yhirose/cpp-peglib

Health v2 · maintenance only

Adoption not part of the score

1057 stars · 128 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A single-file, header-only C++17 library for Parsing Expression Grammars (PEG) with packrat parsing, left recursion support, and AST generation. It includes an online PEG Playground for trying grammars in the browser.

Use cases

• parse a custom DSL in C++
• build a small programming language parser
• write a config file parser with a grammar
• parse structured text like logs or ini files
• generate an AST from a grammar
• prototype parser grammars online

When to choose

• you need a lightweight, dependency-free parser in a C++17 project
• you want packrat parsing or left-recursive grammar support
• you prefer defining grammars as strings rather than code

When to avoid

• you need a full lexer/parser generator with separate code generation steps
• you're not on a C++17-capable compiler
• you need extremely high throughput where hand-written parsers win

Facets

library · maturity active

parser compiler parsers programming-languages developer-tools cpp cross-platform cli header-only peg packrat-parsing left-recursion ast-generation parser-combinator cpp17

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