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### 1164. `promise::swap` should pass by rvalue reference

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

Priority: Not Prioritized

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Discussion:

Addresses UK 341

Description

`promise::swap` accepts its parameter by lvalue reference. This is inconsistent with other types that provide a swap member function, where those swap functions accept an rvalue reference

Suggestion

Change `promise::swap` to take an rvalue reference.

Notes

Create an issue. Detlef will look into it. Probably ready as it.

[ 2009-07 Frankfurt ]

> NAD, by virtue of the changed rvalue rules and swap signatures from Summit.

Proposed resolution: