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Refactor unsafe implementation of std::mem::replace #117189

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Refactor unsafe implementation of std::mem::replace #117189

wants to merge 2 commits into from

Commits on Oct 25, 2023

  1. Refactor unsafe implementation of std::mem::replace 

    The function now defers to mem::swap, which both
eliminates the use of `unsafe` in the function, and
also allows it (and mem::take) to benefit from
any performance enhancements to mem::swap, such as
the current use of ptr::swap_nonoverlapping for large
types.
    @chfogelman
    chfogelman committed Oct 25, 2023
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  2. Update aliasing_mut4 miri test

    @chfogelman
    chfogelman committed Oct 25, 2023
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