Can I turn off recursive unused function warnings?

[tczajka]

@khimru

Now, if we would assume that you meant “compiler have all the information needed to solve this NP-hard problem and because our tools are not slow enough and rust-analyzer doesn't use enough RAM we can add such ability”… then you are correct: it's possible. I'm not sure it's feasible though: when message includes dozen functions it's not too long and when hundreds functions are involved I would rather see large list than wait for a couple of hours till compiler will solve the problem and present me with five or ten “perfect” options.

This has nothing to do with the Vertex Cover problem. This is the Strongly Connected Components problem. It has a linear-time solution.

In the (unusual) case of a group of functions that call each other (a strongly connected component bigger than one) but aren't called by anything else, the warning could just report that, listing all the functions in the group.