c++ - Boost Multiarray of std::vector -


i'm new boost (and stackoverflow) , want use multiarray of vectors. have done way:

typedef boost::multi_array<std::vector<vector3_t>, 2> array_type; array_type* mimage; int mresolution = 1000; mimage = new array_type (boost::extents[mresolution][mresolution]); //works   mimage[0][0].origin()->push_back(vector3_t()); //error: abort() mimage[1][1].origin()->push_back(vector3_t()); //error: abort() mimage[500][440].origin()->push_back(vector3_t());

on internet can find examples of multiarray use int,doule , on. possible use std::vector in mutliarray ? know use 3d multiarray, prefer vectors elemet.

boost.multiarray supports std::vector elements. in general, boost.multiarray perform concept checking @ compile-time. thus, if code compiles complete type, should supported.

with mimage[0][0].origin():

  • mimage[0][0] returns reference std::vector<vector3_t>.
  • origin() not member function on std::vector<vector3_t>, resulting in error.

origin() member function of multi-array, returns address of first element's storage. in case array has not been reindexed positive index, equivalent of 0 indexes (i.e. mimage.origin() == &mimage[0][0]).

here brief , complete example multi-array of vector of vector of ints.

#include <iostream> #include <vector>  #include <boost/foreach.hpp> #include <boost/range/counting_range.hpp> #include <boost/multi_array.hpp>  int main() {   typedef std::vector<int> vector3_type;   typedef boost::multi_array<std::vector<vector3_type>, 2> array_type;   array_type array(boost::extents[5][5]);    // insert vector multi-array.   array[0][0].push_back(vector3_type());    // insert range of [100,105) first vector @ [0][0]    boost_foreach(const int& i, boost::counting_range(100, 105))     array[0][0].front().push_back(i);    // print integers @ [0][0][0]   boost_foreach(const int& i, array[0][0][0])     std::cout << << std::endl; }

and running produces following expected output:

100 101 102 103 104

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