match_results behavior for certain operations Section: 28.6.9.5 [re.results.acc] Status: Resolved Submitter: BSI Opened: 2010-08-25 Last modified: 2016-01-28
Priority: Not Prioritized
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Discussion:
Addresses GB-126
It's unclear how match_results should behave if it has been default-constructed. The sub_match objects returned by operator[], prefix and suffix cannot point to the end of the sequence that was searched if no search was done. The iterators held by unmatched sub_match objects might be singular.
[ Resolution proposed by ballot comment: ]
Add to match_results::operator[], match_results::prefix and match_results::suffix:
Requires: !empty()
[ 2010-10-24 Daniel adds: ]
Accepting n3158 would solve this issue.
Proposed resolution:
Addressed by paper n3158.