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This article mainly explains "what to do if you can't choose an appropriate resource handle in C++". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn what to do if you can't choose the appropriate resource handle in C++.

E.19: if the appropriate resource handle cannot be selected, use final_action to represent the cleanup process

Reason (reason)

Compared with try/catch, finally is more concise and less error-prone.

Example (sample)

Void f (int n)

{

Void* p = malloc (n)

Auto _ = finally ([p] {free (p);})

/ /...

}

Note (Note)

Finally is not as messy as try/catch, but it is still a special solution to specific problems. It is better to manage objects with appropriate resources. Think of finally as a last resort.

Note (Note)

Use finally as a systematic and rational way to replace goto exit in existing code. This technique can be used to deal with the problem that resources are not systematically managed.

Enforcement (implementation recommendations)

Heuristic: goto exit detected

About finally

Finally is a support function provided by gsl that can generate a cleanup action for the user to release resources.

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