Is it possible to export templates from dll?

Question

C++ / C#

I need to implement the Vector2 class for different types, but I'm too lazy to write the implementation of methods for each manually. It would be reasonable to use templates, but I need to export this class.

Answer 1

You can, if you instantiate templates explicitly for predefined types, for example:

template <typename T> struct Vector { ... };
template <typename T> void foo(Vector<T> &); // definition in cpp

template struct Vector<Point2d>;
template struct Vector<Point3d>;

template void foo<Point2d>(Vector<Point2d> &);
template void foo<Point3d>(Vector<Point3d> &);

Structures Vector<Point2d>and Vector<Point3d>will be exported.

Answer 2

You can't do that.