C++ list_type::begin方法代码示例

 void event_callback(const std::string type, const std::string data, const std::string extra)
 {
   event_record r;
   list_type::iterator record = list_.insert(list_.begin(), r);
   record->type = type;
   record->data = data;
   record->extra = extra;
 }

   static int index(list_type const & x, value_type const & v)
   {
      int i = 0;
      for(typename list_type::const_iterator it=x.begin(); it!=x.end(); ++it,++i)
      {
         if( *it == v ) return i;
      }

      PyErr_SetString(PyExc_ValueError, "Value not in the list");
      throw boost::python::error_already_set();
   }

list_type complement(const list_type& list, size_t max)
{
    list_type out;
    list_type::const_iterator li = list.begin();
    for (size_t i = 0; i < max; ++i)
    {
        if (li != list.end() && *li == i)
            ++li;
        else
            out.push_back(i);
    }
    return out;
}

 bool pop_type(const std::string& type)
 {
   for(list_type::iterator it = list_.begin();
       it != list_.end();
       it++)
   {
     if(it->type == type)
     {
       list_.erase(it);
       return true;
     }
   }
   return false;
 }

 int count_type(const std::string& type)
 {
   int count = 0;
   for(list_type::iterator it = list_.begin();
       it != list_.end();
       it++)
   {
     if(it->type == type)
     {
       count++;
     }
   }
   return count;
 }

static void lb_create_cut(const par::communicator& comm, unsigned int num_cut,
                          unsigned int dimen, const list_type& pl, LBData& lbd)
{
#ifndef NDEBUG
        if (num_cut > pl.size()-1)
                throw std::runtime_error("Cannot create more cuts than points");
#endif
        const unsigned int my_rank = comm.rank();
        // const unsigned int num_proc = comm.size();

        std::vector<real> cut(num_cut);

        const unsigned int num_point = pl.size();
        unsigned int ipoint = 0;
        list_type::const_iterator pit = pl.begin();
        for (unsigned int icut=0; icut<num_cut; icut++) {
                const unsigned int target = std::round((num_point - ipoint) / (num_cut + 1 - icut));
                // std::cout << "icut=" << icut << ", target = " << target << std::endl;
                const unsigned int visited = ipoint;
                while ((ipoint - visited) < target) {
                        ++pit;
                        ipoint++;
                }
                const point_type& p = *pit;
                cut[icut] = p[dimen];
        }

        // allgather number of cuts on each proc
        lbd.recvcounts[my_rank] = cut.size();
        comm.allgather(lbd.recvcounts.data() + my_rank, 1, lbd.recvcounts.data(), 1);

        const unsigned int glob_num_cut =
                std::accumulate(lbd.recvcounts.begin(), lbd.recvcounts.end(), 0);

        // Resize cut (destroying existing cuts)
        lbd.cut.resize(glob_num_cut);

        lbd.rdispls[0] = 0;
        for (unsigned int i=1; i<lbd.rdispls.size(); i++)
                lbd.rdispls[i] = lbd.rdispls[i-1] + lbd.recvcounts[i-1];

        // allgatherv into lbd.pointcut
        comm.allgatherv(cut.data(), cut.size(), lbd.cut.data(),
                        lbd.recvcounts.data(), lbd.rdispls.data());

        // Sort the cuts
        std::sort(lbd.cut.begin(), lbd.cut.end());
}

   static void set(list_type & x, int i, value_type const & v)
   {
      if( i < 0 ) i += x.size();

      if( i >= 0 && i < (int)x.size() )
      {
         iter_type it = x.begin();
         for(int pos = 0; pos < i; ++pos) ++it;
         *it = v;
      }
      else
      {
         PyErr_SetString(PyExc_IndexError, "Index out of range");
         boost::python::throw_error_already_set();
      }
   }

list_type inverse(const list_type& src)
{
	typedef typename list_type::range_type range_type;
	typedef typename list_type::payload_type payload_type;
	typedef typename list_type::range_size_type range_size_type;
	typedef typename list_type::const_iterator const_iterator;
	list_type result( src.limit() );
	range_size_type last = 0;
	for ( const_iterator i = src.begin(); i != src.end(); ++i )
	{
		result.insert( range_type( last, i->begin() ) );
		last = i->end();
	}
	result.insert( range_type( last, src.limit() ) );
	return result;
}

