this post was submitted on 08 Feb 2024
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Announcing Rust 1.76.0 (blog.rust-lang.org)
submitted 7 months ago by snaggen@programming.dev to c/rust@programming.dev
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[–] owsei@programming.dev 1 points 7 months ago* (last edited 7 months ago)

it's just a way to use map with a reference instead of the value, by what I understood.

could be usefull for logging values in a Result so you can see it. However I think you can already do that by just mapping and returning the variable.