运算符重载Boost ublas矢量

Question

Is there a way I can overload the "/" operator for a boost vector in C++?

#include <boost/assign.hpp>
#include <boost/numeric/ublas/vector.hpp>
#include <boost/numeric/ublas/matrix.hpp>
#include <boost/numeric/ublas/operations.hpp>
#include <boost/numeric/ublas/assignment.hpp>

namespace ublas = boost::numeric::ublas;


using namespace boost::assign;

template <typename T, typename U>
ublas::vector<T> operator/(U& var)
{
// do something here
return *this;
}

I am seeing errors like Overloaded 'operator/' must be a binary operator (has 1 parameter)

Answer 1

What you need is this:

#include <boost/assign.hpp>
#include <boost/numeric/ublas/vector.hpp>
#include <boost/numeric/ublas/matrix.hpp>
#include <boost/numeric/ublas/operations.hpp>
#include <boost/numeric/ublas/assignment.hpp>

namespace ublas = boost::numeric::ublas;
using namespace boost::assign;

template <typename T, typename U>
ublas::vector<T> operator/(ublas::vector<T> v, U& var)
{
    // your logic for /
    return v;
}


int main()
{
    ublas::vector<int> v1;
    auto v2 = v1 / 2;
    return 0;
}

Answer 2

您拥有的运算符函数是一个独立函数，不是类的成员，因此它需要它应该处理的对象的两个参数，并且由于它不是类成员，因此也没有this 。