std::result_of and std::result_of_t are deprecated in C++17. They are superseded by std::invoke_result and std::invoke_result_t

[KevinWang-kk]

(1) (since C++14)

template< class T >
using result_of_t = typename result_of::type; //(deprecated in C++17)

(2) (since C++17)
template< class F, class... ArgTypes>
using invoke_result_t = typename invoke_result<F, ArgTypes...>::type;

[Light7734]

ThreadPool fails to compile on clang16 w/ C++20 because of the use of std::result_of

Also conan center only has the 20140926 version.

[wilx]

This thread pool is a good example but it has limitations. I would suggest using improved ThreadPool that was based on this example implementation that we us in log4cplus: log4cplus/ThreadPool