cairo-closures

name: cairo-closures description: Explain Cairo closures, syntax, capture rules, type inference, and Fn traits; use when a request involves anonymous functions or passing behavior as a parameter in Cairo.

Cairo Closures

Overview

Guide closure syntax and how closures capture environment values in Cairo.

Quick Use

• Read references/closures.md before answering.
• Use concise examples like |x| x * 2 and multi-line closures with {}.
• Mention the current limitation on capturing mutable variables.

Response Checklist

• Use pipe syntax for parameters and infer types when possible.
• Explain capture of outer bindings and when that affects trait bounds.
• Choose FnOnce, FnMut, or Fn based on how the closure uses captured values.

Example Requests

• "How do I write a closure in Cairo?"
• "Why is the closure type inferred as u8?"
• "What is the difference between FnOnce, FnMut, and Fn?"

Cairo by Example

• Closures
• Capturing
• As input parameters
• Input functions
• Higher Order Functions