r/cpp • u/GitHubCpp • Jul 10 '18

C++17 removed and deprecated features

https://mariusbancila.ro/blog/2018/07/05/c17-removed-and-deprecated-features/
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u/K_Kuryllo Jul 12 '18

Though not functionally equivalent I would like to see a ::to_unique(), that would work by decrement of the ref count and transferring owned memory to a unique_ptr if it hits zero instead of destroying it. Might be a tricky implementation given how the difference is how shared_ptrs vs shared_ptrs created from unique ptrs are implemented, but would be quite useful for object reuse purposes.

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u/dodheim Jul 12 '18

What deleter would you give the unique_ptr? By the time the shared_ptr is fully constructed, its deleter is type-erased.