Is there a way to export a friend operator defined in a template class?
matrix.hpp
template<typename T>
class Matrix
{
private:
// Some members...
public:
// Some functions...
Matrix operator+(const T&) const;
friend Matrix operator+(const T&, const Matrix&);
};
matrix.cpp
template<typename T>
Matrix<T> Matrix<T>::operator+(const T& rhs) const
{
// Addition of a matrix with object T...
}
template<typename T>
Matrix<T> operator+(const T& lhs, const Matrix<T>& rhs)
{
return rhs + lhs; // Defined above
}
template __declspec(dllexport) Matrix<int> Matrix<int>::operator+(const int&) const; // This WORKS
template __declspec(dllexport) Matrix<int> operator+(const int& lhs, const Matrix<int>& rhs); // This DOESN'T COMPILE
// Compiler shows error E0801: "operator+" is not a class or function template name in the current scope
So in my executable I can do a Matrix<int> a = matrix + 10; but not Matrix<int> a = 10 + matrix;, bit frustrating...
