Architecture Development Notes
Mar 13, 2025 · Fundamentals
Mastering Rust Closures: When to Use Fn, FnMut, and FnOnce
This article explains Rust's closure system, detailing how the three traits Fn, FnMut, and FnOnce map to different capture modes and ownership semantics, and provides practical examples, common pitfalls, and performance tips for writing safe and efficient Rust code.
ClosuresFnFnMut
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