纯抽象类有功能与stl是dll接口？

Question

我是编写 dll 库的初学者。我读过 ABI 兼容性。但我不确定纯抽象类是否可以具有 stl 返回类型或 stl 参数。

in dll

foo.h
class IFoo {
  void Hello(const std::string&); // this declaration could be possible?
}

void export Inject(IFoo& foo);

foo.cc
IFoo* g_foo;

void Inject(IFoo& foo) {
  g_foo = &foo;
}

*g_foo // It could be problem?

in application
class Foo : public IFoo {
 // implemented
}

Foo foo;
Inject(foo);