    //! Calculate rank of a subset A
    unsigned int rank(const list_type& list) const
    {
        list_type out(list.size());

        unsigned int max = 0;

        for (auto b : m_bases)
        {
            list_type::iterator end =
                std::set_intersection(list.begin(), list.end(),
                                      b.begin(), b.end(),
                                      out.begin());

            max = std::max<unsigned int>(max, end - out.begin());
        }

        return max;
    }

    //! test if a set of items contains a circuit
    bool   contains_circuit(const list_type& list) const
    {
        list_type out(list.size());

        for (auto c : m_circuits)
        {
            list_type::iterator end =
                std::set_intersection(list.begin(), list.end(),
                                      c.begin(), c.end(),
                                      out.begin());

            if (end == out.begin() + c.size())
            {
                //std::cout << "contains " << c << std::endl;
                return true;
            }
        }

        return false;
    }

static void rcb1d_recurse(const par::communicator& comm, unsigned int dimen,
                          list_type& pl, LBData& lbd)
{
        const unsigned int my_rank = comm.rank();
        const unsigned int num_proc = comm.size();

        // First: sort list
        sort_point2d_list(dimen, pl);

        if (num_proc == 1) return;
        lbd.change_comm(comm, pl.size());

        const list_type::size_type orig_num_point = lbd.size[my_rank];
        const unsigned int dim = point_type::dim;

        const list_type::size_type glob_num_point =
                std::accumulate(lbd.size.begin(), lbd.size.end(), 0);

        lbd.cut.resize(num_proc);
        lbd.bin.resize(num_proc);

        const real ratio = static_cast<real>((num_proc+1) / 2) / num_proc;
        list_type::size_type this_offset = ratio * orig_num_point;
        const unsigned int rank_midpt = ratio * num_proc;
        {
                real cut = 0;
                int use = 0;
                if (orig_num_point > 0) {
                        const point_type& p = *std::next(pl.begin(), this_offset);
                        cut = p[dimen];
                        use = 1;
                }
                comm.allgather(&cut, 1, lbd.cut.data(), 1);
                comm.allgather(&use, 1, lbd.bin.data(), 1);
        }

        // std::cout << "this_offset = " << this_offset << std::endl;
        // std::cout << "ratio = " << ratio << std::endl;
        // std::cout << "cuts: ";
        // for (auto& p : lbd.cut) std::cout << p << " ";
        // std::cout << std::endl;
        // std::cout << "use: ";
        // for (auto& p : lbd.bin) std::cout << p << " ";
        // std::cout << std::endl;

        real midpt = 0.;
        // std::cout << "my_rank = " << my_rank << std::endl;
        // std::cout << "num_proc = " << num_proc << std::endl;
        for (unsigned int i=0; i<num_proc; i++)
                if (lbd.bin[i] != 0) // include this point
                        midpt += lbd.cut[i] *
                                static_cast<real>(lbd.size[i]) /
                                static_cast<real>(glob_num_point);

        list_type other;
        list_type::iterator pit = std::find_if(pl.begin(), pl.end(),
                                               [midpt,dimen](const point_type& p)
                                               { return p[dimen] >= midpt; });
        list_type::size_type offset;
        if (my_rank < rank_midpt) {
                other.splice(other.begin(), pl, pit, pl.end());
                offset = pl.size();
        }
        else {
                other.splice(other.begin(), pl, pl.begin(), pit);
                offset = other.size();
        }
        // std::cout << "pl: ";
        // for (auto& p : pl) std::cout << p << " ";
        // std::cout << std::endl;
        // std::cout << "other: ";
        // for (auto& p : other) std::cout << p << " ";
        // std::cout << std::endl;
        // std::cout << "offset = " << offset << std::endl;
        lbd.send.resize(other.size() * dim);
        {
                list_type::iterator it=other.begin();
                list_type::size_type i = 0;
                while (it != other.end()) {
                        const point_type& p = *it;
                        for (unsigned int d=0; d<dim; d++, i++)
                                lbd.send[i] = p[d];
                        other.erase(it++);
                }
        }
        // std::cout << "send: ";
        // for (auto& p : lbd.send) std::cout << p << " ";
        // std::cout << std::endl;

        // std::cout << "midpt = " << midpt << std::endl;
        // std::cout << "rank_midpt = " << rank_midpt << std::endl;
        // std::cout << "this_offset = " << this_offset << std::endl;

        // Pack up points
        lbd.sendcounts.resize(num_proc);

        // Zero out
        std::fill(lbd.sendcounts.begin(), lbd.sendcounts.end(), 0);

        if (my_rank < rank_midpt) {
//.........这里部分代码省略.........

 static bool in(list_type const & x, value_type const & v)
 {
    return std::find(x.begin(), x.end(), v) != x.end();
 }

bool contains(const list_type& list, size_t item)
{
    return std::find(list.begin(), list.end(), item) != list.end();
}