Rust Error Handling: thiserror, anyhow, and When to Use Each

Tue, 06 Feb 2024 00:00:00 +0000

In this blog post, we’ll explore strategies for streamlining error handling in Rust using two popular libraries: thiserror and anyhow. We’ll discuss their features, use cases, and provide insights on when to choose each library.

TL;DR

thiserror simplifies the implementation of custom error type, removing boilerplates
anyhow consolidates errors that implement std::error::Error
While thiserror provides detailed error information for specific reactions, anyhow hides internal details

Return Different Error Types from Function

Let’s start by creating a function decode() for illustration. The function has 3 steps:

Error-Handling on Momori Nakano

Rust Error Handling: thiserror, anyhow, and When to Use Each

TL;DR

Return Different Error Types from Function