This question already has answers here: Why doesn’t shared_ptr<A> implicit convert to shared_ptr<A const>? (1 answer) C++ template instantiation with shared_ptr to const T [duplicate] (2 answers) Closed 4 days ago. This post was edited and submitted for review 4 days ago. Given a shared_ptr to a non-template class, I regularly pass such a variable […]

This question already has answers here: Why doesn’t shared_ptr<A> implicit convert to shared_ptr<A const>? (1 answer) C++ template instantiation with shared_ptr to const T [duplicate] (2 answers) Closed 4 days ago. This post was edited and submitted for review 4 days ago. Given a shared_ptr to a non-template class, I regularly pass such a variable […]

I have templated class that includes two nested class like below

I have templated class that includes two nested class like below

I have templated class that includes two nested class like below

I have templated class that includes two nested class like below

I have templated class that includes two nested class like below

I have templated class that includes two nested class like below

I’m trying to create a templated function which can take either a Boost ptime, or time_duration – in order to extract the hours and format them as “00:00”.

The wording of the title is a bit iffy but I couldn’t come up with a better one. I hope to explain what I am talking about with these examples: