C++ C++；运算符重载问题：在'<<'；代币

我试图重载插入操作符'代码> int值 <代码> int值，这只是无效的C++语法。运算符重载允许您添加新语义，但不能添加新语法。

int value;
value << data;

int value << data;

#include <iostream>

/**
  * Simple class to use with the templates.
  */
class Data
  {
public:
    Data ()
      {
        m_value = 0;
      }
    Data (int val)
      {
        m_value = val;
      }
    ~Data ()
      {
      }
    int value ()
      {
        return (m_value);
      }
    int value (int val)
      {
        m_value = val;
        return (value ());
      }
private:
    int m_value;
  };

/**
  * Assign data from RHS to LHS.
  */
template <class T>
void operator<< (T &data, Data &node)
  {
    data = node.value ();
  }

/**
  * Simple test program.
  */
int main (int argc, char *argv[])
  {
    // initialize the data
    Data data (123);
    std::cout << data.value () << std::endl;

    // extract the data and assign to integer AFTER initialization
    int value;
    value << data;
    std::cout << value << std::endl;

    // extract the data and assign to integer DURING initialization
    // *** problem is here ***
    int other << data; // <-- this fails to compile with...
    // expected initializer before '<<' token
    std::cout << other << std::endl;

    return (0);
  }