菜单
Explain Cairo printing and formatting with print!/println!/format!, Display/Debug traits, and Formatter helpers; use when a request involves output formatting or printing custom types in Cairo.
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
基于 SOC 职业分类
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-printing |
| description | Explain Cairo printing and formatting with print!/println!/format!, Display/Debug traits, and Formatter helpers; use when a request involves output formatting or printing custom types in Cairo. |
Guide printing for standard and custom types, including Display and Debug formatting.
references/printing.md before answering.println! for newline output and format! for ByteArray formatting.Debug for complex types when no Display impl exists.println! and print! use Display ({}) and Debug ({:?}).format! returns a ByteArray and does not consume inputs.Display or derive Debug.write!/writeln! with Formatter for custom formatting.