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README.md

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 Implementation of *Scope Guards* (`scope_exit`, `scope_success`, `scope_fail`) and `unique_resource` as proposed in [**P0052R5**][2] (former [N3949][1]).
 
 
+There's a *C++14* implementation on the **`cpp14`** Branch.
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 ## Compatibility
 
 This implementation conforms to [P0052][2], except: