rust-error-handling
Rust-specific error handling patterns, building on the base error handling skill. Demonstrates the 'extends' composition feature.
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- Dicklesworthstone/meta_skill
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- 2026年1月16日 15:56
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- rust-error-handling
- name
- Rust Error Handling
- description
- Rust-specific error handling patterns, building on the base error handling skill. Demonstrates the 'extends' composition feature.
- tags
- ["error-handling","rust","example"]
- extends
- error-handling-base
# Rust Error Handling
Rust-specific error handling patterns that extend the base error handling skill.
## Rules
- Use `thiserror` for defining library error types
- Use `anyhow` for application-level error handling
- Implement `std::error::Error` trait for custom error types
- Use the `?` operator for ergonomic error propagation
- Prefer `Result<T, E>` over panicking for recoverable errors
- Use `unwrap()` only in tests or when failure is impossible
## Examples
```rust
// Define library errors with thiserror
use thiserror::Error;
#[derive(Error, Debug)]
pub enum ConfigError {
#[error("failed to read config file: {0}")]
Io(#[from] std::io::Error),
#[error("invalid config format: {0}")]
Parse(#[from] toml::de::Error),
#[error("missing required field: {field}")]
MissingField { field: String },
}
```
```rust
// Application-level error handling with anyhow
use anyhow::{Context, Result};
fn load_config(path: &str) -> Result<Config> {
let content = std::fs::read_to_string(path)
.with_context(|| format!("failed to read config from {}", path))?;
let config: Config = toml::from_str(&content)
.context("failed to parse config TOML")?;
Ok(config)
}
```
## Checklist
- [ ] Custom error types use `thiserror` derive
- [ ] Error context is added with `anyhow::Context`
- [ ] No `unwrap()` calls in production code paths
- [ ] `Result` is used instead of `panic!` for recoverable errors
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