parser-generator

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A grammar describes the syntax of a programming language, and might be defined in Backus-Naur form (BNF). A lexer performs lexical analysis, turning text into tokens. A parser takes tokens and builds a data structure like an abstract syntax tree (AST). The parser is concerned with context: does the sequence of tokens fit the grammar? A compiler is a combined lexer and parser, built for a specific grammar.

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antlr /antlr4

Star18.7k

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

javascript python java dart swift golang php parse csharp parsing cpp parser-generator grammar antlr antlr4 language-recognition

UpdatedJan 1, 2026
Java

pegjs /pegjs

Star4.9k

PEG.js: Parser generator for JavaScript

javascript parser-generator pegjs peg

UpdatedNov 8, 2021
JavaScript

lalrpop /lalrpop

Star3.4k

LR(1) parser generator for Rust

rust parser-generator grammar

UpdatedJan 29, 2026
Rust

kevinmehall /rust-peg

Star1.6k

Parsing Expression Grammar (PEG) parser generator for Rust

rust parsing parser-generator grammar peg parsing-expression-grammars

UpdatedDec 22, 2025
Rust

yhirose /cpp-peglib

Star1k

A single file C++ header-only PEG (Parsing Expression Grammars) library

c-plus-plus parsing cpp parser-generator header-only cpp17 peg parsing-expression-grammars

UpdatedDec 9, 2025
C++

mna /pigeon

Sponsor

Star907

Command pigeon generates parsers in Go from a PEG grammar.

parser parser-generator peg

UpdatedJan 13, 2026
Go

ianh /owl

Star802

A parser generator for visibly pushdown languages.

parsing parser-generator

UpdatedDec 26, 2025
C

BNFC /bnfc

Star618

BNF Converter

parser-generator pretty-print bnf lexer-generator grammar-specification bnfc abstract-syntax-tree bnf-converter

UpdatedJan 28, 2026
TeX

ruby /racc

Star554

Racc is an LALR(1) parser generator. It is written in Ruby itself, and generates ruby programs.

parser-generator lalr-parser-generator

UpdatedJan 27, 2026
Yacc

antlr /intellij-plugin-v4

Star490

An IntelliJ plugin for ANTLR v4

parser intellij parser-generator antlr intellij-plugin antlr4 grammar-interpreter

UpdatedJan 29, 2026
Java

peter-winter /ctpg

Sponsor

Star484

Compile Time Parser Generator is a C++ single header library which takes a language description as a C++ code and turns it into a LR1 table parser with a deterministic finite automaton lexical analyzer, all in compile time.

c-plus-plus regex lr-parser parser-generator grammar header-only cpp17 compile-time lookahead lr1 compiler-compiler lr1-parser

UpdatedSep 3, 2024
C++

usethesource /rascal

Sponsor

Star449

The implementation of the Rascal meta-programming language (including interpreter, type checker, parser generator, compiler and JVM based run-time system)