[stargrazer]

Can you point to better alternate ways or idioms?

[MauranKilom]

It's possible to write something like `std::unique_function` (which uniquely owns the stored callable and can be moved but not copied). That's often preferable for storing functors.

Example: https://github.com/facebook/folly/blob/main/folly/docs/Funct...

[MontagFTB]

stlab has a task type that works around a couple of these issues: https://stlab.cc/libraries/concurrency/task/task/

[jjtheblunt]

(joke) : Common Lisp