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Comment by knorker | Hacker News Reader

This is a "hello world" of C++11 threading.

I'm not sure what this is doing on HN.

You definitely have a different interpretation of "Hello World" than most people. There is some pretty sophisticated syntax happening in this short example. If I were to do a real hello world, it would be more high-level and a lot shorter, but also not as useful as this example.

I wonder how many people would know about

    using return_type = typename std::result_of<F(Args...)>::type

though.

It's a neat trick I hadn't seen before, but it doesn't seem particularly advanced. There are all kinds of things in the STL that I don't remember or care about until I actually need them.

Maybe in this context they shouldn't, either.

    using return_type = decltype(f(args...));

seems easier to read and "more C++11".

Also the "> >" is a pre-C++11 pattern.

Earlier versions did use decltype but that causes issues with pointers to member functions. See: https://github.com/progschj/ThreadPool/commit/ac2a77d5cc0436...

result_of has now been deprecated in newer C++ versions but since this advertises itself as C++11 thread pool I intend to leave it as is.

Not everyone on HN knows about C++11 threading. A "hello world" is of interest to some people.

It also has 2.9k stars on GitHub for some reason.

Fundamentally concepts are enjoyed by most everyone, including those who are learning about them the first time, especially when they're explained clearly.

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