rustio rustio.net
67

peg

v0.8.6 Growing

A simple Parsing Expression Grammar (PEG) parser generator.

MIT Edition 2021 MSRV 1.82.0
Parsing tools #parser#parsing#peg#grammar

Quick Verdict

  • โœ“Actively maintained (updated 21d ago)
  • !Pre-1.0: API may have breaking changes
  • โœ“Massive adoption (1.9K crates depend on it)
  • โœ“Permissive license (MIT)

Security

Checking security advisories...
Downloads
26.2M
Dependents
1.9K
Releases
52
Size
25KB

Deep Insights

๐Ÿ“Š
Steady growth

1.1M downloads in the last 30 days (37.0K/day), up 16% from the previous period.

๐Ÿ”—
Widely adopted

1.9K crates depend on peg. Strong ecosystem adoption means battle-tested code and long-term stability.

โš ๏ธ
Single maintainer risk

peg has only 1 owner despite 1.9K dependents. This is a bus-factor concern โ€” consider the implications for long-term support.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 11+ years old, peg hasn't reached 1.0 yet. Expect potential API changes between versions.

๐Ÿ“
Compact crate

At 24KB, peg is lightweight. Small crate size correlates with focused, well-scoped functionality.

๐ŸŒŸ
Used by top crates

Notable dependents include codespan-reporting, gherkin, tendermint-rpc, ply-rs, libcst. When high-quality crates choose peg, it's a strong quality signal.

Health Breakdown

Maintenance 17/25

Recency, release consistency, active ratio

Quality 16/25

Yanked ratio, deps, size, maturity, features

Community 14/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 12/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
41K/day avg-44%
020K40K60K80K100K2/263/164/34/215/95/26

Top Dependents

Version Adoption

v0.6.3
70%
v0.8.5
16%
v0.7.0
6%
v0.8.1
4%
v0.8.4
4%

Release Timeline

10 releasessince 2020
J
F
M
A
M
J
J
A
S
O
N
D
2020
2
2021
1
2022
2
2023
1
2024
2
2025
1
2026
1
Less
More

Feature Flags

default =["std"]

std*traceunstable

README

Loading README...

Maintainers

Dependencies
4
direct dependencies
Dependents
1.9K
crates depend on peg

Similar Crates