this post was submitted on 26 Aug 2024
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Programming
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What is the borrow checker and why are people so frustrated by it?
Very TL;DR version: a variable has an owner. If you pass it off to another function, you no longer own it and can't use it until/unless it gives the variable back. Rust can be really strict on making sure you aren't trying to use something you don't own at that time. The documentation explains it better than this (and I wrote a longer post but accidentally closed the window and lost it). See also mutability and lifetimes for some pain points people might not be used to.
Thanks for the answer!