Benjamin Kramer fcf463e1c1 [ADT] Make moving Optional not reset the Optional it moves from. ...

This brings it in line with std::optional. My recent changes to
make Optional of trivial types trivially copyable introduced
diverging behavior depending on the type, which is bad. Now all
types have the same moving behavior.

llvm-svn: 323445

2018-01-25 17:24:22 +00:00

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