|----------|---------------| | New project | Use latest stable | | Production project | Follow 6-week cycle | | Library project | Consider MSRV policy |

MSRV (Minimum Supported Rust Version)

[package]
rust-version = "1.70"  # Declare minimum version

[dependencies]
# MSRV-sensitive dependencies require care
serde = { version = "1.0", default-features = false }

Solution Patterns

Pattern 1: Following Stable Releases

# Quarterly update routine
rustup update stable
cargo outdated
cargo audit
cargo test --all-features

# Read release notes
rustup doc --changelog

Pattern 2: Tracking Ecosystem Changes

# Check for breaking changes
cargo update --dry-run

# Security audit
cargo audit

# License check
cargo deny check licenses

# Check dependency tree
cargo tree

Pattern 3: Learning New Features

// Edition 2024 features

// Inline const (1.79+)
const fn compute() -> [u8; 32] {
    let mut arr = [0u8; 32];
    // compute at compile time
    arr
}

// Never type improvements (1.82+)
fn diverge() -> ! {
    panic!("never returns")
}

// Async fn in trait (1.75+)
trait Repository {
    async fn fetch(&self, id: u64) -> Result<Data, Error>;
}

Learning Path

Beginner → Advanced

Basics → Ownership, lifetimes, borrow checker
   ↓
Intermediate → Trait objects, generics, closures
   ↓
Concurrency → async/await, threads, channels
   ↓
Advanced → unsafe, FFI, performance optimization
   ↓
Expert → Macros, type system, design patterns

Information Sources

Official Channels

Source	Content	Frequency
This Week in Rust	Weekly digest, RFCs, blogs	Weekly
Rust Blog	Major releases, deep dives	As released
Rust RFCs	Design discussions	Ongoing
Release Notes	Version changes	Every 6 weeks

Community Resources

Resource	Content
docs.rs	Documentation search
crates.io	Package search
lib.rs	Find alternative crates
Rust Analyzer	IDE plugin

Dependency Management

Regular Updates

# Check outdated dependencies
cargo outdated

# Update compatible versions
cargo update

# Update to latest (may break)
cargo upgrade

Security Audit

# Check for known vulnerabilities
cargo audit

# Check dependency licenses
cargo deny check licenses

# Analyze dependency tree
cargo tree -d  # Show duplicates

Workflow

Quarterly Checklist

Every 3 months:
- [ ] Upgrade to latest stable Rust
- [ ] Run cargo outdated
- [ ] Run cargo audit
- [ ] Check dependencies for breaking changes
- [ ] Evaluate new features worth adopting
- [ ] Update tooling (clippy, rustfmt)

Annual Checklist

Every year:
- [ ] Consider edition upgrade
- [ ] Refactor deprecated patterns
- [ ] Evaluate MSRV policy
- [ ] Update development toolchain
- [ ] Review architecture patterns

Learning Resources

Beginner

The Rust Programming Language - Official book
Rust by Example - Example-driven
Rustlings - Interactive exercises

Intermediate

The Rust Reference - Language reference
Rust Nomicon - Unsafe guide
Effective Rust - Best practices

Advanced

Rust for Rustaceans - Advanced patterns
Async Book - Async/await deep dive
Rust API Guidelines - API design

Practice

Exercism Rust Track - Practice problems
Rust by Practice - Hands-on exercises
Advent of Code - Annual coding challenge

Edition Update Strategy

Edition	Released	Key Features
2015	Original	-
2018	Dec 2018	Module system, NLL
2021	Oct 2021	Disjoint captures, IntoIterator
2024	TBD	Gen blocks, async drop

Upgrading Editions

# Check if upgrade possible
cargo fix --edition

# Update Cargo.toml
# edition = "2024"

# Test thoroughly
cargo test --all-features

Review Checklist

When learning new Rust features:

Verification Commands

# Check Rust version
rustc --version
rustup show

# Update toolchain
rustup update

# Check outdated dependencies
cargo outdated

# Security audit
cargo audit

# License compliance
cargo deny check

# Check for deprecated features
cargo clippy -- -W deprecated

Common Pitfalls

1. Chasing Shiny Features

Symptom: Using unstable features in production

# ❌ Avoid: nightly features in production
#![feature(generic_associated_types)]

# ✅ Good: wait for stabilization
# Use stable alternatives

2. Ignoring MSRV

Symptom: Breaking downstream users

# ✅ Good: declare MSRV
[package]
rust-version = "1.70"

# Test against MSRV in CI
# cargo +1.70 test

3. Not Reading Release Notes

Symptom: Surprised by breaking changes

# ✅ Good: read before updating
rustup doc --changelog

# Check crate changelogs
cargo info <crate> --version <version>

Related Skills

rust-ecosystem - Crate selection and tools
rust-coding - Best practices and conventions
rust-performance - Performance improvements
rust-async - Async/await patterns
rust-error - Error handling evolution

Localized Reference

Chinese version: SKILL_ZH.md - 完整中文版本，包含所有内容

rust-learner

Version Update Strategy

Stable Updates

When to Upgrade

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