splice() should take template instead of slist&

[vinipsmaker]

I have something like follows:

class Parent : public slist_base_hook<>
{
    // virtual destructor, etc
};

class Child : public Parent
{};

slist<Parent> storage;
slist<Child> temporaries;

I need to move all elements from temporaries to storage at the end of a function. I've tried to use splice(), but it doesn't work because it expects a slist of the same type as *this.