Re:Rust is for Professionals
by xena on Tuesday April 13, 2021 @12:08PM
(#26794417)
Doesn't the compiler optimize out clones when it can?
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There's a Cargo tool called "clippy" which will tell you if it finds unnecessary clones.
Probably not; detecting unnecessary clones is expensive for non-trivial cases. If a human can't prove that the clone isn't necessary (by writing the code in such a manner that the borrow checker accepts), I doubt the compiler could.