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Section: 20.11.3 [util.smartptr.shared] Status: New Submitter: Agustín K-ballo Bergé Opened: 2017-09-13 Last modified: 2017-11-09
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shared_ptr has been designed to support use cases where it owns a pointer to function, and whose deleter does something with it. This can be used, for example, to keep a dynamic library loaded for as long as their exported functions are referenced.Implementations have overlooked that the T in shared_ptr<T> can be a function type. It isn't immediately obvious from the standard, and it's not possible to tell from the wording that this is intentional.
[2017-11 Albuquerque Wednesday night issues processing]
Priority set to 3
This wording is relative to N4687.
Edit 20.11.3 [util.smartptr.shared] as indicated:
[…]-2- Specializations of shared_ptr shall be CopyConstructible, CopyAssignable, and LessThanComparable, allowing their use in standard containers. Specializations of shared_ptr shall be contextually convertible to bool, allowing their use in boolean expressions and declarations in conditions.
The template parameter T of shared_ptr may be an incomplete type.[…]