This technique will work in some cases. I create a fake_anything type that can fake almost anything, and try to invoke your lambda with some number of instances of that. #include <iostream> struct fake_anything { fake_anything(fake_anything const&); fake_anything(); fake_anything&operator=(fake_anything const&); template<class T>operator T&() const; template<class T>operator T&&() const; template<class T>operator T const&() const; template<class T>operator … Read more
I think this is a subtle implementation of a Monad-like thing, specifically something in the same spirit of the continuation monad. Monads are a functional programming construction used to simulate state between different steps of a computation (Remember that a functional language is stateless). What a monad does is to chain different functions, creating a … Read more
Perfect capture in C++20 template <typename … Args> auto f(Args&& … args){ return [… args = std::forward<Args>(args)]{ // use args }; } C++17 and C++14 workaround In C++17 we can use a workaround with tuples: template <typename … Args> auto f(Args&& … args){ return [args = std::make_tuple(std::forward<Args>(args) …)]()mutable{ return std::apply([](auto&& … args){ // use args … Read more