syn
v2.0.118 StableParser for Rust source code
Quick Verdict
- ✓Actively maintained (updated 27d ago)
- ✓Stable API (2.x for 9+ years)
- ✓Massive adoption (153.1K crates depend on it)
- ✓Permissive license (MIT OR Apache-2.0)
Security
Deep Insights
134.3M downloads in the last 30 days (4.5M/day), up 2% from the previous period.
153.1K crates depend on syn — it's part of the Rust ecosystem's core infrastructure. Removing it from your dependency tree would be extremely difficult.
The primary maintainer publishes 232 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.
The API has been stable (1.x) for over 9 years with 351 releases. This level of maturity means you can depend on it without worrying about breaking changes.
Notable dependents include thiserror-impl, serde_derive, anyhow, tokio-macros, futures-macro. When high-quality crates choose syn, it's a strong quality signal.
Health Breakdown
Recency, release consistency, active ratio
Yanked ratio, deps, size, maturity, features
Reverse deps, ownership, ecosystem
Downloads, momentum, growth trend
Docs, repo, license, metadata
Download Trend
Top Dependents
Version Adoption
Release Timeline
Feature Flags
default =["derive", "parsing", "printing", "clone-impls", "proc-macro"]