Browse Teach Curate

Closures and Variable Capture

A closure captures the variables it uses from the enclosing scope, either by reference or by taking ownership, which determines whether the environment must outlive the closure. Capture mode decides whether a closure can escape its creating scope or cross a thread boundary.

Questions this Concept answers

Why does a closure that merely borrows its captures sometimes fail to compile when handed to kernel code?

jeremy Text

Rust Closures: Fn, FnMut, FnOnce, and move Explained

A closure is an unnamed function that can use variables from the code around it. This page shows the three ways it can hold onto those variables - reading them, changing them, or taking them over wit…