P2590R2 Explicit Lifetime Management#6170
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StephanTLavavej wants to merge 1 commit intomicrosoft:mainfrom
Open
P2590R2 Explicit Lifetime Management#6170StephanTLavavej wants to merge 1 commit intomicrosoft:mainfrom
StephanTLavavej wants to merge 1 commit intomicrosoft:mainfrom
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Fixes #2942 by implementing
start_lifetime_asandstart_lifetime_as_arrayfor MSVC. Filed #6169 as a followup issue for Clang and EDG.@JonCavesMSFT's internal MSVC-PR-703299 on 2026-01-31 implemented do-nothing intrinsics because C2 (the MSVC backend) doesn't implement type-based alias analysis and there are currently no plans to do so. However, if we ever implement such optimizations in the 24th century, the intrinsics will be updated accordingly.
I have intentionally avoided marking these functions as
[[nodiscard]]because they can be validly called for their "side effects" and their return value is not critical. (Unlikestd::launder(), where the "magic" happens in the return value only.)