[jira] [Created] (ARROW-10978) [Rust] Document use of unsafe in utils

["Andy Grove (Jira)" <ji...@apache.org>]

Andy Grove created ARROW-10978:
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             Summary: [Rust] Document use of unsafe in utils
                 Key: ARROW-10978
                 URL: https://issues.apache.org/jira/browse/ARROW-10978
             Project: Apache Arrow
          Issue Type: Sub-task
          Components: Rust
            Reporter: Andy Grove
             Fix For: 3.0.0


There are ~18 uses of unsafe in src/utils and we should document them according to the guidelines in the Arrow crate README

 
{code:java}
// JUSTIFICATION
//  Benefit
//      Describe the benefit of using unsafe. E.g.
//      "30% performance degradation if the safe counterpart is used, see bench X."
//  Soundness
//      Describe why the code remains sound (according to the definition of rust's unsafe code guidelines). E.g.
//      "We bounded check these values at initialization and the array is immutable."
let ... = unsafe { ... }; {code}



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