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Section: 18.104.22.168 [fs.rec.dir.itr.members] Status: WP Submitter: Casey Carter Opened: 2018-02-25 Last modified: 2018-06-12
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recursive_directory_iterator::pop is effectively a "supercharged" operator++: it advances the iterator forward as many steps as are necessary to reach the next entry in the parent directory. Just as is the case for operator++, pop must be allowed to invalidate iterator copies to allow efficient implementation. The most efficient fix seems to be borrowing the invalidation wording from 22.2.3 [input.iterators] Table 87's specification for the required ++r expression for input iterators.
[ 2018-03-06 Moved to Tentatively Ready after 5 positive votes on c++std-lib. ]
[2018-06 Rapperswil: Adopted]
This wording is relative to N4727.
Change 22.214.171.124 [fs.rec.dir.itr.members] as indicated:
void pop(); void pop(error_code& ec);
-26- Effects: If depth() == 0, set *this to recursive_directory_iterator(). Otherwise, cease iteration of the directory currently being iterated over, and continue iteration over the parent directory.
-27- Throws: As specified in 27.11.6 [fs.err.report].