AgentSkillsCN

rust-result-error-handling

对于可能失败的操作，优先使用 Result<T, E> 类型，并在 Rust/Tauri 中将错误转换为字符串，以便前端展示。

SKILL.md
--- frontmatter
name: rust-result-error-handling
description: Use Result<T, E> for fallible operations and convert errors to strings for frontend in Rust/Tauri.

Rust Result Error Handling

Pattern

Use Result<T, E> for functions that can fail.

✅ Good

rust
use anyhow::{Context, Result};

fn load_model(path: &str) -> Result<Model> {
    let file = File::open(path)
        .context("Failed to open model file")?;

    let model = parse_model(file)
        .context("Failed to parse model")?;

    Ok(model)
}

For Tauri Commands

Convert to Result<T, String>:

rust
#[tauri::command]
fn load_model_command(path: String) -> Result<Model, String> {
    load_model(&path)
        .map_err(|e| format!("{:#}", e)) // anyhow error to string
}

Error Context

Add context with anyhow:

rust
use anyhow::Context;

File::open(path)
    .context("Failed to open config")?;

parse_json(&contents)
    .context(format!("Failed to parse {}", filename))?;

Never Use

rust
// ❌ Don't panic in production
file.unwrap();
model.expect("Model must exist");

// ✅ Handle errors
let file = file?;
let model = model.ok_or("Model not found")?;