[indiosmo]

I use this library a lot for scope guards in C++ https://github.com/Neargye/scope_guard, especially for rolling back state on errors, e.g.

In a function that inserts into 4 separate maps, and might fail between each insert, I'll add a scope exit after each insert with the corresponding erase.

Before returning on success, I'll dismiss all the scopes.

I suppose the tradeoff vs RAII in the mutex example is that with the guard you still need to actually call it every time you lock a mutex, so you can still forget it and end up with the unreleased mutex, whereas with RAII that is not possible.

[WalterBright]

The tradeoff with RAII is once you have 3 things that must all succeed or all fail, that is very clumsy to do with RAII, but easy with scope guard.