adding to vector of vector<int>, check if element already present

[LMHmedchem]

I am having some issues compiling. I am getting the following error,

 In function `std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > > add_atoms_to_path(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >&, const int&)':
src/src_client_main/internal_hbond_get_path.cpp:255: error: expected `,' or `...' before '&' token
src/src_client_main/internal_hbond_get_path.cpp:256: error: ISO C++ forbids declaration of `IntVect' with no type
src/src_client_main/internal_hbond_get_path.cpp: In member function `bool add_atoms_to_path(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >&, const int&)::PathRemover::operator()(int) const':
src/src_client_main/internal_hbond_get_path.cpp:258: error: `v' undeclared (first use this function)
src/src_client_main/internal_hbond_get_path.cpp:258: error: (Each undeclared identifier is reported only once for each function it appears in.)
src/src_client_main/internal_hbond_get_path.cpp: In function `std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > > add_atoms_to_path(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >&, const int&)':
src/src_client_main/internal_hbond_get_path.cpp:347: error: no matching function for call to `remove_if(__gnu_cxx::__normal_iterator<std::vector<int, std::allocator<int> >*, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > > >, __gnu_cxx::__normal_iterator<std::vector<int, std::allocator<int> >*, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > > >, add_atoms_to_path(std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >&, const int&)::PathRemover)'

With my line numbering,

struct PathRemover                                                     // 252
{                                                                      // 253
   PathRemover(int val) : m_val(val) {}                                // 254
   bool operator()(const IntVect& v) const                             // 255
   {                                                                   // 256
      // if m_val is in this vector, mark it to be removed             // 257
      return std::find(v.begin(), v.end(), m_val) != v.end();          // 258
   }                                                                   // 259
                                                                       // 260
   int m_val;                                                          // 261
};                                                                     // 262


new_set_of_paths.erase(std::remove_if(new_set_of_paths.begin(),        // 345
                                      new_set_of_paths.end(),          // 346
                                      PathRemover(current_neighbor)),  // 347
                                      new_set_of_paths.end());         // 348

It seems the issue is primarily with the v. vector in the struct.

LMHmedchem