lexer-generator

Yet another high-performance C++ regex library and lexical analyzer generator like Flex: extends Flex++ with Unicode support, indent/dedent anchors, lazy quantifiers, functions for lex and syntax error reporting and more. Seamlessly integrates with Bison and other parsers.

bison flex compiler regex regular-expression fuzzy-matching lex pcre lexer lexer-generator regex-pattern regular-expressions graphviz-dot lexical-analyzer regex-library regex-engine flex-regex

UpdatedJun 19, 2025
C++

goffrie /plex

Star411

a parser and lexer generator as a Rust procedural macro

parser-generator lexer-generator

UpdatedJun 4, 2024
Rust

b3b00 /csly

Star402

a C# embeddable lexer and parser generator (.Net core)

parser csharp parser-generator dot-net lexer lexer-generator expression-parser recursive-descent-parser grammar-rules mathematical-parser

UpdatedNov 6, 2025
C#

haskell /alex

Star314

A lexical analyser generator for Haskell

lexer-generator

UpdatedAug 3, 2025
Haskell

goccmack /gogll

Star199

Generates generalised LL (GLL) and reduced size LR(1) parsers with matching lexers

go rust golang parser-generator rust-lang rustlang lexer-generator compiler-frontend compiler-construction gll context-free-grammars lr-1

UpdatedJul 31, 2023
Go

loloicci /nimly

Star152

Lexer Generator and Parser Generator as a Library in Nim.

nim parser-generator macros bnf ebnf lexer-generator macro compile-time lexer-parser

UpdatedJun 10, 2022
Nim

pfnet /rflex

Star141

Fast lexer code generator for Rust

rust lexer lexer-generator

UpdatedMar 10, 2025
Rust

h2337 /clex

Star102

clex is a simple lexer generator

regex regexp lex finite-state-machine lexer lexical-analysis lexer-generator nfa lexical-analyzer regex-engine lexer-framework lexer-library

UpdatedSep 21, 2025
C

osa1 /lexgen

Star71

A fully-featured lexer generator, implemented as a proc macro

rust compilers lexer-generator

UpdatedJun 1, 2025
Rust

jack-pappas /facio

Star45

Tools for building compilers, interpreters, and analysis tools in F#

fsharp regex parser-generator grammar lexer-generator cfg

UpdatedOct 3, 2020
F#

codewitch-honey-crisis /pck

Star35

The Parser Construction Kit ("Puck"): A Parser Generator and Grammar Translator in C#

parser grammars generator compiler parser-generator tokenizer transformations gui-application lexer compilers yacc lexer-generator command-line-tool parse-trees generators lalr pck lexers parser-construction-kit

UpdatedNov 24, 2019
C#

openpeeps /toktok

Star31

Generic tokenizer written in Nim language 👑 Powered by std/lexbase and Nim's Macros

programming-language parser nim tokenizer lex tokens lexer lexer-generator generic-library nim-language lexical hacktoberfest nim-lang awesome-nim

UpdatedApr 18, 2024
Nim

John-Leitch /Aphid

Star31

A multiparadigm language intended to be embedded in .NET applications or compiled into other languages like Python or PHP. The internals of Aphid are clean and easy to work with, allowing for rapid creation of derivative domain-specific languages.

c-sharp programming-language parser-generator lexer-generator aphid programming-language-development