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flat_meow range insertion behavior is unclear if in-place merge cannot allocate additional memorySection: 23.6.8.7 [flat.map.modifiers], 23.6.11.5 [flat.set.modifiers], 23.6.12.5 [flat.multiset.modifiers] Status: New Submitter: Tim Song Opened: 2025-09-09 Last modified: 2025-09-19
Priority: Not Prioritized
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Discussion:
The range insertion operations of flat_map/multimap/set/multiset have this Remarks: element:
Since this operation performs an in-place merge, it may allocate memory.
It is not clear what happens if that allocation fails. If the inplace_merge algorithm is used,
it will fall back to a less efficient 𝒪(N log N) algorithm, but this is not reflected
in the Complexity: element. Alternatively, if the allocation failure is reported by an exception,
that should be called out in the spec.
Proposed resolution: