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4e5fec2f1e
Auto merge of #134757 - RalfJung:const_swap, r=scottmcm
...
stabilize const_swap
libs-api FCP passed in https://github.com/rust-lang/rust/issues/83163 .
However, I only just realized that this actually involves an intrinsic. The intrinsic could be implemented entirely with existing stable const functionality, but we choose to make it a primitive to be able to detect more UB. So nominating for `@rust-lang/lang` to make sure they are aware; I leave it up to them whether they want to FCP this.
While at it I also renamed the intrinsic to make the "nonoverlapping" constraint more clear.
Fixes #83163
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