We're sunsetting PodQuest on 2025-07-28. Thank you for your support!
Export Podcast Subscriptions
cover of episode SE Radio 643: Tim McNamara on Error Handling in Rust

SE Radio 643: Tim McNamara on Error Handling in Rust

2024/11/27
logo of podcast Software Engineering Radio - the podcast for professional software developers

Software Engineering Radio - the podcast for professional software developers
AI Deep Dive AI Chapters Transcript
People
G
Gavin Henry
T
Tim McNamara
Topics
Tim McNamara 在访谈中详细解释了 Rust 错误处理的四个级别，从忽略错误到使用第三方库进行高级错误处理。他强调了 Rust 静态类型系统和编译时检查在提高程序安全性和性能方面的作用，并对比了 Rust 与其他语言（如 Python 和 C++）在错误处理哲学上的差异。他还讨论了 Result 类型、枚举、问号运算符、unwrap 方法以及处理 FFI 边界错误的技巧。 McNamara 指出，Rust 的错误处理在开始时可能比较困难，因为它与其他语言不同，并且在程序结构方面需要不同的思考方式。他建议采用循序渐进的学习方法，先掌握基本概念，再逐步扩展知识。他详细解释了四个级别的错误处理方法，并推荐了 thiserror、anyhow 和 eyre 三个常用的 Rust 错误处理库，并比较了它们各自的优缺点和适用场景。 在 FFI 部分，McNamara 指出，由于 Rust 和 C 的差异，无法直接将 Rust 的丰富错误处理机制传递到 C 代码中。他建议使用抽象层来简化 Rust 和 C 代码之间的交互，并建议使用全局变量或额外的参数来传递错误信息。 Gavin Henry 作为主持人，引导 Tim McNamara 阐述了 Rust 错误处理的各个方面，并提出了许多问题，例如 Rust 错误处理的演变、与其他语言的对比、最佳实践以及各种错误处理库的使用方法。他还与 McNamara 讨论了在 Rust 与 C 代码交互时如何处理错误，以及如何选择合适的错误处理库。

Deep Dive

Chapters
Tim McNamara explains the concept of errors in Rust, distinguishing between expected and unexpected errors and how they affect program flow.
  • Errors are defined as inputs that a program does not understand or cannot process.
  • Error handling involves splitting the program into main and exceptional paths.
  • Rust's strict type system helps prevent errors by pushing much of the work to compile time.

Shownotes Transcript

Tim McNamara, a well-known Rust educator, author of Rust in Action (Manning), and a recipient of a Rust Foundation Fellowship in 2023, speaks with SE Radio host Gavin Henry) about error handling in Rust. They discuss the errors that Rust prevents, what an error is in Rust, what Tim classes as the "four levels of error handling," and the lifecycle of your journey reaching for them.

McNamara explains why Rust handles errors as it does, how it differs from other languages, and what the developer experience is like in dealing with Rust errors. He advocates best practices for error handling, what Result is, the power of Rust Enums, what the question mark operator is, when to unwrap, what Box really means, how to deal with errors across the FFI boundary, and the various Rust error-handling crates that you can use to give you more control.

Brought to you by IEEE Computer Society) and IEEE Software magazine).