 
int main() 
{ 
    using namespace boost; 
    using namespace assign; 
    using namespace std; 

    vector< vector<int> > v = list_of 
     (list_of(1)(2)) 
     (list_of(3)) 
     (list_of(5)(6)(7)(8)); 

    BOOST_FOREACH(const vector<int> &x, v) 
    { 
     copy(x,ostream_iterator<int>(cout," ")); 
     cout << endl; 
    } 
} 

输出是：

1 2 
3 
5 6 7 8 

---

I get the following compiler error for gcc 4.4.2

Follwing代码工作在GCC 4.4.6：

vector< vector<int> > v; 
v += list_of(1)(2), 
    list_of(3), 
    list_of(5)(6)(7)(8);