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authorMatthias Krüger <matthias.krueger@famsik.de>2021-12-03 06:24:11 +0100
committerGitHub <noreply@github.com>2021-12-03 06:24:11 +0100
commit31003a3089cce2a918a9c8b73a77781d19c5f1d8 (patch)
tree8e2318b63cfa60e6bf19534700afdb09bedd878e /compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp
parentff23ad3179014ba258f2b540fb39dd0f26852b7a (diff)
parent41e21aa1c27522c6b29c5b88e37b1f479f63e38c (diff)
downloadrust-31003a3089cce2a918a9c8b73a77781d19c5f1d8.tar.gz
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Rollup merge of #88906 - Kixunil:box-maybe-uninit-write, r=dtolnay
Implement write() method for Box<MaybeUninit<T>>

This adds method similar to `MaybeUninit::write` main difference being
it returns owned `Box`. This can be used to elide copy from stack
safely, however it's not currently tested that the optimization actually
occurs.

Analogous methods are not provided for `Rc` and `Arc` as those need to
handle the possibility of sharing. Some version of them may be added in
the future.

This was discussed in #63291 which this change extends.
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