Section: 220.127.116.11 [meta.trans.other] Status: C++20 Submitter: Tim Song Opened: 2017-06-14 Last modified: 2021-02-25 10:48:01 UTC
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aligned_union's description doesn't, but should, require the types provided to be complete object types.
[2017-07 Toronto Monday issue prioritization]
Priority 0; move to Ready
This wording is relative to N4659.
In 18.104.22.168 [meta.trans.other], edit Table 50 "Other transformations" as indicated:
Table 50 — Other transformations Template Comments […] template <size_t Len, class... Types>
The member typedef type shall be a POD type suitable for use as uninitialized storage for any object whose type is listed in Types; its size shall be at least Len. The static member alignment_value shall be an integral constant of type size_t whose value is the strictest alignment of all types listed in Types.
Requires: At least one type is provided.