zesterer/chumsky

Health v2 · maintenance only

Flags: archived

Adoption not part of the score

4540 stars · 212 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Chumsky is a Rust parser-combinator library for writing expressive, high-performance parsers with rich error diagnostics and recovery. It supports context-free grammars, zero-copy parsing, Pratt expression parsing, and no_std environments.

Use cases

• write a parser for a programming language compiler
• parse configuration files in Rust
• parse binary protocols at the networking layer
• build a lexer and parser for a DSL
• parse expressions with operator precedence
• validate complex input with friendly error messages
• generate railroad diagrams for a grammar

When to choose

• you're writing a compiler or interpreter frontend in Rust
• you need expressive combinators with good error recovery and diagnostics
• you want zero-copy parsing or no_std/embedded support
• you need Pratt parsing or left recursion support

When to avoid

• you need maximum parsing speed above all else (hand-written or LALR parsers may be faster)
• you're not using Rust
• you want a grammar-file-based parser generator rather than combinators in code

Facets

library · maturity active

parser developer-tools parsers programming-languages developer-tools rust cross-platform embedded parser-combinators peg recursive-descent error-recovery zero-copy no-std pratt-parsing lexer

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