我可以删除boost::multi_array的单个维度而不复制其内容吗

下面是我的代码，用于将boost:：multi_array从形状[3 4 2]重塑为[12 2]。由于维度在boost:：multi_array中是固定的，所以我首先将三维数组重塑为[12 2 1]形状，然后将前两个维度复制到一个新的数组中。

有没有一种更简单的方法不进行任何复制（我更喜欢按照numpy.reform的精神查看原始数据）。

使用g++ -g test.cc && ./a.out 运行

#include "boost/multi_array.hpp"                                                                                                                                                                                                                                                                                           
#include <cassert>                                                                                                                                                                                                                                                                                                         
#include <iostream>                                                                                                                                                                                                                                                                                                        

int                                                                                                                                                                                                                                                                                                                        
main () {                                                                                                                                                                                                                                                                                                                  
  // Create a 3D array that is 3 x 4 x 2                                                                                                                                                                                                                                                                                   
  typedef boost::multi_array<double, 3> array_type;                                                                                                                                                                                                                                                                        
  typedef array_type::index index;                                                                                                                                                                                                                                                                                         
  array_type A(boost::extents[3][4][2]);                                                                                                                                                                                                                                                                                   
  // indexer can be const a boost::array                                                                                                                                                                                                                                                                                   
  boost::array<array_type::index,3> idx = {{0,0,0}};                                                                                                                                                                                                                                                                       
  // Assign values to the elements                                                                                                                                                                                                                                                                                         
  int values = 0;                                                                                                                                                                                                                                                                                                          
  for(index i = 0; i != 3; ++i)                                                                                                                                                                                                                                                                                            
    for(index j = 0; j != 4; ++j)                                                                                                                                                                                                                                                                                          
      for(index k = 0; k != 2; ++k)                                                                                                                                                                                                                                                                                        
        A[i][j][k] = values++;                                                                                                                                                                                                                                                                                             
  std::cout << "array elements: " << A.num_elements() << std::endl;                                                                                                                                                                                                                                                        
  std::cout << "array ndim: " << A.num_dimensions() << std::endl;                                                                                                                                                                                                                                                          
  std::cout << "array size: " << A.size() << std::endl; // equivalent to a.shape()[0];                                                                                                                                                                                                                                     
  std::cout << "array shape: " << A.shape()[0] <<" " << A.shape()[1] <<" " << A.shape()[2] << std::endl;                                                                                                                                                                                                                   
  int verify = 0;                                                                                                                                                                                                                                                                                                          
  for(index i = 0; i != 3; ++i)                                                                                                                                                                                                                                                                                            
    for(index j = 0; j != 4; ++j)                                                                                                                                                                                                                                                                                          
      for(index k = 0; k != 2; ++k) {                                                                                                                                                                                                                                                                                      
        std::cout << "A[" <<i <<"]["<<j<<"]["<<k<<"] = " << A[i][j][k] << std::endl;                                                                                                                                                                                                                                       
        assert(A[i][j][k] == verify++);                                                                                                                                                                                                                                                                                    
      }                                                                                                                                                                                                                                                                                                                    
  boost::array<array_type::index,3> dims2 = {{12, 2, 1}};                                                                                                                                                                                                                                                                  
  A.reshape(dims2);                                                                                                                                                                                                                                                                                                        
  std::cout << "array shape: " << A.shape()[0] <<" " << A.shape()[1] <<" " << A.shape()[2] << std::endl;                                                                                                                                                                                                                   
  for(index i = 0; i != 12; ++i)                                                                                                                                                                                                                                                                                           
    for(index j = 0; j != 2; ++j)                                                                                                                                                                                                                                                                                          
      for(index k = 0; k != 1; ++k) {                                                                                                                                                                                                                                                                                      
        std::cout << "A[" <<i <<"]["<<j<<"]["<<k<<"] = " << A[i][j][k] << std::endl;                                                                                                                                                                                                                                       
      }                                                                                                                                                                                                                                                                                                                    
  typedef boost::multi_array<double, 2> Array2d;                                                                                                                                                                                                                                                                           
  Array2d B(boost::extents[12][2]);                                                                                                                                                                                                                                                                                        
  for(index i = 0; i != 12; ++i)                                                                                                                                                                                                                                                                                           
    for(index j = 0; j != 2; ++j){                                                                                                                                                                                                                                                                                         
      B[i][j] = A[i][j][0];                                                                                                                                                                                                                                                                                                
      std::cout << "B[" <<i <<"]["<<j<<"] = " << B[i][j] << std::endl;                                                                                                                                                                                                                                                     
    }                                                                                                                                                                                                                                                                                                                      
  return 0;                                                                                                                                                                                                                                                                                                                
}