this post was submitted on 27 Sep 2023
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Rust
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Some applications have a hard zero-alloc requirement.
But that's not the case here, seeing as they have
in the code of with_nix_path. And I think they still could've made it return the value instead of calling the passed in function, by using something like
But I don't know what performance implications that would have, and whether the difference would matter at all. Would there be an unnecessary copy? Would the compiler optimize it out? etc.
Also, from a maintainability standpoint, the context through which the library authors need to manually ensure all the unsafe code is used correctly would be slightly larger.
As a user of a library, I would still prefer all that over the nesting.