Some general clean-up of std::vec::raw #10984
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raw}::copy_memory. Slices carry their length with them, so we can just use that information.
These are less useful versions of the comparison operators and TotalOrd trait.
This can easily be written as `(*v.unsafe_ref(i)).clone()`, or just `*v.unsafe_ref(i)` for primitive types like `i32` (the common case).
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See: * rust-lang/rust#10984 - Some general clean-up of std::vec::raw * rust-lang/rust@164f7a2 - std::vec: convert to(_mut)_ptr to as_... methods on &[] and &mut [].
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