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Section: 24.5 [unord], 99 [tr.hash] Status: CD1 Submitter: Joaquín M López Muñoz Opened: 2007-06-14 Last modified: 2016-01-28
Priority: Not Prioritized
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Discussion:
The last version of TR1 does not include the following member functions for unordered containers:
const_local_iterator cbegin(size_type n) const; const_local_iterator cend(size_type n) const;
which looks like an oversight to me. I've checked th TR1 issues lists and the latest working draft of the C++0x std (N2284) and haven't found any mention to these menfuns or to their absence.
Is this really an oversight, or am I missing something?
Proposed resolution:
Add the following two rows to table 93 (unordered associative container requirements) in section 24.2.8 [unord.req]:
Unordered associative container requirements (in addition to container) expression return type assertion/note pre/post-condition complexity b.cbegin(n) const_local_iterator n shall be in the range [0, bucket_count()). Note: [b.cbegin(n), b.cend(n)) is a valid range containing all of the elements in the nth bucket. Constant b.cend(n) const_local_iterator n shall be in the range [0, bucket_count()). Constant
Add to the synopsis in 24.5.4 [unord.map]:
const_local_iterator cbegin(size_type n) const; const_local_iterator cend(size_type n) const;
Add to the synopsis in 24.5.5 [unord.multimap]:
const_local_iterator cbegin(size_type n) const; const_local_iterator cend(size_type n) const;
Add to the synopsis in 24.5.6 [unord.set]:
const_local_iterator cbegin(size_type n) const; const_local_iterator cend(size_type n) const;
Add to the synopsis in 24.5.7 [unord.multiset]:
const_local_iterator cbegin(size_type n) const; const_local_iterator cend(size_type n) const;