thiserror-expert

What problem does it solve?

Provides guidance on creating custom error types with thiserror, including derive macros, error messages, and source error chaining.

Core Features & Use Cases

• Pattern 1: Basic Error Enum: Replace manual Display/Error implementations with #[derive(Error)].
• Pattern 2: Error Messages with Fields: Rich error messages using named or positional fields.
• Pattern 3: Wrapping Source Errors with #[from]: Automatic From implementations for seamless error propagation.
• Additional guidance on error context, chaining, and readability.

Quick Start

Define a simple error enum with #[derive(Error)] and use #[from] wrappers for io::Error.