[set.symmetric.difference] Returns refers to an undefined quantity K
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Assessment
- Difficulty
- 1/5
- Estimated time
- Under an hour
- Newbie friendliness
- 85/100
- Issue type
- Bug
- Clarity
- Clearly specified
- Activity status
- Active
- Tech stack
- cpp, tex
- Domain
- documentation
Research direction
The issue identifies the Returns paragraph in [set.symmetric.difference] and compares it with [set.union]. Read those subclauses in the draft source, confirm the surrounding definitions and matching wording, then make the suggested wording consistent. Done means the condition says “if N is equal to M” and the change is covered by the project’s usual document checks.
Written by the indexing model from the issue text.
Description
In [set.symmetric.difference] paragraph "Returns" (main 47974a2f, same as N5050), the second bullet reads: "{last1, last2, result + N} for the overloads in namespace ranges, if N is equal to M + K."
The paragraph defines M, N, A and B, but K is not defined in it or in the surrounding subclause. The analogous Returns of ranges::set_union ([set.union]) has the same three bullets with the condition "if N is equal to M", so "+ K" looks like a leftover from editing. I think this is editorial because the intent is clear from that parallel; if the editors disagree it should go to LWG.
Suggested fix: change "if N is equal to M + K" to "if N is equal to M".
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- 1d 11h
- Merged PRs (30d)
- 8
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