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2622. [filesys.ts] [PDTS] directory_iterator underspecified

Section: 13.1 [filesys.ts::directory_iterator.members] Status: TS Submitter: CH-13 Opened: 2014-01-20 Last modified: 2017-07-30

Priority: Not Prioritized

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Discussion:

Addresses: filesys.ts

The behaviour of increment is underspecified: What happens if the implementation detects an endless loop (e.g. caused by links)? What happens with automounting and possible race conditions?

More information on this can be found here.

Suggested action:

Specify the required behaviour in these cases.

[2014-02-13 LWG/SG-3 Issaquah: STL will provide wording for next meeting for the endless loop case. The other cases are covered by existing wording in the front matter.]

[17 Jun 2014 At the request of the LWG, Beman provides wording for a note.]

Proposed resolution:

In 14 Class recursive_directory_iterator [class.rec.dir.itr], add:

[Note: If the directory structure being iterated over contains cycles then the end iterator may be unreachable. --end note]

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