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825. Missing rvalues reference stream insert/extract operators?

Section: 19.5.4.1 [syserr.errcode.overview], 20.3.2.2.12 [util.smartptr.shared.io], 99 [facets.examples], 22.9.4 [bitset.operators], 28.4.6 [complex.ops], 31.6 [stream.buffers], 32.8 [re.submatch] Status: Resolved Submitter: Alisdair Meredith Opened: 2008-04-10 Last modified: 2017-03-21

Priority: Not Prioritized

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Discussion:

Addresses UK 220

Should the following use rvalues references to stream in insert/extract operators?

• 19.5.4.1 [syserr.errcode.overview]
• 20.3.2.2.12 [util.smartptr.shared.io]
• 99 [facets.examples]
• 22.9.4 [bitset.operators]
• 28.4.6 [complex.ops]
• Doubled signatures in 31.6 [stream.buffers] for character inserters (ref 31.7.6.3.4 [ostream.inserters.character]) + definition 31.7.6.3.4 [ostream.inserters.character]
• 32.8 [re.submatch]

[ Sophia Antipolis ]

Agree with the idea in the issue, Alisdair to provide wording.

[ Daniel adds 2009-02-14: ]

The proposal given in the paper N2831 apparently resolves this issue.

[ Batavia (2009-05): ]

The cited paper is an earlier version of N2844, which changed the rvalue reference binding rules. That paper includes generic templates operator<< and operator>> that adapt rvalue streams.

We therefore agree with Daniel's observation. Move to NAD EditorialResolved.

Proposed resolution: