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Explain Cairo `if let` and `while let` concise control flow; use when a request involves matching a single pattern or looping over Option-like values in Cairo.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Document Cairo language quirks, gotchas, and idiomatic workarounds; use when encountering unexpected compilation errors or behaviors in Cairo that differ from Rust.
Guide implementing custom numeric types in Cairo with invariant enforcement, overflow safety, and standard trait implementations; use when implementing fixed-point, signed integers, or other numeric primitives.
Explain how to write and run Cairo tests, including `#[test]`, assert macros, `#[should_panic]`, `#[ignore]`, and `#[available_gas]`; use when a request involves writing or running unit tests in Cairo.
Explain Cairo Array usage, ArrayTrait methods, array! macro, Span, and array read/write constraints; use when a request involves creating, updating, reading, or passing arrays in Cairo.
Explain Cairo associated items (functions, types, constants, implementations) in traits and impls; use when a request involves associated types, constants, or clarifying trait item placement in Cairo.
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.
| name | cairo-if-let-while-let |
| description | Explain Cairo `if let` and `while let` concise control flow; use when a request involves matching a single pattern or looping over Option-like values in Cairo. |
Use if let and while let for concise pattern matching when only one pattern matters.
references/if-let-while-let.md before answering.match when explaining tradeoffs.if let can include an else branch.if let pattern = expr { ... } for single-variant matches.while let pattern = expr { ... } to loop while a pattern matches.