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### 1165. Unneeded `promise` move constructor

Section: 32.9.6 [futures.promise] Status: Resolved Submitter: LWG Opened: 2009-06-28 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

Addresses UK 343

Description

The move constructor of a `std::promise` object does not need to allocate any memory, so the move-construct-with-allocator overload of the constructor is superfluous.

Suggestion

Remove the constructor with the signature `template <class Allocator> promise(allocator_arg_t, const Allocator& a, promise& rhs);`

Notes

Create an issue. Detlef will look into it. Will solicit feedback from Pablo. Note that "rhs" argument should also be an rvalue reference in any case.

[ 2009-07 Frankfurt ]

> Pending a paper from Anthony Williams / Detlef Vollmann.

[ 2009-10 Santa Cruz: ]

> NAD Editorial Resolved. Adressed by N2997.

Proposed resolution: