labath added a comment. While we wait for the verdict on the template stuff, it occurred to me that you don't need the PerformCleanup bool member as std::function has an "empty" state. So the destructor can just do `if(Cleanup) Cleanup()` and the disable function can reset the cleanup object. (If you want to make sure the object is always created with a non-empty std::function initially, you can add an assert in the constructor).
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